Quick answer: Free physics calculators for motion, energy, electricity and waves. Solve problems with clear formulas and worked examples.
All Physics Calculators (6)
Kinetic Energy Calculator: KE = 1/2mv^2 →Free kinetic energy calculator: solve KE = 1/2mv2 for energy, mass or velocity, with unit conversion, everyday energy scales and relativistic limits.Physics
Projectile Calculator: Range, Height, Time →Free projectile motion calculator: find range, max height and time of flight from launch speed and angle. Formulas, vacuum vs air drag, and examples.PhysicsOhm's Law Calculator - V = IR →Free Ohm's Law calculator: solve V = IR for voltage, current, resistance or power P from any two values, with unit prefixes, formulas and worked examples.PhysicsWave Frequency Calculator: f=1/T, f=v/λ in Any Unit →Free wave frequency calculator: find frequency from wavelength or period, plus angular frequency. Formulas, EM spectrum table and examples.PhysicsMomentum Calculator: p=mv & Impulse Solver →Free momentum calculator: solve p=mv for missing values with mixed metric and imperial units, plus an impulse (F x t) mode. Instant physics answers.PhysicsDensity Calculator: Mass, Volume & Material →Free density calculator: solve for density, mass or volume in kg/m3, g/cm3, lb/ft3 and more, with material presets from air to gold. Instant, free.Physics
Frequently asked questions
Are these physics calculators free?
Yes, every physics calculator on this page is completely free with no sign-up required.
Which physics topics are covered?
Motion and energy (projectile range, height, time of flight; kinetic energy from mass and velocity), electricity (Ohm's law: voltage, current, resistance, power), and waves (frequency from wavelength or period).
Can I use these for homework?
Yes, each calculator shows the formula used and lets you change inputs to check your working step by step.
Do the calculators work on mobile?
Yes, all calculators are fully responsive and work on phones, tablets and desktops.