Calculator category

Circuits calculators

Size current, voltage, and power on branch circuits before adding equipment.

5 calculators All calculators

Calculator

Breaker Size Calculator

Step load current up to the next standard breaker size.

Outputs: Sized load · Standard breaker size

Calculator

Solve total resistance, current, and power for two-resistor circuits.

Outputs: Series resistance · Parallel resistance · Series current

Calculator

Price voltage drop for single- and three-phase runs.

Outputs: Drop, single-phase · Drop %, single-phase · Drop, three-phase

Calculator

Convert watts to amps at your circuit voltage.

Outputs: Current · Safe continuous load on 15A circuit · Power (kW)

Calculator

NEC 310.16 copper ampacity from wire size.

Outputs: Base ampacity (copper, 75C) · Max continuous load