Mechanics Calculators

Explore mechanics calculators for motion, forces and energy. Calculate free fall and projectile trajectories, apply Newton’s laws, work with momentum and torque, or investigate springs and pendulums.

Choose a calculator below and check its assumptions and units. These tools cover idealised models such as constant acceleration, frictionless motion and small-angle oscillation; individual calculators explain where their equations apply.

For chemistry, biology, astronomy and other physics topics, browse our Science & Research Tools.

Acceleration Conversion Calculator

Convert acceleration between m/s², g (Earth g), ft/s², in/s², Gal, mGal, µGal, km/h/s, mph/s, and knot/s. Instant, accurate, private (client-side).

Launch tool →

Ballistic Pendulum Calculator — Projectile Speed from Rise Height

Calculate projectile speed from projectile mass, pendulum mass and vertical rise height using momentum conservation and the ideal ballistic pendulum model.

Launch tool →

Centripetal Force Calculator

Centripetal force calculator for force, mass, speed, radius, acceleration, angular velocity, period, and RPM with automatic unit conversion.

Launch tool →

Coefficient of Restitution Calculator from Drop and Rebound Heights

Estimate the coefficient of restitution from drop and rebound heights, with a worked example and guidance on measuring a vertical bounce.

Launch tool →

Elastic Potential Energy Calculator

Calculate elastic potential energy, spring constant, or deformation using U = ½kx². Converts spring, length, and energy units with clear worked steps.

Launch tool →

Free Fall Calculator

Free fall calculator with units: solve for fall time, distance, impact speed, initial velocity, or gravity with steps, graph, and no-air-resistance assumptions.

Launch tool →

Gravity Calculator: Surface Gravity, Weight on Planets, and F = ma

Calculate surface gravity, weight on planets and moons, Newton's second law, and two-body gravitational force with units, steps, examples, and comparison cards.

Launch tool →

Impulse and Momentum Calculator

Impulse and momentum calculator for p = mv, J = FΔt, change in momentum, average force, contact time, and 2D or 3D momentum vectors.

Launch tool →

Kinetic and Potential Energy Calculator

Calculate kinetic energy, potential energy, mass, speed, height, gravity, and conservation of energy with unit conversions and worked solution steps. Client-side.

Launch tool →

Mass-Spring Oscillator Calculator (SHM) — Period, Frequency & Energy

Solve a mass-spring oscillator forward or backward for period, natural frequency, angular frequency, spring constant, mass, force, amplitude, or energy with unit conversion and steps.

Launch tool →

Moving Belt Travel Calculator

Calculate ideal belt travel per pulley revolution, belt speed and total travel from effective pulley diameter, pulley RPM and running time.

Launch tool →

Perfectly Inelastic Collision Calculator

Calculate the shared final velocity and kinetic energy lost when two objects collide and stick together in one dimension.

Launch tool →

Projectile Motion Calculator: Range, Height and Flight Time

Calculate projectile range, height, flight time, velocity, trajectory, target speed or target angles with steps. Supports SI and Imperial units.

Launch tool →

Rolling Without Slipping Calculator

Calculate translational, rotational and total kinetic energy for a rigid body rolling without slipping using mass, speed and its moment-of-inertia factor.

Launch tool →

Simple Pendulum Calculator – Period, Frequency, Length & Gravity

Solve a simple pendulum for period, frequency, length, or gravity with unit conversions, planetary presets, exact large-angle correction, and calculation steps.

Launch tool →

Torque & Moment of Inertia Calculator (τ = Iα)

Solve torque, mass moment of inertia, or angular acceleration; calculate force torque with an angle; and find inertia for common rigid-body shapes.

Launch tool →

Torque Calculator

Calculate torque, force, lever-arm distance, or angle with worked steps, presets, net torque, and conversions between N·m, lb-ft, in-lb, and more.

Launch tool →

Two-Body Center of Mass Calculator Along a Straight Line

Calculate the center of mass of two bodies along a straight line using their masses and signed positions.

Launch tool →

Work, Power and Energy Calculator

Calculate work, power, lifting energy, kinetic-energy change, and efficiency. Solve for any unknown with unit conversion, worked steps, and examples.

Launch tool →