Inputs

Load current A Enter a numeric project value in A at or above 0.01. One-way cable length m Enter a numeric project value in m at or above 0.1. Conductor area mm2 Enter a numeric project value in mm2 at or above 0.1. Conductor resistivity ohm mm2/m Enter a numeric project value in ohm mm2/m at or above 0.001. Current-carrying conductor count Enter a numeric project value between 1 and 4. Minimum planning end voltage V Enter a numeric project value in V between 1 and 12.

Loop resistance -- ohm

Voltage drop -- V

Estimated end voltage -- V

Voltage drop percentage -- %

Planning recommendation --

Calculation details

Loop resistance: -- ohm
Voltage drop: -- V
Estimated end voltage: -- V
Voltage drop percentage: -- %
Planning recommendation: --

Important notes

Use explicit one-way length and include both current-carrying conductors in the loop calculation.
Cable selection, segregation, protection, thermal derating, and Australian wiring requirements require a licensed electrician.

Formulas

\(\displaystyle R = \rho \frac{L_{\mathrm{one-way}}N}{A}\)
\(\displaystyle V_{\mathrm{drop}} = IR,\quad V_{\mathrm{end}} = 12 - V_{\mathrm{drop}}\)
Use the actual cable arrangement and manufacturer limits; this is not an electrical installation approval.

Estimate resistance, voltage drop, and end voltage for a 12 V LED strip circuit.

12 V LED Strip Voltage Drop Calculator is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.

Inputs

Results

Formulas