Energy Calculator
Calculate kinetic energy, potential energy, work, and power using fundamental physics formulas.
Why & What
Energy is the capacity to do work. It exists in many forms and can be converted from one form to another, but the total energy in a closed system remains constant (conservation of energy).
Kinetic Energy (KE): Energy of motion. Potential Energy (PE): Stored energy due to position. Work (W): Energy transferred by a force. Power (P): Rate of doing work or transferring energy.
Formulas
KE = ½mv²
Kinetic Energy = half × mass × velocity squared
PE = mgh
Gravitational Potential Energy = mass × gravity × height
W = F × d × cos(θ)
Work = Force × distance × cosine of angle
P = W / t
Power = Work ÷ time
SI Units:
- Energy/Work: Joule (J) = kg⋅m²/s²
- Power: Watt (W) = J/s
Kinetic Energy Calculator
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Potential Energy Calculator
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Work Calculator
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Power Calculator
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Examples
Kinetic Energy
A 1000 kg car moving at 20 m/s:
KE = ½ × 1000 × 20² = 200,000 J (200 kJ)
Potential Energy
A 50 kg object at 10 m height:
PE = 50 × 9.81 × 10 = 4,905 J
Power
A motor does 5000 J of work in 10 seconds:
P = 5000 / 10 = 500 W
Limitations & Disclaimer
Important Limitations
- These formulas use classical (Newtonian) mechanics.
- Kinetic energy formula is non-relativistic (not valid near light speed).
- Potential energy assumes uniform gravitational field.
- Work formula assumes constant force.
- Does not account for energy losses (friction, heat).
- For educational purposes only.