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DC Electrical Power Calculator

Calculate DC electrical power. AC systems may require RMS values, phase information and power factor not represented here.

Enter your values

V
A

Use a decimal point, without thousands separators.

Example result
Power
24 W

The initial result uses the example values. Enter your own values and calculate again.

Edit inputs

How it works

Calculate DC electrical power. AC systems may require RMS values, phase information and power factor not represented here.

P = VI

Worked example

Show example inputs and result

Voltage: 12 · Current: 2.

Power
24 W

Questions and answers

Why are some results rounded?

Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.

Are my inputs sent to a server?

The calculator processes inputs in your browser. Its code does not send your values to a server.

Method reviewed: October 8, 2026 · Methods & accuracy

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