Why use this calculator
Energy calculations are fundamental to physics and engineering. Understanding kinetic, potential, and work-energy relationships is essential for solving real-world problems.
How to use it
Select the energy type, then enter mass/force and velocity/height/distance. Results are shown in Joules.
The formula
KE = ½mv². PE = mgh (g = 9.81 m/s²). W = F × d.
Worked examples
10 kg object at 5 m/s
125 Joules of kinetic energy
When people use it
- Physics problems
- Engineering design
- Energy efficiency analysis
Tips
- Energy is conserved — KE + PE = constant (in ideal systems)
- 1 Joule = 1 Newton-meter
- Power = Energy / Time
Questions people ask
- What is the relationship between work and energy?
- Work is the transfer of energy. When a force acts over a distance, it does work, which changes the energy of the system. They share the same units (Joules).