Physics Calculator

A free online physics calculator for IGCSE, GCSE and A-Level students. Enter the values you know and get answers with clear, step-by-step working across mechanics, energy, forces, pressure, electricity and waves.

Equations you can solve

• Force — F = m × a
• Weight — W = m × g
• Kinetic energy — Eₖ = ½ m v²
• Potential energy — Eₚ = m g h
• Work done — W = F × d
• Power — P = E ÷ t
• Pressure — p = F ÷ A
• Density — ρ = m ÷ V
• Speed — v = d ÷ t
• Acceleration — a = Δv ÷ t
• Momentum — p = m × v
• Ohm's law — V = I × R
• Electrical power — P = I × V
• Wave speed — v = f × λ

Part of Physiworld — a free interactive physics learning platform with simulations, gamified lessons and exam-style quizzes for IGCSE, GCSE and A-Level. The calculator loads as an interactive app below.