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Home Air

Home Air Calculators

Comfort, humidity, ventilation, heating, cooling, and air quality tools.

Home Air Dehumidifier Size Calculator Estimate the right dehumidifier pint capacity for a room based on square footage, ceiling height, dampness, and room temperature. Home Air Air Purifier Size Calculator Calculate the CADR rating an air purifier should have for your room size and desired air changes per hour. Home Air Dehumidifier Electricity Cost Calculator Estimate how much a dehumidifier costs to run per day, month, and season from wattage, run time, duty cycle, and electricity rate. Home Air Basement Dehumidifier Size Calculator Estimate basement dehumidifier pint size from basement square footage, ceiling height, humidity, dampness level, and cool-room conditions. Home Air Humidity Level Calculator Check whether an indoor humidity level is dry, comfortable, humid, or high-risk based on relative humidity and room temperature. Home Air Dehumidifier vs Air Conditioner Cost Calculator Compare estimated electricity cost for running a dehumidifier versus a window air conditioner over the same daily schedule. Home Air Air Purifier vs HVAC Filter Cost Calculator Compare air purifier electricity and filter replacement cost with HVAC filter replacement cost over a chosen period. Home Air Humidity Comfort Calculator Estimate whether indoor humidity feels too dry, comfortable, humid, or likely to feel sticky based on relative humidity and temperature. Home Air BTU Air Conditioner Room Size Calculator Estimate air conditioner BTU capacity from room square footage, ceiling height, sun exposure, people, and kitchen heat. Home Air Heater Size Calculator Estimate electric heater wattage or BTU output needed for a room based on area, ceiling height, and insulation quality. Home Air Ceiling Fan Size Calculator Estimate ceiling fan blade span from room square footage and room shape for better air movement and comfort. Home Air Bathroom Exhaust Fan CFM Calculator Estimate bathroom exhaust fan CFM from floor area, ceiling height, shower type, and recommended air changes. Home Air Humidifier Size Calculator Estimate humidifier output needed for a room or home based on square footage, ceiling height, and dryness level. Home Air Window AC Electricity Cost Calculator Estimate how much a window air conditioner costs to run daily, monthly, and seasonally from watts, hours, and electric rate. Home Air Basement Humidity Calculator Evaluate basement humidity risk from relative humidity, temperature, and basement dampness conditions. Home Air Air Changes Per Hour Calculator Calculate air changes per hour from airflow in CFM and room volume for rooms, fans, purifiers, and ventilation planning. Home Air CFM to ACH Calculator Convert CFM airflow into ACH for a room, grow tent, workshop, bathroom, or air purifier setup. Home Air Whole-House Dehumidifier Cost Calculator Estimate whole-house dehumidifier operating cost from wattage, runtime, compressor duty cycle, season length, and electricity rate. Home Air Crawl Space Dehumidifier Size Calculator Estimate crawl space dehumidifier pint capacity from crawl space area, height, moisture level, ventilation, and ground vapor barrier quality. Home Air Mini Split Size Calculator Estimate mini split BTU size from room square footage, ceiling height, sun exposure, insulation, people, and kitchen or heat-load factors. Home Air Heat Pump Savings Calculator Estimate heat pump savings by comparing current heating cost, heat pump efficiency, usage, and expected percent of load shifted. Home Air Window AC Size Calculator Estimate window air conditioner BTU size from room square footage, ceiling height, sun exposure, people, and kitchen heat load. Home Air Air Purifier Filter Replacement Cost Calculator Estimate yearly air purifier filter replacement cost from filter price, replacement interval, number of units, and prefilter cost. Home Air MERV Filter Size/Replacement Cost Calculator Estimate HVAC filter replacement cost from filter size count, MERV filter price, replacement interval, and number of returns. Home Air Heat Pump vs Furnace Cost Calculator Compare estimated yearly heating cost for a heat pump and furnace using seasonal electricity use, fuel use, and local energy rates. Home Air Air Purifier Annual Ownership Cost Calculator Estimate yearly air purifier ownership cost from filter replacement price, replacement frequency, wattage, runtime, and electricity rate. Home Air Bathroom Exhaust Fan Runtime Cost Calculator Estimate bathroom exhaust fan runtime and electricity cost from fan wattage, minutes per shower, showers per day, days, and electricity rate.

