Which topics are covered?

Mechanics (velocity, acceleration, force, momentum, energy, work, power, projectile motion), waves (speed and period), thermodynamics (heat), optics (thin lens equation and magnification) and relativity (E = mc², time dilation, length contraction).

What units should I use?

SI units throughout: meters, seconds, kilograms, joules, watts, hertz. Inputs are labeled with their unit and results carry the correct derived unit.

How is projectile motion computed?

With the standard flat-ground, no-drag equations: range = v² sin(2θ) ÷ g, flight time = 2v sin(θ) ÷ g and peak height = v² sin²(θ) ÷ 2g.

Are relativity results accurate?

Yes - time dilation and length contraction use the exact Lorentz factor γ = 1 ÷ √(1 − β²) with β as a fraction of the speed of light.

Physics Calculator - Mechanics, Waves, Optics & Relativity

Sixteen physics formulas with step-by-step working: kinematics, forces, energy, power, waves, heat, lenses and even E = mc² and time dilation.

Inputs

Results

Enter your values - results update instantly.

How This Was Calculated

Assumptions

Recent Calculations

From Homework Kinematics to Relativity

AiLoveKit's physics calculator covers the formulas students and engineers reach for most: speed-distance-time, uniformly accelerated motion, Newton's second law, momentum, kinetic and potential energy, work, mechanical power and full projectile motion - then waves, heat capacity, the thin lens equation and the famous relativistic results.

Every Step Written Out

Step-by-step - intermediate quantities (flight time, peak height, image distance) appear alongside the main result.
Proper units - results carry joules, watts, pascals, meters per second and more, never bare numbers.
Instant - change any input and the solution rewrites itself immediately.

Working with circuits as well? Continue to the Electrical Calculator for Ohm's law, power and resistor networks.