joule
J
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energy
Energy Conversions
Convert energy units including joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, electronvolts, and therms.
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Common Questions
Is a food Calorie different from a calorie?
Yes. A food Calorie is a kilocalorie, so 1 Calorie equals 1000 small calories.
What is a watt-hour?
A watt-hour is energy from using one watt of power for one hour. It equals 3600 joules.
Which BTU definition is used?
Energy conversions use the International Table BTU as noted in the category assumptions.
Show all 9 units
joule
J
kilojoule
kJ
calorie
cal
kilocalorie
kcal, Cal
watt-hour
Wh
kilowatt-hour
kWh
British thermal unit
BTU
electronvolt
eV
therm
thm
Acceleration
9 units ready
Angle
8 units ready
Area
10 units ready
Data Storage
10 units ready
Density
12 units ready
Dynamic Viscosity
11 units ready
Electric Charge
12 units ready
Electric Current
10 units ready
Electric Potential
8 units ready
Electrical Capacitance
8 units ready
Electrical Conductance
9 units ready
Electrical Inductance
8 units ready
Electrical Resistance
8 units ready
Energy
9 units ready
Flow Rate
12 units ready
Force
10 units ready
Fuel Economy
8 units ready
Illuminance
6 units ready
Kinematic Viscosity
8 units ready
Length & Distance
9 units ready
Luminance
8 units ready
Magnetic Field Strength
7 units ready
Magnetic Flux
7 units ready
Magnetic Flux Density
9 units ready
Power
8 units ready
Pressure
8 units ready
Radio/Wavelength
8 units ready
Speed
5 units ready
Temperature
3 units ready
Time
9 units ready
Torque
8 units ready
Volume
11 units ready
Weight and Mass
8 units ready
No matching categories
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