Energy tools
Convert between joules, calories, watt-hours and BTU. The most common trap: a food-label 'Calorie' is a kilocalorie, so it is 1,000 of the calories used in chemistry — a thousandfold difference.
About energy conversion
Energy has more competing units than almost any other quantity, because heat, electricity, food and mechanical work each developed their own. All of them reduce exactly to the joule.
All 72 energy tools
Joules to KilojoulesConvert joules to kilojoules: 1 J = 0.001 kJ. Free instant converter with the formula, a worked …Open →Joules to MegajoulesConvert joules to megajoules: 1 J = 1e-06 MJ. Free instant converter with the formula, a worked …Open →Joules to CaloriesConvert joules to calories: 1 J = 0.239006 cal. Free instant converter with the formula, a worke…Open →Joules to KilocaloriesConvert joules to kilocalories: 1 J = 0.000239006 kcal. Free instant converter with the formula,…Open →Joules to Watt HoursConvert joules to watt hours: 1 J = 0.000277778 Wh. Free instant converter with the formula, a w…Open →Joules to Kilowatt HoursConvert joules to kilowatt hours: 1 J = 2.77778e-07 kWh. Free instant converter with the formula…Open →Joules to British Thermal UnitsConvert joules to British thermal units: 1 J = 0.000947817 BTU. Free instant converter with the …Open →Joules to Foot PoundsConvert joules to foot pounds: 1 J = 0.737562 ft·lb. Free instant converter with the formula, a …Open →Kilojoules to JoulesConvert kilojoules to joules: 1 kJ = 1000 J. Free instant converter with the formula, a worked e…Open →Kilojoules to MegajoulesConvert kilojoules to megajoules: 1 kJ = 0.001 MJ. Free instant converter with the formula, a wo…Open →Kilojoules to CaloriesConvert kilojoules to calories: 1 kJ = 239.006 cal. Free instant converter with the formula, a w…Open →Kilojoules to KilocaloriesConvert kilojoules to kilocalories: 1 kJ = 0.239006 kcal. Free instant converter with the formul…Open →Kilojoules to Watt HoursConvert kilojoules to watt hours: 1 kJ = 0.277778 Wh. Free instant converter with the formula, a…Open →Kilojoules to Kilowatt HoursConvert kilojoules to kilowatt hours: 1 kJ = 0.000277778 kWh. Free instant converter with the fo…Open →Kilojoules to British Thermal UnitsConvert kilojoules to British thermal units: 1 kJ = 0.947817 BTU. Free instant converter with th…Open →Kilojoules to Foot PoundsConvert kilojoules to foot pounds: 1 kJ = 737.562 ft·lb. Free instant converter with the formula…Open →Megajoules to JoulesConvert megajoules to joules: 1 MJ = 1e+06 J. Free instant converter with the formula, a worked …Open →Megajoules to KilojoulesConvert megajoules to kilojoules: 1 MJ = 1000 kJ. Free instant converter with the formula, a wor…Open →Megajoules to CaloriesConvert megajoules to calories: 1 MJ = 239006 cal. Free instant converter with the formula, a wo…Open →Megajoules to KilocaloriesConvert megajoules to kilocalories: 1 MJ = 239.006 kcal. Free instant converter with the formula…Open →Megajoules to Watt HoursConvert megajoules to watt hours: 1 MJ = 277.778 Wh. Free instant converter with the formula, a …Open →Megajoules to Kilowatt HoursConvert megajoules to kilowatt hours: 1 MJ = 0.277778 kWh. Free instant converter with the formu…Open →Megajoules to British Thermal UnitsConvert megajoules to British thermal units: 1 MJ = 947.817 BTU. Free instant converter with the…Open →Megajoules to Foot PoundsConvert megajoules to foot pounds: 1 MJ = 737562 ft·lb. Free instant converter with the formula,…Open →Calories to JoulesConvert calories to joules: 1 cal = 4.184 J. Free instant converter with the formula, a worked e…Open →Calories to KilojoulesConvert calories to kilojoules: 1 cal = 0.004184 kJ. Free instant converter with the formula, a …Open →Calories to MegajoulesConvert calories to megajoules: 1 cal = 4.184e-06 MJ. Free instant converter with the formula, a…Open →Calories to KilocaloriesConvert calories to kilocalories: 1 cal = 0.001 kcal. Free instant converter with the formula, a…Open →Calories to Watt HoursConvert calories to watt hours: 1 cal = 0.00116222 Wh. Free instant