Free online electrical calculator

Watts to Volts Calculator

Watts to volts requires current. The calculator solves voltage from power and amps, with optional AC power factor for realistic electrical load calculations.

Formula-based resultDC, AC, and battery referencesExamples and FAQFree online use

Watts to Volts Calculator

Enter the known electrical values. The result updates automatically.

Result updates automatically.

Formula: V = W / A

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How to Use the Watts to Volts Calculator

Watts to volts requires current. The calculator solves voltage from power and amps, with optional AC power factor for realistic electrical load calculations. Always use consistent RMS values for AC calculations and check equipment nameplates for exact rated values.

1200 W and 10 A

120 V

2400 W and 20 A

120 V

960 W, 10 A, PF 0.8

120 V

Electrical Formula Notes

This calculator uses the selected electrical formula and updates the result in real time. AC results depend on phase and power factor, while battery Wh to mAh results depend on voltage.

Main formulaV = W / A
Single-phase ACUse voltage and power factor for real power.
Three-phase ACUse line voltage and sqrt(3) where applicable.

Watts to Volts Calculator FAQ

Can electrical units always be converted directly?

No. Many electrical calculations require another value. For example, watts, amps, and volts are related, but you need at least two known quantities to solve the third.

When should I use power factor?

Use power factor for AC real-power calculations involving watts or kW. Pure DC and purely resistive AC loads can usually use a power factor of 1.

Are these results suitable for final electrical design?

Use them for estimating and reference. Final wiring, breaker sizing, and code compliance should be checked against local electrical standards and manufacturer ratings.