Skip to Content

LED Strip Driver & Cable Calculator

Calculate driver wattage, current and safety margin for LED strip installations.


Saleh Deco Lighting Tool

LED Strip Driver & Cable Calculator

Estimate constant-voltage LED-strip load, driver capacity, circuit current and preliminary copper-cable sizes for 12V, 24V or 48V installations.

Use the rated input power from the strip datasheet.
Total metres across all equal-load runs.
Runs are assumed equal in length and wattage.
Reference sizes reflect currently visible Saleh Deco constant-voltage products; availability varies by voltage.

Cable route

The selected voltage-drop limit applies to the complete route from the driver through the main feed and branch cable—not separately to each section.

One-way metres from driver to distribution point. Enter 0 when no shared main feed is used.
One-way metres from distribution point to strip feed.
Both-end mode assumes two equal cable feeds per strip run.
Professional checks and assumptions
Use the strip manufacturer's maximum length per feed point.
Enter the limit of the dimmer, controller, amplifier or terminal.
Constant-voltage strips only. Cable results are preliminary voltage-drop and current-screening recommendations for copper conductors. Strip-PCB voltage loss, installation method, insulation class, grouping, ambient derating, protection devices, terminals and local requirements are not calculated.

How to Use the LED Strip Driver & Cable Calculator

Use verified strip and driver specifications, then review the complete-route cable result and professional checks.

1Use constant-voltage strip data

Select 12V, 24V or 48V and enter the strip's rated watts per metre. Constant-current spotlight drivers are not suitable references for this calculator.

2Set driver utilization

The required capacity equals strip load divided by the selected maximum utilization. At 80%, a 100W load requires at least 125W of rated driver capacity.

3Enter complete cable distances

Enter one-way distances. The calculator includes outgoing and return conductors and applies the selected voltage-drop limit to the total main-plus-branch route.

4Verify strip run length

The calculator reports metres per run. Enter the manufacturer's maximum run length to identify when additional feeds or shorter runs are required.

What the cable result means

The result searches standard metric copper sizes and chooses a combination that passes both the complete-route voltage-drop target and conservative current screening.

What remains outside this calculation
  • Voltage loss inside the LED strip PCB
  • Far-end strip voltage and brightness uniformity
  • Cable protection and installation method
  • Driver thermal derating and enclosure requirements
  • Dimming compatibility, IP rating and controller channel design


What does the LED Strip Driver & Cable Calculator do?

LED strip driver sizing helps determine the power supply wattage needed for a low-voltage LED strip installation. The calculator uses the strip voltage, wattage per metre, total strip length, and number of runs to estimate the total connected load, output current, and recommended driver size.

The cable section provides a preliminary copper cable recommendation based on load, voltage, distance, and allowable voltage drop. This helps users estimate whether the selected cable size is likely suitable for the installation.

How accurate is the calculator?

The Saleh Deco LED Strip Driver & Cable Calculator provides a preliminary planning estimate. It calculates the total strip load, recommended driver wattage, output current, and a basic cable recommendation using standard low-voltage DC voltage-drop logic.

Actual results can vary according to strip construction, maximum run length, power injection points, controller limits, cable routing, ambient temperature, installation method, terminal ratings, and the technical requirements of the selected products.

Need help choosing a fitting?

Browse our LED strip lighting, drivers, and lighting profile solutions, or contact Saleh Deco with your strip length, voltage, installation layout, and application for a more detailed recommendation.

Browse LED Strip Lighting ​Contact Saleh Deco