Costs

Cost Calculators

Monthly cost, yearly cost, utility, appliance, fuel, and energy-use tools.

Costs Electricity Cost Calculator Estimate appliance electricity cost from watts, runtime, and local rate, then compare daily, monthly, and yearly bill impact. Costs Water Bill Cost Calculator Estimate water bill cost from gallons used, cost per gallon, fixed monthly charges, and sewer or wastewater multipliers. Costs Internet Cost Comparison Calculator Compare monthly and yearly internet plan cost after promo pricing, equipment rental, taxes, fees, and contract length. Costs Home Office Electricity Cost Calculator Estimate home office electricity cost from computer, monitor, lighting, peripherals, hours, workdays, and kWh rate. Costs EV Charging Cost Calculator Estimate electric vehicle charging cost from battery kWh added, charging efficiency, and electricity rate. Costs Generator Fuel Cost Calculator Estimate generator fuel cost from fuel burn rate, runtime, fuel price, and load factor. Costs Space Heater vs Central Heat Cost Calculator Compare the cost of using a plug-in space heater with the estimated cost of heating a room using central heat. Costs LED vs Incandescent Bulb Cost Calculator Compare electricity cost for LED and incandescent bulbs from watts, hours used, bulb count, and electricity rate. Costs Monthly Subscription Cost Calculator Add up monthly subscriptions, yearly renewals, apps, memberships, and software plans to compare monthly and yearly recurring cost. Costs Gas Cost Calculator Estimate fuel cost for a trip from miles driven, vehicle MPG, and gas price per gallon. Costs Commute Cost Calculator Estimate monthly commute cost from round-trip miles, commute days, MPG, gas price, parking, and tolls. Costs Streaming Service Yearly Cost Calculator Estimate yearly streaming costs from monthly plans, add-ons, annual subscriptions, and tax or fee allowance. Costs Appliance Wattage Cost Calculator Estimate appliance electricity cost from watts, daily use, duty cycle, and electricity rate. Costs Space Heater Electricity Cost Calculator Estimate space heater operating cost from wattage, hours used, electric rate, and number of days. Costs Refrigerator Electricity Cost Calculator Estimate refrigerator electricity cost from average wattage, duty cycle, and electricity rate. Costs Gaming PC Electricity Cost Calculator Estimate gaming PC electricity cost from average watts, hours played, days used, and electricity rate. Costs Laundry Cost Calculator Estimate laundry electricity cost from loads per week, washer energy, dryer energy, and electricity rate. Costs Pool Pump Electricity Cost Calculator Estimate pool pump operating cost from pump watts, daily runtime, days used, and electricity rate. Costs Electric Bill Estimator by State Estimate electric bill from monthly kWh, state or local electricity rate, fixed charges, taxes, and seasonal usage factor. Costs Solar Panel Savings Calculator Estimate solar panel savings from monthly electric bill, offset percentage, system cost, incentives, and expected annual degradation. Costs Generator Size Calculator Estimate generator watt size from running watts, starting surge watts, critical circuits, and safety margin. Costs Battery Backup Runtime Calculator Estimate battery backup runtime from battery watt-hours, load watts, inverter efficiency, and usable capacity percentage. Costs Portable Power Station Runtime Calculator Estimate portable power station runtime from watt-hour capacity, device watts, inverter efficiency, and number of devices. Costs Appliance Replacement Savings Calculator Estimate savings from replacing an appliance by comparing old watts, new watts, daily hours, electricity rate, and purchase cost. Costs Reverse Osmosis Filter Cost Calculator Estimate reverse osmosis filter replacement cost from prefilter, membrane, postfilter prices, replacement intervals, and water use. Costs Pool Heater Cost Calculator Estimate pool heater operating cost from heater BTU, efficiency, hours used, fuel or electricity rate, and days per month. Costs Hot Tub Electricity Cost Calculator Estimate hot tub electricity cost from heater watts, pump watts, daily runtime, standby use, and electricity rate. Costs Solar Payback Calculator Estimate solar panel payback period from system cost, incentives, yearly production, electricity rate, and annual maintenance. Costs Generator Fuel Cost Comparison Calculator Compare generator fuel costs for two fuel choices using runtime, burn rates, fuel prices, and load factor. Costs Ceiling Fan Electricity Cost Calculator Estimate ceiling fan electricity cost from fan wattage, daily runtime, number of fans, days used, and electricity rate. Costs Dishwasher Electricity and Water Cost Calculator Estimate dishwasher electricity and water cost from cycles per week, kWh per cycle, gallons per cycle, utility rates, and drying use. Costs Oven vs Air Fryer Electricity Cost Calculator Compare oven and air fryer electricity cost using wattage, cook time, preheat time, uses per week, and electricity rate. Costs Christmas Lights Electricity Cost Calculator Estimate holiday light electricity cost from watts per strand, strand count, hours per night, display days, and electricity rate. Costs Portable AC Electricity Cost Calculator Estimate portable AC electricity cost from watts, runtime, compressor duty cycle, days used, and electricity rate. Costs Heat Lamp Electricity Cost Calculator Estimate heat lamp cost per day or month from watts, lamp count, daily runtime, days used, and electricity rate with safety reminders.

