Ohm's Law and Power Calculator
Fill in any two boxes and leave the third blank. Works for DC and simple resistive loads.
Estimate only. This does not cover power factor or motor loads. Never take measurements on live gear without the right training and PPE.
Result
Fill in your numbers and hit Calculate.
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How the math works
V = I x R I = V / R R = V / I
P (watts) = V x I = I² x R = V² / RFree weekly email
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