Ohm's Law & Electric Power Calculator

Q: What is Ohm's Law?

Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R): V = I × R.

Q: How is electrical power calculated using Ohm's Law?

Electrical power (P in Watts) is the rate at which electrical energy is transferred. It is calculated by P = V × I. By substituting Ohm's law, power can also be expressed as P = I² × R or P = V² / R.

Enter Any 2 Known Values

Voltage (V) • Volts

Current (I) • Amperes (A)

Resistance (R) • Ohms (Ω)

Power (P) • Watts (W)

⚡ Quick Academic Access

Essential Calculators & Student Solvers

Free, 100% client-side educational solvers, Sarkari image resizers, and academic converters

Explore All 385+ Solvers

Enter Any 2 Known Values

Formula Substitutions

Essential Calculators & Student Solvers

📷 Photo, Sign & Docs

📊 GPA & Academic Scores

⚡ STEM & Science Solvers

🎯 Health & Statistics