Ohm's Law Calculator
Calculate Voltage (V), Current (I), Resistance (R), and Power (P) by entering any two known parameters.
Enter any 2 values to calculate remaining values
Calculated Values:
Voltage (V):
0.000 V
Current (I):
0.000 A
Resistance (R):
0.000 Ω
Power (P):
0.000 W
How to Use
- Enter any two known values among Voltage, Current, Resistance, or Power.
- Click CALCULATE to compute the remaining two variables.
- Use the Copy Values button to easily paste the findings into your schematic notes.
Ohm's Law Core Relationships
Voltage: V = I × R (Electrical potential difference)
Current: I = V / R (Rate of electric charge flow)
Resistance: R = V / I (Opposition to electrical current)
Power: P = V × I = I² × R = V² / R (Rate of energy consumed)
Ohm's Law Formula Wheel
Ohm's Law Formula Table
| To Find | Known Values | Formula |
|---|---|---|
| Voltage (V) | Current (I) & Resistance (R) | V = I × R |
| Voltage (V) | Power (P) & Current (I) | V = P / I |
| Voltage (V) | Power (P) & Resistance (R) | V = √(P × R) |
| Current (I) | Voltage (V) & Resistance (R) | I = V / R |
| Current (I) | Power (P) & Voltage (V) | I = P / V |
| Current (I) | Power (P) & Resistance (R) | I = √(P / R) |
| Resistance (R) | Voltage (V) & Current (I) | R = V / I |
| Resistance (R) | Voltage (V) & Power (P) | R = V² / P |
| Resistance (R) | Power (P) & Current (I) | R = P / I² |
| Power (P) | Voltage (V) & Current (I) | P = V × I |
| Power (P) | Current (I) & Resistance (R) | P = I² × R |
| Power (P) | Voltage (V) & Resistance (R) | P = V² / R |
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