Physics Formulas & Equations

Physics Formulas is a clear reference of physics formulas and equations for high school and first-year university: 264 formulas in 61 topics, explained with symbols, SI units, diagrams and worked examples.
From v = v₀ + at and ΣF = ma to V = IR and E₀ = mc², every physics equation is typeset cleanly, explained in plain language and works offline.

Every formula comes with a list of what each symbol means and its SI unit. The topic pages include worked examples with real numbers, practice questions with tap-to-reveal answers, and notes on common mistakes and sign conventions.

What you will learn

• Units and Constants: SI base and derived units, SI prefixes and unit conversion, vectors and components, and a table of physical constants with CODATA 2022 values from NIST
• Motion (Kinematics): motion in a straight line, the constant-acceleration equations, free fall and projectile motion
• Newton's Laws and Forces: Newton's laws of motion, weight, normal force, tension and springs, friction and inclined planes
• Work, Energy and Power: the work-energy theorem, potential energy, conservation of energy, power and efficiency
• Momentum and Collisions: momentum and impulse, elastic and inelastic collisions, center of mass
• Circular Motion and Gravitation: uniform circular motion, Newton's law of gravitation, orbits and escape speed
• Rotation: rotational kinematics, torque and equilibrium, moment of inertia, rotational energy and angular momentum
• Oscillations and Waves: simple harmonic motion, pendulums, wave basics, superposition and standing waves
• Sound: speed and intensity of sound, decibels, resonance in pipes, the Doppler effect and beats
• Fluids: density and pressure, buoyancy and Archimedes' principle, fluid flow and Bernoulli's equation
• Heat and Thermodynamics: temperature and thermal expansion, specific heat and phase changes, heat transfer, ideal gases and kinetic theory, the first and second laws of thermodynamics, heat engines
• Electrostatics: charge and Coulomb's law, electric field, electric potential, capacitors
• Electric Circuits: current, resistance and Ohm's law, resistors in series and parallel, EMF and Kirchhoff's rules, RC circuits, alternating current
• Magnetism and Induction: magnetic force, magnetic fields of currents, Faraday's law and Lenz's law, inductance and transformers
• Optics: reflection and refraction, plane and curved mirrors, thin lenses, interference and diffraction
• Modern Physics: photons and the photoelectric effect, matter waves and uncertainty, the Bohr atom and spectra, nuclei and binding energy, radioactive decay, special relativity

Features
• 264 physics formulas in 61 topics and 16 sections
• Every formula with its symbols and SI units
• 118 worked examples with step-by-step numbers
• 120 practice questions with tap-to-reveal answers
• 31 original diagrams: projectile paths, free-body diagrams, inclined planes, circuits, field lines, waves, lens and mirror ray diagrams, energy levels and more
• Physical constants table (CODATA 2022)
• Search all topics from the home screen
• Dark mode
• Works offline, no account needed
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia

Who it is for
• High school students revising physics formulas for tests and exams, including AP, A-level, IB and GCSE courses
• College and university students in introductory physics
• Teachers and tutors who want a reliable physics formula sheet with clear diagrams
• Anyone who needs to look up a physics equation and the meaning of its symbols quickly

Physics Formulas is an independent study aid. Content is checked against the OpenStax College Physics and University Physics textbooks and NIST CODATA reference data. It is not affiliated with any exam board, textbook publisher or standards body.