Energy Converter
Convert between joules, calories, BTU, kWh, and other energy units
Common Energy Conversions
Energy in Everyday Life
Lightning Bolt
≈ 5 billion joules (1.4 MWh)
Food Calorie
1 dietary calorie = 4,184 joules
Car Fuel
1 gallon gasoline ≈ 132 MJ
Smartphone Battery
≈ 50 Wh (180,000 joules)
About Energy Measurement
Energy is the capacity to do work or cause change. It's measured in joules (J) in the SI system, though many other units are used in different contexts. Energy conversion calculations are fundamental in physics, engineering, nutrition, and energy management systems.
Common Applications
- • Electrical energy consumption (kWh)
- • Food and nutrition (calories)
- • Fuel energy content (BTU, MJ)
- • Battery capacity and storage
- • Physics and engineering calculations
- • Environmental impact assessment
Energy Forms
- • Kinetic: energy of motion
- • Potential: stored energy
- • Chemical: energy in bonds
- • Electrical: energy from electron flow
- • Thermal: heat energy
- • Nuclear: atomic energy
Energy Conservation
According to the law of conservation of energy, energy cannot be created or destroyed, only converted from one form to another. Understanding energy units helps in calculating efficiency, planning energy usage, and designing sustainable systems. 1 kWh of electrical energy equals 3.6 MJ.
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