What this calculator does
Energy can be calculated in different ways depending on the situation. This calculator covers kinetic energy, electrical energy and heat energy.
Formula used
Kinetic energy equals one half mass times velocity squared. Electrical energy equals power times time. Heat energy equals mass times specific heat capacity times temperature change.
How to read the result
The headline result is shown in joules. Electrical energy is also shown in kilowatt hours because that is common on energy bills.
Assumptions
- Uses SI units.
- Electrical time is entered in hours.
- Heat calculation assumes no energy loss.
Sources and checks
This calculator uses a standard public formula. Where rules or thresholds can change, source links are listed on the relevant page.
Frequently asked questions
What is a kilowatt hour?
A kilowatt hour is the energy used by 1,000 watts running for one hour. It equals 3.6 million joules.