Instant physics answers with shown working
Every calculator on this page shows the formula used, substitutes your values step-by-step, and links to the full article explaining the physics. Not just answers — understanding.
What makes a good physics calculator
Most online calculators give you a number and nothing else. Every calculator here shows the equation first, substitutes your exact values, and walks through the arithmetic so you can see exactly how the answer was reached. If you're a student, that shown working is what helps the formula stick.
Each calculator also solves in every direction — not just "give me the output given the inputs." If you know kinetic energy and mass, you can solve for velocity. If you know force and acceleration, you can solve for mass. The triangles work in all directions.
Calculators by topic
Projectile Motion, Kinetic Energy, Newton's Second Law, Momentum, Circular Motion, SUVAT, Hooke's Law, Torque, Work & Power, Gravitational PE, Young's Modulus, Banked Curve, Terminal Velocity, Vector Addition, Impulse & Momentum
Wave Speed, Pendulum Period, Doppler Effect, Snell's Law, Double-Slit Interference, Refractive Index, Lens & Mirror Equation
Ohm's Law, Coulomb's Law, Resistors in Series & Parallel, Electric Field, Capacitor Energy, Magnetic Force, Faraday's Law, Electrical Power
Ideal Gas Law, Thermal Expansion, Combined Gas Law, Specific & Latent Heat
Free Fall, SUVAT Equations, Relative Velocity
Escape Velocity, Gravitational PE, Gravitational Field Strength
Half-Life & Radioactive Decay, Photoelectric Effect, de Broglie Wavelength, Bohr Energy Levels, Nuclear Binding Energy, Black-Body Radiation