120V Calculator

120V Calculator

120V Calculator calculates 120 volt outlet, breaker, and appliance planning. Enter the known electrical values, choose the circuit type, and get a fast power, current, kW, kVA, or energy result with the correct formula shown on the page.

Formula used: W = A x 120 x PF. Example: 15 A at 120 V equals 1,800 W at PF 1.00.

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Enter values and press calculate.

How 120V Calculator Works

120V Calculator uses W = A x 120 x PF to calculate 120 volt outlet, breaker, and appliance planning. The tool separates current, voltage, real power, apparent power, and power factor so the result is easier to use for electrical planning.

Use the result for early sizing of circuits, power supplies, solar equipment, generators, LED drivers, speaker amplifiers, and appliance loads. For safety-critical electrical work, verify conductor ampacity, breaker size, derating, and local code requirements before installation.

InputsAmps, watts, volts, PF FormulaW = A x 120 x PF OutputUsable result

120V Calculator FAQ

What is

120V Calculator is an electrical calculator for 120 volt outlet, breaker, and appliance planning. It uses W = A x 120 x PF and returns a planning result based on the input values.

What values do I need?

Most calculations need amps, watts, volts, and power factor. Some pages also use kVA, megawatts, hours, or energy rate depending on the calculator type.

Can I use this result for wiring or breaker selection?

Use the result for planning. Confirm final wiring, breaker sizing, voltage drop, conductor temperature rating, and local electrical code requirements with a qualified electrician or engineer.