Convert between metric energy units instantly
Convert J to kJ for food energy and scientific applications
Convert kJ to J for physics and chemistry calculations
Convert kJ to MJ for large-scale energy measurements
Convert MJ to kJ for energy consumption calculations
Convert J to kWh for electricity consumption
Convert kWh to J for scientific energy calculations
Convert kWh to MJ for comparing energy units
Convert MJ to kWh for electrical energy billing
Energy is the capacity to do work or produce heat. In the metric system, the standard unit of energy is the joule (J), which equals one newton-meter. Different applications use various scales of energy measurement:
Energy conversions are essential for understanding electricity bills, calculating food calories (1 calorie = 4.184 joules), and comparing different forms of energy consumption. One kWh represents the energy consumed by a 1,000-watt appliance running for one hour.