Ohm’s Law Calculator

Enter any two known values and press “Calculate” to solve for the others:

Ohm’s Law Formula Wheel

Ohms law formula wheel

Calculation Formulas for Ohm’s Law

TaskFormula Example
1Calculate current (I) from voltage (V) and resistance (R)I = V / RI = 60V / 12Ω = 5A
2Calculate current (I) from power (P) and voltage (V)I = P / VI = 300W / 60V = 5A
3Calculate current (I) from power (P) and resistance (R)I = √ P / RI = √ 300W / 12Ω = 5A
4Calculate power (P) from voltage (V) and current (I) P = V * IP = 60V * 5A = 300W
5Calculate power (P) from current (I) and resistance (R)P = I2 * RP = 5A2 * 12Ω = 300W
6Calculate power (P) from voltage (V) and resistance (R)P = U2 / RP = 60V2 / 12Ω = 300W
7Calculate resistance (R) from voltage (V) and current (I)R = V / IR = 60V / 5A = 12Ω
8Calculate resistance (R) from power (P) and voltage (V)R = V2 / PR = 60V2 / 300W = 12Ω
9Calculate resistance (R) from power (P) and current (I)R = P / I2R = 300 / 5A2 = 12Ω
10Calculate voltage (V) from current (I) and resistance (R)V = I * RV = 5A * 12Ω = 60V
11Calculate voltage (V) from power (P) and current (I)V = P / IV = 300W / 5A = 60V
12Calculate voltage (V) from power (P) and resistance (R)V = P * RV = √ 300W * 12Ω = 60V

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