Energy Calculator
Convert energy units and calculate kinetic & potential energy
KE = ½mv² — Calculate kinetic energy from mass and velocity
PE = mgh — Calculate gravitational potential energy
// Energy Units
1 kWh = 3,600,000 J. 1 calorie = 4.184 J. 1 BTU = 1,055.06 J. Energy can be converted between all units without loss.
// Kinetic Energy
Kinetic energy is the energy of motion. Doubling velocity quadruples KE because it depends on v². That's why high-speed crashes are so dangerous.
// Potential Energy
Gravitational PE depends on mass, height, and gravity. On Earth g ≈ 9.81 m/s². On the Moon it's ~1.62 m/s², on Mars ~3.72 m/s².
// How to Use Online Energy Calculator
- Enter or paste your source data into the tool input.
- Click the primary action button to run Online Energy Calculator.
- Review the output, then copy or export your result.
// FAQ: What does Online Energy Calculator do?
Online Energy Calculator helps you convert energy units and calculate kinetic & potential energy in your browser with instant results.
// FAQ: How do I use Online Energy Calculator?
Paste or type your input, choose the needed action, and copy the generated output when the result is ready.
// FAQ: Is my data safe when using Online Energy Calculator?
Yes. Processing runs in your browser session for this page, so your content is not uploaded by this tool workflow.
// FAQ: Can I use Online Energy Calculator on mobile devices?
Yes. Online Energy Calculator works on modern mobile browsers, so you can run it from phones and tablets.