Home Projects

Home Project Calculators

Paint, drywall, flooring, concrete, yard materials, roofing, and repair tools.

Home Projects Paint Coverage Calculator Estimate how many gallons of paint to buy based on wall area, doors and windows, number of coats, coverage per gallon, and waste. Home Projects Flooring Cost Calculator Estimate flooring material quantity and project cost using room dimensions, waste percentage, material price, and optional labor cost. Home Projects Mulch Calculator Calculate mulch needs in cubic feet, cubic yards, and bags based on landscape area, desired depth, and bag size. Home Projects Drywall Sheet Calculator Estimate drywall sheet count from wall area, sheet size, number of sides, and waste allowance. Home Projects Tile Calculator Estimate tile quantity from area, tile size, grout layout, and waste for floors, walls, backsplashes, and showers. Home Projects Wallpaper Calculator Estimate wallpaper rolls from wall area, roll coverage, pattern repeat, and waste allowance. Home Projects Concrete Calculator Calculate concrete volume in cubic yards from length, width, thickness, and waste allowance. Home Projects Gravel Calculator Estimate gravel volume in cubic yards and tons from area, depth, and material density. Home Projects Topsoil Calculator Estimate topsoil volume in cubic yards from lawn or garden area and desired depth. Home Projects Sod Calculator Estimate sod rolls or pallets from lawn area, roll coverage, and waste allowance. Home Projects Fence Material Calculator Estimate fence posts, panels, rails, or pickets from total fence length and spacing. Home Projects Deck Board Calculator Estimate deck board count from deck area, board width, board length, gap, and waste allowance. Home Projects Stair Carpet Calculator Estimate stair carpet length from tread depth, riser height, number of stairs, and landing allowance. Home Projects Basement Waterproofing Cost Calculator Estimate basement waterproofing cost from basement perimeter, wall treatment area, drainage work, sump pump needs, and repair allowance. Home Projects Sump Pump Size Calculator Estimate sump pump gallons-per-hour capacity from drainage area, rainfall rate, runoff factor, and vertical lift. Home Projects Cabinet Paint Calculator Estimate cabinet paint needed from number of doors, drawer fronts, cabinet box area, coats, coverage, and waste allowance. Home Projects Primer Calculator Estimate primer gallons from surface area, number of coats, primer coverage, porosity factor, and waste allowance. Home Projects Caulk Calculator Estimate caulk tubes needed from linear feet, bead width, bead depth, tube volume, and waste allowance. Home Projects Insulation Calculator Estimate insulation bags or batts needed from area, target R-value, product coverage, cavities, and waste allowance. Home Projects Spray Foam Cost Calculator Estimate spray foam insulation cost from square footage, thickness, board feet, cost per board foot, and waste allowance. Home Projects Gutter Size Calculator Estimate gutter capacity need from roof drainage area, roof pitch factor, rainfall intensity, and downspout spacing. Home Projects Roofing Shingle Calculator Estimate roofing shingle bundles and squares from roof area, pitch multiplier, bundle coverage, and waste allowance. Home Projects Driveway Sealer Calculator Estimate driveway sealer buckets from driveway square footage, coats, coverage per bucket, surface condition, and waste allowance. Home Projects Paver Sand Calculator Estimate paver base or leveling sand from patio area, sand depth, density, and waste allowance in cubic yards and tons. Home Projects Retaining Wall Block Calculator Estimate retaining wall block count from wall length, wall height, block face size, cap blocks, and waste allowance. Home Projects Water Softener Size Calculator Estimate water softener grain capacity from household water use, hardness, iron adjustment, people, and regeneration interval. Home Projects Pool Chemical Dosage Calculator Estimate pool chemical dose from pool gallons, label dose per 10,000 gallons, target increase, and label strength. Home Projects Grass Seed Calculator Estimate grass seed needed from lawn area, seeding rate, overseeding factor, and waste allowance. Home Projects Garden Soil Mix Calculator Estimate garden soil, compost, and amendment volume for raised beds or planting areas from dimensions and mix ratios. Home Projects Closet Shelving Material Calculator Estimate closet shelving boards, bracket count, and shelf liner length from shelf length, shelf count, and support spacing. Home Projects Pressure Washer Time and Water Estimate Calculator Estimate pressure washing time and water use from surface area, cleaning rate, gallons per minute, passes, and setup time. Home Projects Leaf Bag Calculator Estimate lawn leaf bags needed from yard area, leaf depth, compaction factor, and bag volume.

