Supply rating equals strip power divided by maximum loading: 80% means divide by 0.8. Each section has a separate feed from one supply. Enter measured loop resistance and the datasheet length limit; isolate sections electrically.
How to use
- Enter the dimensions and electrical values.
- Adjust the assumptions to match your components.
- Read the result and check the technical limits below.
Formula and assumptions
P = m × W/m; PSU ≥ P / 0.8; ΔV = (R_loop/m × I/m × ℓ²/2) + (2ρL_cabo/A × I_ramal).
Calculated example
- LED strip length
- 5 m
- Power per metre
- 14.4 W/m
- Voltage
- 12 V
- Maximum supply loading
- 80 %
- Power
- 72 W
- Minimum power supply
- 90 W
- Feed points / independent branches
- 3
- Spacing
- 1.6667 m