Voltage Drop Calculator
Use this calculator to determine the voltage drop in your supply cable. This helps decide whether your LEDs will shine reliably and at full brightness.
Note: The calculation is based on a supply cable with constant current – not on the LED strip itself, where the loss is distributed over the length.
Voltage drop in the cable: 0 V
Voltage drop in percent: 0 %
Remaining voltage at the end of the cable: 0 V
How it is calculated:
The factor 2 accounts for the return path through the cable. The resistance depends on the cable cross-section.
This allows you to calculate the appropriate current from the known power and voltage.
| Cross-section (mm²) | Resistance (Ohm/m) |
|---|---|
| 0.25 mm² | 0.0695 Ω/m |
| 0.50 mm² | 0.0356 Ω/m |
| 0.75 mm² | 0.0233 Ω/m |
| 1.0 mm² | 0.0178 Ω/m |
| 1.5 mm² | 0.0117 Ω/m |
| 2.5 mm² | 0.0070 Ω/m |
| 4.0 mm² | 0.0044 Ω/m |
| 6.0 mm² | 0.0029 Ω/m |
Disclaimer
The calculations are for informational purposes only. Despite careful checking, we do not guarantee the accuracy, completeness, or timeliness of the information. For the planning of professional electrical installations, you should consult a qualified electrician. Use of the calculator is at your own risk.