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© 2026 WattQuick. All calculators are estimates—for planning only, not professional engineering advice.

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Power

Amps to Watts

Convert current (amps) and voltage into power (watts).

CurrentA

VoltageV

Power

Enter amps and voltage

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About Amps to Watts

Amps to watts formula

Power in watts equals current times voltage: W = A × V. A 10 A draw at 12 V is 120 W.

Sizing batteries and UPS

Once you know load watts, use the Battery Runtime or UPS Runtime calculators to estimate how long your system will last.

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