Kinetic Energy Calculator
Calculate the energy of motion for any object with our physics-based calculator
Object Properties
Kinetic Energy Results
Classical Kinetic Energy
--
Joules (J)
Relativistic KE
--
Joules (J)
Equivalent Energy
--
TNT (kg)
Enter values to see how this energy compares to everyday objects.
Energy Breakdown
Your detailed energy analysis will appear here.
🚀 Kinetic Energy Examples
Running Human
70 kg person at 5 m/s: ~875 J
Moving Car
1500 kg car at 30 m/s: ~675 kJ
Commercial Jet
300,000 kg at 250 m/s: ~9.4 GJ
Electron in CRT
9.1×10⁻³¹ kg at 0.1c: ~4.1×10⁻¹⁶ J
Earth's Orbit
5.97×10²⁴ kg at 30 km/s: ~2.7×10³³ J
Nuclear Bomb
1 kg mass to 0.9c: ~1.2×10¹⁷ J
📝 Kinetic Energy Formulas
Classical (Newtonian)
KE = ½mv²
For non-relativistic speeds (v ≪ c)
Relativistic
KE = (γ - 1)mc²
Where γ = 1/√(1 - v²/c²)
Rotational
KE = ½Iω²
I = moment of inertia, ω = angular velocity
Dark Mode
Note: This calculator provides physics-based estimates. For relativistic calculations, we use the Lorentz factor γ = 1/√(1 - v²/c²) where c ≈ 299,792,458 m/s.