Physics & Engineering Calculators

    Free physics calculators for Ohm's law, force and motion, and electrical circuits. Accurate formulas for students and engineers.

    3 Free Tools

    Ohm's Law

    Voltage, current, resistance & power

    Force & Motion

    Newton's laws & kinematics

    Electrical Circuit

    Series & parallel resistance

    Formula Guides

    How to Use Ohm's Law — Voltage, Current & Resistance

    How to Calculate Force, Acceleration & Motion (Newton's Laws)

    How to Calculate Series and Parallel Resistance