Ohm's Law Calculator
Voltage / Current / Resistance
Enter any two values to calculate the third (V = I × R)
Formula
V = I × R | P = V × I | I = V / R | R = V / I
Frequently Asked Questions
What is Ohm's Law?
V = I × R. Voltage (V, volts) = Current (I, amps) × Resistance (R, ohms). Power (W, watts) = V × I. It describes the relationship between voltage, current, and resistance in a circuit.
You may also need
~
Electricity Cost Calculator
Free electricity cost calculator. Estimate how much an appliance costs to run per day, month, and year based on wattage and electricity rate.
Everyday+
Scientific Calculator
Free online scientific calculator. Calculate trigonometric functions, logarithms, powers, roots, and factorials instantly.
MathR
Unit Converter
Free unit converter. Convert between metric and imperial units for length, weight, and temperature. Instant results, no signup required.
Conversion