Acceleration Calculator Calculate acceleration, final velocity, initial velocity, or time using a = (v − u) / t, with units and steps.
Angular Velocity Calculator — ω = Δθ/Δt How fast something spins: angle swept per unit time.
Buoyant Force Calculator — F_b = ρVg Archimedes' upward force on a submerged object (water: ρ = 1000 kg/m³).
Capacitance Calculator — C = Q/V Capacitance from stored charge and voltage, or solve for Q or V.
Carnot Efficiency Calculator — η = 1 − Tc/Th The maximum possible efficiency of any heat engine.
Centripetal Acceleration Calculator — a = v²/r The inward acceleration that keeps objects moving in circles.
Doppler Effect Calculator — f′ = fv/(v − vₛ) Observed frequency when a sound source moves toward you (v = 343 m/s built in).
Electric Field Strength Calculator — E = F/q Field strength from force on a test charge, or solve for F or q.
Electric Potential Calculator — V = kq/r Voltage at a distance from a point charge (k = 8.988×10⁹ built in).
Electrical Power Calculator Electrical power calculator: solve P = IV for power, current, or voltage with steps.
Escape Velocity Calculator — v = √(2GM/r) The speed needed to break free of a planet's gravity forever.
Flow Rate Calculator — Q = Av Volume flow rate from pipe area and fluid speed.
Free Fall Calculator Free-fall calculator: find fall time, drop height, or impact velocity. Full steps with units.
Friction Force Calculator Friction force calculator: solve f = μN for friction, coefficient, or normal force.
Gravitational Force Calculator — F = Gm₁m₂/r² Newton's law of universal gravitation: force between any two masses.
Half-Life Calculator — N = N₀(½)^(t/h) Remaining quantity after radioactive decay, or solve for time or half-life.
Heat Transfer Calculator — Q = mcΔT Heat needed to change an object's temperature.
Ideal Gas Law Calculator Ideal gas law calculator: solve PV = nRT for pressure, volume, moles, or temperature (kelvin).
Impulse Calculator — J = FΔt Impulse: force applied over time, equal to change in momentum.
Kinetic Energy Calculator Kinetic energy calculator: solve KE = ½mv² for energy, mass, or velocity with steps.
Lens Equation Calculator Lens equation calculator: solve 1/f = 1/do + 1/di for focal length, object or image distance.
Lens Magnification Calculator — m = −dᵢ/dₒ Magnification from image and object distances, with sign convention explained.
Magnetic Force Calculator — F = qvB sin θ Lorentz force on a moving charge in a magnetic field.
Momentum Calculator Momentum calculator: solve p = mv for momentum, mass, or velocity with steps.
Newton's Second Law Calculator (F = ma) Newton's second law calculator: solve F = ma for force, mass, or acceleration with unit conversion.
Ohm's Law Calculator Ohm's law calculator: solve V = IR for voltage, current, or resistance with unit conversion.
Orbital Velocity Calculator — v = √(GM/r) The speed needed to stay in a circular orbit around a planet or star.
Pendulum Period Calculator — T = 2π√(L/g) Period of a simple pendulum from its length (g = 9.81 m/s² built in).
Photoelectric Effect Calculator — KE = E − Φ Max electron kinetic energy from photon energy and work function.
Potential Energy Calculator Gravitational potential energy calculator: solve PE = mgh for energy, mass, or height.
Power Calculator Power calculator: solve P = W/t for power, work, or time with unit conversion.
Underwater Pressure Calculator — P = P₀ + ρgh Absolute pressure at depth in water (P₀ = 101,325 Pa, ρ = 1000 kg/m³ built in).
Projectile Range Calculator Calculate projectile range, launch speed, or launch angle with R = v₀²·sin(2θ)/g. Steps shown.
Radioactive Activity Calculator — A = λN Decays per second from decay constant and number of nuclei.
RC Time Constant Calculator — τ = RC How fast a capacitor charges or discharges through a resistor.
RMS Molecular Speed Calculator — v = √(3kT/m) Average speed of gas molecules from temperature (k = 1.380649×10⁻²³ built in).
Snell's Law Angle Calculator — n₁sin θ₁ = n₂sin θ₂ Refraction angle from indices and incidence angle, solved any way.
Sound Intensity Calculator — I = P/A Calculate sound intensity from acoustic power and area.
Speed and Velocity Calculator Calculate average speed, distance, or time with automatic unit conversion and step-by-step working.
Hooke's Law Calculator — F = kx Spring force from stiffness and stretch, or solve for k or x.
Spring-Mass Period Calculator — T = 2π√(m/k) Oscillation period of a mass on a spring.
Elastic Potential Energy Calculator — PE = ½kx² Energy stored in a stretched or compressed spring.
Standing Wave Frequency Calculator — fₙ = nv/2L Harmonic frequencies of a string or pipe fixed at both ends.
SUVAT Calculator — s = (u + v)t / 2 Find displacement from average velocity, or solve for any velocity or time.
SUVAT Displacement Calculator — s = ut + ½at² Calculate displacement, initial velocity, acceleration or time under constant acceleration.
SUVAT Calculator — v² = u² + 2as Relate velocities, acceleration and displacement without needing time.
SUVAT Velocity Calculator — v = u + at Find final velocity, initial velocity, acceleration or time for constant acceleration motion.
Torque Calculator — τ = rF sin θ Rotational force: lever arm, applied force and angle, solved any way.
Wave Equation Calculator (v = fλ) Wave equation calculator: solve v = fλ for wave speed, frequency, or wavelength.
Wave Period Calculator — T = 1/f Convert between a wave's period and its frequency.