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Electronics Engineering

True Power Calculator

Electronics Engineering

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True Power

Equation and meaning

\[P = I ^ ( 2 ) \cdot R\]

Use this equation when the shown variables describe your problem. Keep all inputs in compatible units; the calculator converts them to SI internally before solving.

Variables in this formula

I — Current
Electric current SI unit: A
P — Power
Power SI unit: W
R — Resistance
Electrical resistance SI unit: Ω

How to use this calculator

  1. Leave one value emptyThe empty field is automatically treated as the unknown.
  2. Enter known values and unitsChoose N, kgf, dyn, SI or another compatible unit when available.
  3. Review the automatic answerThe result appears immediately and is substituted back into the formula to check the residual.
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