3D Printing

3D Printing Calculators

Filament, resin, print cost, quotes, supports, infill, speed, and print-farm planning tools.

3D Printing 3D Print Cost Calculator Estimate the material and electricity cost of a filament 3D print from grams used, spool price, print time, printer watts, and failure buffer. 3D Printing 3D Print Quote Calculator Build a small 3D print quote from material cost, electricity, labor time, machine time, failure risk, and desired margin. 3D Printing Filament Cost Calculator Calculate filament cost for a print from grams used, spool price, spool weight, and a waste percentage for supports, brim, purge, or failed starts. 3D Printing Filament Length Calculator Convert filament grams to meters from filament diameter and material density for PLA, PETG, ABS, TPU, and similar 3D printing materials. 3D Printing Filament Spool Remaining Calculator Estimate how many prints remain on a filament spool from current spool weight, empty spool weight, grams per print, and waste buffer. 3D Printing Resin Print Cost Calculator Estimate resin print cost from milliliters used, bottle price, bottle size, consumables, and a waste buffer for supports and failed prints. 3D Printing Resin Bottle Print Count Calculator Estimate how many resin prints fit in one bottle from bottle volume, resin per print, and a support or failure waste percentage. 3D Printing 3D Print Electricity Cost Calculator Estimate electricity cost for one 3D print or a monthly print queue from average printer watts, print hours, electricity rate, and print count. 3D Printing Infill Material Calculator Estimate print material from solid model weight, wall/top/bottom share, and infill percentage before changing slicer settings. 3D Printing Support Material Calculator Estimate support material weight from model weight, support percentage, interface percentage, and a removal or purge buffer. 3D Printing 3D Print Scale Calculator Estimate new material weight and print time after scaling a 3D model by percentage using cube-law volume scaling. 3D Printing Layer Height Print Time Calculator Estimate how changing layer height affects 3D print time from a baseline print time, baseline layer height, and new layer height. 3D Printing Max Print Speed Calculator Estimate maximum practical print speed from hotend volumetric flow, line width, layer height, and requested slicer speed. 3D Printing Print Farm Capacity Calculator Estimate monthly 3D print farm capacity from printer count, average print hours, uptime, available days, and success rate. 3D Printing Failed Print Waste Cost Calculator Estimate monthly failed-print waste cost from material cost, electricity, print hours, machine rate, failure rate, and monthly print count.

Moving

Moving Calculators

Boxes, supplies, truck size, storage, labor, insurance, and move-cost tools.

