Unit Converter › Energy
scale · base joule
Energy converter
Joules, calories, watt-hours and BTU. 7 units, every one shown at once.
Convert
scale · base joule
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| Every unit at once | Value | Unit |
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which calorie
The Calorie on a food label is a kilocalorie — a thousand of the calories a physicist means. Both are listed so the factor of a thousand is never left implied.
Every energy pair
42 pages, one for each direction.
J → kJJ → calJ → kcalJ → WhJ → kWhJ → BTUkJ → JkJ → calkJ → kcalkJ → WhkJ → kWhkJ → BTUcal → Jcal → kJcal → kcalcal → Whcal → kWhcal → BTUkcal → Jkcal → kJkcal → calkcal → Whkcal → kWhkcal → BTUWh → JWh → kJWh → calWh → kcalWh → kWhWh → BTUkWh → JkWh → kJkWh → calkWh → kcalkWh → WhkWh → BTUBTU → JBTU → kJBTU → calBTU → kcalBTU → WhBTU → kWh
Other categories
Mass
Kilograms, pounds, stone, ounces and both tons.
Temperature
Celsius, Fahrenheit, kelvin and Rankine.
Length
Metric, imperial, and the nautical mile.
Volume
Litres, and US and Imperial measures kept apart.
Speed
km/h, mph, knots and metres per second.
Area
Square metres, feet, acres and hectares.
Time
Seconds through years, with the year defined.
Data
Decimal MB and binary MiB, kept apart.
Data rate
Megabits per second versus megabytes per second.
Pressure
Bar, psi, atmospheres and millimetres of mercury.
Power
Watts, and the two different horsepowers.
Angle
Degrees, radians, gradians and turns.
Frequency
Hertz, kilohertz, megahertz and RPM.
Force
Newtons, kilogram-force and pounds-force.
Torque
Newton-metres and pound-feet.
Fuel economy
mpg and L/100 km — where bigger means worse.
Density
kg/m³, g/cm³ and pounds per cubic foot.
Cooking
Spoons and cups, with the country stated.
Illuminance
Lux and foot-candles.