Result
130 watt supply minimum LED power supply
Compare a correctly rated constant-voltage supply at or above 130 watt supply, using the same voltage as the strip.
- LED strip load
- 98.4 watts
- Required supply current
- 5.12 amps
- Strip rolls needed
- 2 rolls
- Installed current before headroom
- 4.1 amps
More
Optional equipment checkWhat to compare before buying
Use the calculated wattage and current to compare constant-voltage supplies, strips, controllers, connectors, and wiring by voltage, continuous current, channel load, listing, enclosure, cooling, and installation method.
Buying checklist
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- Cost
- Free
- Login
- Not required
- Best use
- Calculate an LED-strip power-supply wattage, current, and roll quantity from strip length, watts per foot, voltage, and electrical headroom.
- Output
- Browser result with print and PDF options
Result summary
Quick answer
With the sample inputs, this calculator returns 130 watt supply minimum LED power supply. LED strip load: 98.4 watts. Use 130 watt supply minimum LED power supply as a project starting point, then round to the way the material is sold and add an appropriate waste or repair buffer.
Instructions
How to use this calculator
Open the short walkthrough for choosing and checking inputs.
The calculator multiplies installed length by rated watts per foot, adds power-supply headroom, rounds up to a ten-watt tier, divides by strip voltage for current, and rounds strip length to whole rolls.
Page guide
On this page
Jump directly to the part of the calculator you need.
Calculation details
Formula and methodology
See the exact math used to produce the result.
The calculator converts measurements and coverage assumptions into material quantity or project cost.
Before acting
Assumptions to check
Review the real-world details that can change the estimate.
The key inputs are Installed strip length, Rated strip power, Strip voltage, Power-supply headroom, Length per strip roll. Confirm matching constant voltage, continuous supply and controller current, conductor and connector ratings, injection points, voltage drop, ventilation, enclosure and listing requirements, and local code before permanent installation.
More guidance Examples, methodology, and planning checks Open the worked example, review notes, reference tables, and practical next checks.
When to round up
Confirm constant-voltage type, strip voltage, controller current, conductor gauge, connector rating, injection points, voltage drop, ventilation, enclosure, listing requirements, and local electrical code; use a qualified installer for permanent line-voltage work.
When to use this calculator
- Estimating materials before shopping
- Checking project coverage and waste
- Building a simple supply list
Tips for better estimates
- Measure twice and write down the units.
- Check product coverage and package sizes before shopping.
- Add waste for texture, touch-ups, pattern matching, and measurement error.
How this estimate was built
This page multiplies LED strip length by rated watts per foot, adds continuous-load headroom, rounds the supply target upward, calculates current at the selected voltage, and counts whole strip rolls.
Worked example
Example inputs: Installed strip length: 32.8 ft; Rated strip power: 3 watts/ft; Strip voltage: 24 V; Power-supply headroom: 25 %; Length per strip roll: 16.4 ft. With those values, the calculator returns 130 watt supply minimum LED power supply. Compare a correctly rated constant-voltage supply at or above 130 watt supply, using the same voltage as the strip.
Project size to estimated materials
| Small room or repair | Measure carefully and buy one practical unit above the estimate |
|---|---|
| Medium project | Check product coverage and round up to full units |
| Large or irregular area | Add a project-specific buffer before buying |
| Patterned or irregular work | Use a larger waste factor before buying |
Example scenarios
- Use 130 watt supply minimum LED power supply as the first material estimate, then compare it with product coverage and real project conditions.
- Add a project-specific buffer for measurement error, damaged material, odd layouts, or products that only sell in full units.
- Before buying, check whether prep supplies, fasteners, trim pieces, connectors, or tools are also needed.
Quick reference chart
| Sample result | 130 watt supply minimum LED power supply |
|---|---|
| LED strip load | 98.4 watts |
| Required supply current | 5.12 amps |
| Strip rolls needed | 2 rolls |
| Installed current before headroom | 4.1 amps |
| Best next step | Compare the result with the measurements, product coverage, full-unit sizes, site conditions, and project instructions before buying supplies. |
FAQs
LED Strip Power Supply Calculator questions
Can I use this as a final shopping list?
Use it as a planning estimate, then compare the result with your measurements, product coverage, site conditions, full-unit sizes, and project instructions.
Should I add a safety margin?
Usually yes. Add a buffer for measurement error, damaged material, layout changes, products sold in full units, and the extra material that fits this specific project.
What should I check before buying?
Check measurements, product coverage, package size, prep needs, compatible tools, fasteners, trim pieces, or other supplies the project requires.
Can this replace professional construction advice?
No. For structural, electrical, plumbing, roofing, or safety-critical work, confirm with a qualified professional.
Is the led strip power supply calculator exact?
No. It is a project planning estimate. Compare it with your measurements, product coverage, site conditions, full-unit sizes, and project instructions.
What inputs matter most?
Strip length, rated watts per foot, voltage, supply headroom, and roll length determine power and quantity.
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Common planning mistakes
Skipping the right project buffer, measuring once, ignoring product limits, and forgetting the extra supplies or prep work that apply to this material.
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