Ohm's law and power calculator
Enter exactly two non-negative quantities to calculate the remaining electrical values.
Equations
V = I × R I = V / R R = V / I
P = V × I = I²R = V²/R
Example: 5 V across 1 kΩ gives 5 mA and 25 mW. This ideal DC calculation excludes tolerances and temperature effects. All tools · Semiconductor hub