Convert energy values between Joules, Calories, Kilocalories (kcal), and BTUs.
Energy is measured differently across different scientific fields and everyday contexts. Physicists use Joules, nutritionists use Kilocalories (often just called "Calories" on food labels), and HVAC technicians use BTUs for heating and cooling systems.
Our Energy Converter instantly translates values between all these systems. Whether you're calculating the energy output of an appliance or converting a food's kilojoules into calories, this tool provides precise conversions based on international standards.