How to Calculate Ohm's Law – Voltage, Current & Resistance

Ohm's Law is the foundational equation of electrical engineering: Voltage equals Current times Resistance (V = IR). Named after German physicist Georg Ohm, this relationship describes how electrical current flows through a conductor in response to an applied voltage and the resistance it encounters. Whether you are designing circuits, troubleshooting electrical problems, or studying electronics

CalcPlanet – Free Online Calculators

725+ free calculators and 108 tools for math, money, health, and everyday life. Instant results, verified formulas, no sign-up.

· Reviewed against our Editorial Standards and Formula Sources.

CalcPlanet calculators are free, privacy-first, and formula-reviewed.

Editorial Standards · Formula Sources · Privacy · Terms · Contact