Energy Converter
Convert between different energy units including Joules, kilowatt-hours, calories, BTU, and more. Perfect for electrical calculations, nutrition planning, heating/cooling, and renewable energy applications.
Enter Energy Value
Common Energy Conversions
Energy Units & Applications Guide
Energy is the capacity to do work or produce heat. Different industries use various units, with Joules being the SI standard, kWh for electricity, calories for food, and BTU for heating/cooling.
Common Energy Units
Joule (J)
SI unit of energy, used in physics and engineering
Kilowatt-hour (kWh)
Electrical energy unit used in utility bills
Kilocalorie (kcal)
Food energy unit, often called "Calorie" on labels
British Thermal Unit (BTU)
Thermal energy unit for heating and cooling systems
Watt-hour (Wh)
Small electrical energy unit for batteries and devices
Conversion Factors
From | To | Multiply by |
---|---|---|
kWh | Joule | 3,600,000 |
kcal | Joule | 4,184 |
BTU | Joule | 1,055 |
kWh | kcal | 860 |
Therm | BTU | 100,000 |
Energy vs Power
- Energy: Total amount of work that can be done (kWh, Joules)
- Power: Rate of energy consumption (kW, Watts)
- Formula: Energy = Power × Time
- Example: 100W bulb × 10 hours = 1 kWh
Application Examples
Electrical
- • Utility bills
- • Solar systems
- • Battery storage
- • Electric vehicles
Nutrition
- • Food labels
- • Diet planning
- • Exercise calories
- • Metabolism
HVAC
- • Heating systems
- • Air conditioning
- • Insulation planning
- • Energy efficiency
Renewable
- • Solar panels
- • Wind turbines
- • Energy storage
- • Grid integration
Pro Tip
When comparing energy costs, convert everything to the same unit. For example, 1 kWh of electricity ≈ 860 kcal ≈ 3,412 BTU for direct energy comparison.
Energy Converter Answers
What does an energy converter do?
An energy converter allows you to quickly convert between different units of energy, such as joules, kilojoules, calories, kilocalories, watt-hours, and more.
Why are there so many energy units?
Different fields use different units — for example, physics uses joules, nutrition uses kilocalories, and electricity often uses kilowatt-hours. A converter helps bridge these unit systems easily.
Is this tool useful for real-world applications?
Yes. Whether you're measuring food energy, electrical usage, or mechanical work, this tool helps ensure accuracy in unit conversion across various scientific and practical tasks.
Does it support both metric and imperial units?
Absolutely. The energy converter supports a wide range of units from both the metric system (like joules and kilojoules) and non-metric systems (like BTUs or foot-pounds).