Ohm's Law Calculator
Solve for voltage, current, or resistance given any two of the three.
About this calculator
The Ohm's Law Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to solve for voltage, current, or resistance given any two of the three. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
V = I × R
What you'll need
- Voltage (V) — leave blank to solve for
- Current (A)
- Resistance (Ω)
What you'll get
- Voltage (V)
- Current (A)
- Resistance (Ω)
Formula
V = I × R
Result
Frequently Asked Questions
How do I use this? +
Enter any two values, leave the third blank. The calculator solves for the missing one.
Related Calculators
Acceleration Calculator
Calculate acceleration from initial velocity, final velocity, and time.
Force Calculator
Calculate force from mass and acceleration using Newton's second law.
Kinetic Energy Calculator
Calculate the kinetic energy of a moving object.
Potential Energy Calculator
Calculate gravitational potential energy at a given height.
Work Done Calculator
Calculate work done by a constant force over a displacement.