⚡ Electrical Circuit Physics
Ohm's Law & Power Calculator
Enter any two known electrical values ($V$, $I$, $R$, or $P$) to automatically solve for the remaining parameters with unit scaling.
Enter Exactly Any Two Values:
V
A
Ω
W
Calculated Circuit Power ($P$)
36.00 W
Voltage ($V$)
12.00 V
12,000 mV
Current ($I$)
3.00 A
3,000 mA
Resistance ($R$)
4.00 Ω
0.004 kΩ
Power ($P$)
36.00 W
0.036 kW
💡 Formula Used:
$$I = \frac{V}{R} = \frac{12}{4} = 3\text{ A}, \quad P = V \times I = 12 \times 3 = 36\text{ W}$$
Ohm's Law & Joule's Law Wheel
The fundamental equations relating potential difference ($V$), current flow ($I$), electrical resistance ($R$), and power dissipation ($P$):
- Solving for Voltage: $$V = I \cdot R = \frac{P}{I} = \sqrt{P \cdot R}$$
- Solving for Current: $$I = \frac{V}{R} = \frac{P}{V} = \sqrt{\frac{P}{R}}$$
- Solving for Resistance: $$R = \frac{V}{I} = \frac{V^2}{P} = \frac{P}{I^2}$$
- Solving for Power: $$P = V \cdot I = I^2 \cdot R = \frac{V^2}{R}$$