Energy Calculator
Enter mass, speed, height above your chosen zero level, and gravitational acceleration.
A QUICK WALKTHROUGH
How to use this tool
- Enter a positive mass and choose its unit.
- Enter nonnegative speed and height, choose units, and set gravity.
- Read each energy in J, kJ, and kcal.
Energy results
KE = ½mv²; PE = mgh; total = KE + PE. This classical model uses constant gravity and your chosen zero-height reference, ignoring rotation, drag, and other energy forms. Default g = 9.80665 m/s² is standard gravity, not a measurement of your location. 1 kcal = 4184 J (thermochemical).
GOOD TO KNOW
Common questions
What does zero height mean?
Choose a reference level where gravitational potential energy is zero. This tool accepts heights at or above that level; changing the reference changes PE and total energy.