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← All toolsWire & Cable Size Calculator

Enter your load. See the cable size instantly.

Estimate conductor size and voltage drop without hunting through tables. Results update as you type.

V
m
%
Advanced assumption
Default: 1.00 for single-phase kW input.
Recommended conductor—
Waiting
Design current—
Voltage drop—
Drop percentage—

Enter valid values to calculate.

V1 screening assumptionThis estimate uses conservative built-in design-current limits and a resistance-based voltage-drop check. Installation method, insulation, ambient temperature, cable grouping, local code and protection devices can require a different size.

Use this as a sizing check, not electrical approval.

The calculator is useful for planning and comparison. Final cable selection for an installation should be checked against the rules that apply where the work is being done and by a qualified electrician or electrical designer.