Power Dissipation Calculator
Calculate power dissipated by a component from voltage and current.
V
A
Power Dissipated
0.5000 W
Power (mW)500.00 mW
Power Dissipated vs Voltage Across Component
Power Dissipation
P = V x I
Also: P = I^2 x R and P = V^2 / R.
All forms are equivalent via Ohm's Law.
Example Calculation
5 V across a component at 100 mA.
- 01P = 5 x 0.1 = 0.5 W = 500 mW
- 02Ensure component is rated above 0.5 W.
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Ohm's Law Guide
A complete guide to Ohm's Law. Learn the relationship between voltage, current, and resistance, with practical examples, the power triangle, and circuit analysis tips.