Moving Moving Box Calculator Estimate how many moving boxes you need from bedrooms, occupants, and packing level, then split the count into small, medium, large, and wardrobe boxes. Moving Moving Truck Size Calculator Estimate moving truck size from bedrooms, home square footage, boxes, and furniture level before reserving a rental truck. Moving Storage Unit Size Calculator Estimate storage unit size from bedrooms, boxes, furniture level, and how tightly items can be stacked. Moving Moving Cost Calculator Estimate moving cost from truck rental, mileage, fuel, supplies, labor hours, and optional helper costs. Moving Packing Tape Calculator Estimate how many rolls of packing tape you need from box count, tape per box, and extra sealing allowance. Moving Moving Supplies Cost Calculator Estimate moving supply cost from boxes, tape, packing paper, bubble wrap, labels, and specialty supplies. Moving Renting a Moving Truck vs Hiring Movers Calculator Compare do-it-yourself moving truck cost with hiring movers based on rental, mileage, supplies, and quoted mover cost. Moving Moving Container Size Calculator Estimate moving container size from bedrooms, home square footage, box count, furniture level, and storage density. Moving Storage Unit Cost Calculator Estimate storage unit cost from monthly rent, admin fees, insurance, lock cost, promo months, and storage duration. Moving Moving Insurance Calculator Estimate moving insurance or valuation cost from declared item value, coverage rate, deductible, and included carrier protection. Moving Cross-Country Moving Cost Calculator Estimate long-distance moving cost from shipment weight or volume, distance, rate, packing services, insurance, and fees. Moving Moving Truck Gas Cost Calculator Estimate moving truck fuel cost from trip distance, truck MPG, gas price, detour miles, and return-trip assumptions. Moving Moving Labor Cost Calculator Estimate moving labor cost from movers, hourly rate, hours, travel fees, stair fees, and tip allowance. Moving Storage Unit Duration Cost Calculator Estimate storage unit cost over a chosen duration from monthly rent, insurance, admin fees, promo discounts, and expected rate increase. Moving Packing Paper Calculator Estimate packing paper sheets needed from box count, fragile boxes, sheets per fragile box, and buffer. Moving Moving Label Planner Calculator Estimate moving labels needed from rooms, boxes per room, fragile labels, priority labels, and duplicate label sets.

Aquarium

Aquarium Care Calculators

Tank size, heaters, filters, dosing, water changes, substrate, CO2, and weight tools.

Aquarium Aquarium Volume Calculator Calculate aquarium volume in gallons and liters from rectangular tank dimensions in inches. Aquarium Aquarium Heater Size Calculator Estimate aquarium heater wattage from tank size, room temperature, and target water temperature. Aquarium Aquarium Water Change Calculator Calculate how many gallons of aquarium water to remove and replace for a chosen water change percentage. Aquarium Aquarium Stocking Estimate Calculator Estimate a conservative freshwater stocking range from aquarium gallons and stocking style. Aquarium Aquarium Filter Flow Calculator Estimate aquarium filter flow rate in GPH from tank volume and desired turnover per hour. Aquarium Aquarium Substrate Calculator Estimate aquarium substrate pounds from tank footprint, substrate depth, and material density. Aquarium Aquarium Salt Dosage Calculator Estimate aquarium salt dosage from tank gallons and teaspoons per gallon for measured freshwater treatment planning. Aquarium Aquarium Medication Dosage Calculator Estimate aquarium medication dose from water volume and label dose per 10 gallons. Aquarium Aquarium CO2 Calculator Estimate dissolved CO2 from KH and pH for planted aquarium planning, injection checks, and rough livestock safety review. Aquarium Aquarium Water Conditioner Dosage Calculator Calculate dechlorinator or water conditioner dose from replacement water gallons and label dose. Aquarium Aquarium Cycle Ammonia Calculator Estimate ammonia dose for fishless cycling from tank gallons, target ppm, and product strength. Aquarium Aquarium Weight Calculator Estimate filled aquarium weight from gallons, empty tank weight, substrate, and decor. Aquarium Aquarium Stand Weight Calculator Estimate recommended stand capacity from filled aquarium weight and a safety factor. Aquarium Aquarium Lighting Calculator Estimate aquarium lighting watts or PAR planning target from tank length, width, plant level, depth, and light intensity factor. Aquarium Aquarium Fertilizer Dosing Calculator Estimate planted aquarium fertilizer dose from tank gallons, label dose per gallons, dosing frequency, and target strength. Aquarium Aquarium Canister Filter Size Calculator Estimate canister filter flow target from tank gallons, desired turnover, media loss factor, and stocking level. Aquarium Aquarium Heater Electricity Cost Calculator Estimate aquarium heater electricity cost from heater watts, duty cycle, hours, electricity rate, and days per month. Aquarium Aquarium Stocking by Fish Type Calculator Estimate aquarium stocking capacity by fish size, activity factor, schooling count, tank gallons, and filtration buffer.

Finance

Finance Calculators

Payments, affordability, debt, insurance, refinance, and loan planning tools.

