Frequently Asked Questions
What is the relationship between joules and calories?
One calorie (cal) equals approximately 4.184 joules (J). The food calorie (kcal or kilocalorie) used in nutrition equals 1,000 small calories.
How do I convert kWh to joules?
One kilowatt-hour (kWh) equals 3,600,000 joules (3.6 MJ). kWh is the standard unit used for electricity billing.
What is a BTU?
A BTU (British Thermal Unit) is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit. One BTU is approximately 1,055 joules.
2026 international standards