Free online physics calculators for mechanics, kinematics, electricity, thermodynamics, optics, waves, and more. Accurate, instant results powered by proven formulas.
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Motion, force, acceleration, and Newton's laws.
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Velocity, displacement, acceleration, and projectile motion.
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Force, friction, momentum, and impulse.
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Work, energy, efficiency, and power.
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Gravitational force, escape velocity, and orbital motion.
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Torque, angular momentum, and rotational energy.
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Simple harmonic motion and pendulums.
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Frequency, wavelength, Doppler effect, and sound.
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Reflection, refraction, lenses, mirrors, and light.
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Voltage, current, resistance, and circuits.
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Magnetic fields, electromagnets, and induction.
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Heat, temperature, gas laws, and entropy.
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Pressure, buoyancy, viscosity, and flow rate.
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Relativity, quantum mechanics, and photons.
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Planets, stars, galaxies, and orbital mechanics.
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Convert force, energy, pressure, speed, and more.
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Scientific constants and reference calculators.
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Most used tools
Calculate force, mass, or acceleration using F = ma.
Solve SUVAT kinematics equations for motion.
Find displacement from initial velocity, acceleration, and time using s = ut + ½at².
Calculate final velocity using the equation v = u + at.
Calculate force, mass, or acceleration using Newton's second law F = ma.
Find the weight (gravitational force) of an object using W = mg.
Calculate work done using W = Fd cos θ.
Calculate kinetic energy using KE = ½mv².
Calculate gravitational force using F = Gm₁m₂/r².
Calculate g = GM/r² field strength.
Calculate angular velocity using ω = Δθ/Δt.
Calculate torque using τ = rF sin θ.
Compute displacement, velocity, and acceleration in simple harmonic motion.
Find the oscillation period of a mass on a spring using T = 2π√(m/k).
Compute wave speed from frequency and wavelength using v = fλ.
Find the speed of sound in air, water, steel, or other media.
Apply the thin lens equation 1/f = 1/v - 1/u to find unknown optical quantities.
Solve the mirror equation 1/f = 1/v + 1/u for concave and convex mirrors.
Apply Ohm's law V = IR to find voltage, current, or resistance.
Compute electrical power P = VI = I^2R = V^2/R for DC circuits.
Find the magnetic force on a moving charge using F = qvB sin θ.
Determine the force on a current-carrying wire using F = BIL sin θ.
Find heat energy using Q = mcΔT.
Solve for any variable using PV = nRT.
Solve Bernoulli's equation: P + ½ρv² + ρgh = constant.
Apply continuity equation using A₁v₁ = A₂v₂.
Convert mass to energy using Einstein's mass-energy equivalence E = mc².
Determine the Lorentz factor γ = 1/√(1 - v²/c²) for any velocity.
Find stellar luminosity L = 4πR²σT⁴ from radius and temperature.
Determine star temperature T = b/λ_max using Wien's displacement law.
Convert between Newtons, lbf, dynes, and kgf.
Convert between J, cal, eV, kWh, and BTU.
Calculate wavelength and frequency from the speed of light.
Calculate photon energy using E = hf.
Our physics calculators cover all major branches of physics, from classical mechanics and thermodynamics to modern physics and astrophysics. Each calculator uses verified formulas and provides instant, accurate results.
From Newton's laws of motion and kinematic equations to Ohm's law, thermodynamic processes, quantum mechanics, and stellar properties — our calculators help students, educators, and professionals solve physics problems quickly and accurately.