Finance Mortgage Payment Calculator Estimate monthly mortgage payment from loan amount, interest rate, loan term, property tax, insurance, and HOA costs. Finance Rent vs Buy Calculator Compare renting and buying cost over time from monthly rent, mortgage payment, ownership costs, appreciation, and expected years. Finance Home Affordability Calculator Estimate affordable home price from gross monthly income, debt payments, down payment, interest rate, term, and housing ratio. Finance Loan Payment Calculator Estimate monthly loan payment from principal, annual interest rate, loan term, fees, and optional extra monthly payment. Finance Credit Card Payoff Calculator Estimate credit card payoff time and interest from balance, APR, monthly payment, and optional extra payment amount. Finance Debt Snowball Calculator Estimate debt snowball payoff time from total balances, current minimum payments, and extra monthly debt payment budget. Finance Car Payment Calculator Estimate monthly car payment from vehicle price, down payment, trade-in, sales tax, interest rate, loan term, and fees. Finance Car Affordability Calculator Estimate affordable car price from monthly budget, loan rate, term, down payment, tax, fees, and insurance allowance. Finance Auto Insurance Cost Estimator Estimate monthly auto insurance cost from base premium, vehicle factor, driver factor, coverage factor, and discount percentage. Finance Home Insurance Estimate Calculator Estimate annual home insurance premium from dwelling coverage, local rate per thousand, deductible factor, and discount percentage. Finance Credit Card Interest Calculator Estimate credit card interest over a number of days from card balance, APR, daily balance changes, and optional fees. Finance Mortgage Refinance Calculator Estimate refinance savings and break-even timing from current payment, new loan amount, new rate, term, and closing costs.

Teacher tools

Teacher Calculators

Teacher calculators for classroom budgets, rewards, minutes, grading, and fluency.

Education Classroom Supply Budget Calculator Estimate classroom supply budget from student count, per-student supplies, shared materials, teacher purchases, and donation offsets. Education Behavior Reward Cost Calculator Estimate classroom behavior reward cost from student count, reward frequency, cost per reward, weeks, and participation rate. Education IEP/Intervention Minutes Calculator Estimate weekly and yearly IEP or intervention service minutes from sessions per week, minutes per session, group size, and school weeks. Education Reading Fluency WPM Calculator Calculate reading fluency words per minute from total words read, reading time, errors, and accuracy percentage. Education Grade Percentage Calculator for Teachers Calculate assignment or test percentage from points earned, points possible, extra credit, and optional weighting factor. Education Behavior Incident Rate Calculator Estimate classroom behavior incident rate per student, per day, and per 100 student-days. Education PBIS Reward Budget Calculator Estimate a PBIS reward budget from students, points earned, redemption rate, reward value, and school weeks. Education Classroom Economy Cost Calculator Estimate classroom economy payout and store cost from students, jobs, paydays, savings rate, and redemption value. Education Sticker/Reward Supply Calculator Estimate stickers, tickets, or small rewards needed from class size, rewards per student, weeks, and buffer. Education Small Group Intervention Schedule Calculator Estimate how many small intervention groups and weekly minutes are needed from student count, group size, sessions, and session length. Education Progress Monitoring Growth Calculator Calculate average weekly growth from baseline score, current score, and weeks of intervention. Education Reading WCPM Growth Calculator Estimate weekly reading fluency growth from baseline WCPM, current WCPM, weeks, and target WCPM. Education Attendance Percentage Calculator Calculate student attendance percentage from enrolled days, absences, and tardy-equivalent days. Education Parent Contact Log Frequency Calculator Estimate how many parent contacts are needed per week from students, contact goal, weeks, and completed contacts. Education Classroom Seating Group Calculator Estimate seating groups and leftover seats from student count, seats per group, and extra seats. Education Classroom Donation Wish List Calculator Estimate classroom donation wish-list quantities from students, requested items per student, shared supplies, and backup stock. Education Missing Assignment Rate Calculator Calculate missing assignment rate from assigned work, missing work, student count, and class period length. Education Behavior Data Trend Calculator Estimate behavior data trend from baseline incidents, current incidents, observation days, and student count. Education Token Economy Reward Rate Calculator Estimate token economy reward rate from students, tokens earned, reward cost, redemption target, and school days.