Electrical Power Calculator

Calculate electrical power, voltage, current or resistance using basic circuit relationships.

InputsChange a value to recalculate instantly

Voltage

Current

ResultUpdates as you type

Electrical power24 W

Voltage12 V

Current2 A

How it worksTransparent math

FormulaP=VI

For a DC resistive load, power is voltage times current.

Result breakdownSee the important numbers together

1Electrical power24 W

2Voltage12 V

3Current2 A

λ DooMathWork with this calculation

Local · deterministic · optional

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Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Electrical Power Calculator

Calculate electrical power, voltage, current or resistance using basic circuit relationships.

01Set inputsChoose values, units and assumptions.

02Apply the modelP = VI = I²R = V²/R

03Read the resultCheck the output against the assumptions before using it.

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Calculate electrical power, voltage, current or resistance using basic circuit relationships.

functions

P = VI = I²R = V²/R

fact_check

Review the inputs, units and assumptions before using the result for a real decision.