Learn physics with interactive calculators, comprehensive articles, and clear explanations. From Newton's Laws to thermodynamics — completely free for US students.
Interactive tools to solve physics problems instantly
Calculate range, height, and time of flight for any launch angle and speed.
Solve for force, mass, or acceleration using Newton's Second Law.
Calculate momentum, solve collision problems, and analyze impulse.
Find wave speed, frequency, or wavelength using v = fλ.
Calculate KE = ½mv² and PE = mgh for any object.
Calculate gravitational force between any two masses.
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Don't just read about physics — use our tools to solve real problems instantly. Perfect for homework and exam prep.
We explain physics the way a great teacher would — building intuition first. Targeted at US high school and college students.
Clear, in-depth explanations of physics fundamentals
The most essential equations in physics fundamentals
In-depth explanations of physics fundamentals — all free, all accessible
Interactive physics tools — all free, no account needed. Solve real physics problems instantly.
Calculate range, maximum height, and time of flight for any projectile.
Solve for force, mass, or acceleration using Newton's Second Law.
Calculate momentum and analyze perfectly inelastic collisions.
Calculate kinetic energy, gravitational potential energy, and spring PE.
Solve for any variable in the fundamental wave equation.
Calculate the gravitational force between any two objects.
Solve for pressure, volume, moles, or temperature.
Find time to fall, final speed, and distance fallen under gravity.
Solve for voltage, current, or resistance in electrical circuits.
Calculate electrical power using current, voltage, or resistance.
Calculate work done by a force at any angle, or power from work and time.
Calculate the torque produced by a force applied at a distance from a pivot.
Find centripetal force, acceleration, period, and frequency for circular motion.
Calculate period, frequency, and energy for springs and simple pendulums.
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly.
Solve for density, mass, or volume using the density equation.
Calculate pressure, force, or area from any two known quantities.
Calculate impulse using force × time or change in momentum.
Calculate buoyant force and check if an object floats or sinks.
Find image distance, magnification, and image type for lenses and mirrors.
Calculate the escape velocity needed to leave any planet's gravity.
Find orbital speed and period for any circular orbit around a central body.
Solve for heat transferred, mass, specific heat, or temperature change.
Calculate the efficiency of any energy conversion process.
Calculate total resistance for resistors in series or parallel circuits.
Calculate the observed frequency shift when source or observer is moving.
Calculate friction force on flat surfaces or inclines.
Solve for any SUVAT variable given any three known values.
Calculate refraction angle using Snell's Law. Detects total internal reflection.
Read our in-depth articles on every topic covered by these calculators.
Every essential formula organized by topic — bookmark for quick reference
Use these formulas with our interactive tools to solve real physics problems instantly.
A free, comprehensive physics resource designed for US high school and college students.
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11+ comprehensive articles covering projectile motion, Newton's laws, thermodynamics, waves, gravity, and more.
9 fully functional physics calculators — all solving real problems with step-by-step results.
A complete formula reference covering mechanics, kinematics, waves, energy, gravity, and thermodynamics.
Aligned with AP Physics 1, AP Physics 2, and introductory college physics. Targeted at US students.
Motion, forces, speed, acceleration, energy basics, and simple experiments for beginners.
Newton's laws, momentum, gravitation, waves, and basic electricity with solved examples.
Projectile motion, thermodynamics, formulas, graph-based problems, and deeper concept practice.
Advanced mechanics, energy conservation, circular motion, electromagnetism, and exam revision support.
Every single resource on Physics Fundamentals is and will always be completely free. No premium tier. No early access. No subscription. No email signup. Just open physics education for every student.
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