Physics is the law.
Everything else is opinion.
Free calculators, live simulations and applied guides that turn the laws of nature into better decisions — about your money, your home, your business and your life.
Popular calculators
Solve the equation, then see what it means in the real world. Every tool is free and instant.
Kinetic Energy
Calculate kinetic energy from mass and velocity (KE = ½mv²).
KE = ½ × m × v²Projectile Motion
Calculate the range, maximum height and flight time of a projectile from launch speed and angle.
R = v₀² · sin(2θ) / gNewton's Second Law
Calculate force from mass and acceleration with Newton's second law, F = ma.
F = m × aOhm's Law
Calculate current and power from voltage and resistance with Ohm's law (V = IR, P = V²/R).
I = V / R, P = V² / RElectricity Cost
Calculate what any appliance costs to run per day, month and year from its wattage, daily hours and your electricity price.
Cost = (W / 1000) × hours × price per kWhTorque
Calculate torque from force, lever arm length and angle.
τ = r × F × sin(θ)Momentum
Calculate momentum from mass and velocity (p = mv).
p = m × vFree Fall
Calculate how long an object takes to fall from a given height and how fast it hits the ground.
t = √(2h/g), v = √(2gh)Use physics in real life
Not another textbook. Applied guides that convert equations into saved money, saved time and sharper thinking.
Physics at home
A practical guide to using thermodynamics, levers and friction to save hours and hundreds of euros a year in an ordinary household.
Physics of money
Your energy bills are physics equations with price tags, and the deepest financial concepts — compounding, efficiency, entropy — behave like physical laws.
Physics for business
Bottlenecks are flow physics, UX friction is real friction, and the AI race is thermodynamics.
Why physics wins
It can't be negotiated
Markets change their minds. Trends reverse. Gravity, energy conservation and thermodynamics never do. Decisions built on physics stand on the only foundation that doesn't move.
It finds the money
Your electricity bill, your heating, your car, your commute — they're all physics problems with price tags. Compute them and the biggest savings reveal themselves in minutes.
It powers the AI age
Continued AI progress is thermodynamics: how efficiently energy becomes intelligence. The people, companies and countries that use physics best will win it. You can engineer around almost anything — thermodynamics is not one of them.