Joules as the base
Every listed unit is converted through joules. One watt-hour equals 3600 joules.
Calories
This page labels the thermochemical calorie and kilocalorie. Food Calories are commonly kilocalories.
Energy versus power
Energy measures an amount transferred or stored, while power measures the rate at which energy is transferred.
Frequently asked questions
Does conversion happen in my browser?
Yes. These value conversions run in the browser and do not require an account.
Should I verify a critical conversion?
Yes. For engineering, laboratory, medical, financial, legal, or safety-critical work, verify the unit definition and result against an authoritative standard for your context.