Energy Converter

Convert energy units like Joules, Calories, kWh, and more.

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Energy Units

Joule (J): SI unit of energy.
Calorie (cal): Energy needed to heat 1g of water by 1°C. Often used in food (defined as kcal).
Kilowatt-hour (kWh): Energy delivered by 1kW of power for 1 hour.

Convert temperature between Celsius, Fahrenheit, and Kelvin.

Convert speed units like mph, km/h, m/s, and knots.

Convert time durations between seconds, minutes, hours, days, and weeks.