Online Calculator for LED Strip Light Power Supply Requirements

This online calculator helps you determine what LED power supply you will need for your LED strip light project. Simply answer the questions below, and you'll get a quick recommendation.

How long is the length of LED strip you are connecting?


Which LED strip light product are you connecting? (Choose "3rd party" to input power specifications, if using a product not manufactured by Waveform Lighting)

12V Ultra High 95 CRI LED Strip (PN 3003.XX)

24V Ultra High 95 CRI LED Strip (PN 3004.XX)

12V FilmGrade WHITE LED Strip Light (PN 3001.XX)

24V FilmGrade WHITE LED Strip Light (PN 3002.XX)


realUV™ LED Strip Light

SimpleColor™ LED Strip Light

3rd Party LED Strip

Product Details:

Product: Ultra High 95 CRI LED Strip Light
Voltage: DC 12V
Power Draw: 5.5 watts per foot
Total Current: 4.0 amps
Total Power: 55 watts

Power Supply Requirements:

Voltage: DC 12V
Capacity (min): 4.0 amps
Capacity (min): 55 watts
Capacity (recommended): 66 watts


Step-by-step information on how to calculate power supply requirements

Step 1: Determine the length of LED strip you will connect to a single power supply

Step 2: Determine the voltage and watts per foot (or meter) for the LED strip. For example, the Waveform FilmGrade LED strip power draw is 5.5 watts per foot.

You can typically find this information listed on the product page or specification sheet.

Step 3: Calculate the total power draw using the formula [LED Strip Watts] = [Watts per foot] x [Length of LED strip]

Step 4: Find a power supply that has a wattage rating for more than 20% of the LED strip power draw calculated in Step 3.

Example: What power supply wattage is necessary to power 10 feet of the 24V LED strips?

Step 1: Length = 10 ft

Step 2: Voltage = 24V, 5.5 watts per foot

Step 3: Total power draw = 5.5 watts per foot x 10 feet = 55 watts

Step 4: Recommended power supply wattage = 55 watts x 120% = 66 watts