converter with the formula, …Open →Calories to Kilowatt HoursConvert calories to kilowatt hours: 1 cal = 1.16222e-06 kWh. Free instant converter with the for…Open →Calories to British Thermal UnitsConvert calories to British thermal units: 1 cal = 0.00396567 BTU. Free instant converter with t…Open →Calories to Foot PoundsConvert calories to foot pounds: 1 cal = 3.08596 ft·lb. Free instant converter with the formula,…Open →Kilocalories to JoulesConvert kilocalories to joules: 1 kcal = 4184 J. Free instant converter with the formula, a work…Open →Kilocalories to KilojoulesConvert kilocalories to kilojoules: 1 kcal = 4.184 kJ. Free instant converter with the formula, …Open →Kilocalories to MegajoulesConvert kilocalories to megajoules: 1 kcal = 0.004184 MJ. Free instant converter with the formul…Open →Kilocalories to CaloriesConvert kilocalories to calories: 1 kcal = 1000 cal. Free instant converter with the formula, a …Open →Kilocalories to Watt HoursConvert kilocalories to watt hours: 1 kcal = 1.16222 Wh. Free instant converter with the formula…Open →Kilocalories to Kilowatt HoursConvert kilocalories to kilowatt hours: 1 kcal = 0.00116222 kWh. Free instant converter with the…Open →Kilocalories to British Thermal UnitsConvert kilocalories to British thermal units: 1 kcal = 3.96567 BTU. Free instant converter with…Open →Kilocalories to Foot PoundsConvert kilocalories to foot pounds: 1 kcal = 3085.96 ft·lb. Free instant converter with the for…Open →Watt Hours to JoulesConvert watt hours to joules: 1 Wh = 3600 J. Free instant converter with the formula, a worked e…Open →Watt Hours to KilojoulesConvert watt hours to kilojoules: 1 Wh = 3.6 kJ. Free instant converter with the formula, a work…Open →Watt Hours to MegajoulesConvert watt hours to megajoules: 1 Wh = 0.0036 MJ. Free instant converter with the formula, a w…Open →Watt Hours to CaloriesConvert watt hours to calories: 1 Wh = 860.421 cal. Free instant converter with the formula, a w…Open →Watt Hours to KilocaloriesConvert watt hours to kilocalories: 1 Wh = 0.860421 kcal. Free instant converter with the formul…Open →Watt Hours to Kilowatt HoursConvert watt hours to kilowatt hours: 1 Wh = 0.001 kWh. Free instant converter with the formula,…Open →Watt Hours to British Thermal UnitsConvert watt hours to British thermal units: 1 Wh = 3.41214 BTU. Free instant converter with the…Open →Watt Hours to Foot PoundsConvert watt hours to foot pounds: 1 Wh = 2655.22 ft·lb. Free instant converter with the formula…Open →Kilowatt Hours to JoulesConvert kilowatt hours to joules: 1 kWh = 3.6e+06 J. Free instant converter with the formula, a …Open →Kilowatt Hours to KilojoulesConvert kilowatt hours to kilojoules: 1 kWh = 3600 kJ. Free instant converter with the formula, …Open →Kilowatt Hours to MegajoulesConvert kilowatt hours to megajoules: 1 kWh = 3.6 MJ. Free instant converter with the formula, a…Open →Kilowatt Hours to CaloriesConvert kilowatt hours to calories: 1 kWh = 860421 cal. Free instant converter with the formula,…Open →Kilowatt Hours to KilocaloriesConvert kilowatt hours to kilocalories: 1 kWh = 860.421 kcal. Free instant converter with the fo…Open →Kilowatt Hours to Watt HoursConvert kilowatt hours to watt hours: 1 kWh = 1000 Wh. Free instant converter with the formula, …Open →Kilowatt Hours to British Thermal UnitsConvert kilowatt hours to British thermal units: 1 kWh = 3412.14 BTU. Free instant converter wit…Open →Kilowatt Hours to Foot PoundsConvert kilowatt hours to foot pounds: 1 kWh = 2.65522e+06 ft·lb. Free instant converter with th…Open →British Thermal Units to JoulesConvert British thermal units to joules: 1 BTU = 1055.06 J. Free instant converter with the form…Open →British Thermal Units to KilojoulesConvert British thermal units to kilojoules: 1 BTU = 1.05506 kJ. Free instant converter with the…Open →British Thermal Units to MegajoulesConvert British thermal units to megajoules: 1 BTU = 0.00105506 MJ. Free instant converter with …Open →British Thermal Units to CaloriesConvert British thermal units to calories: 1 BTU = 252.164 cal. Free instant converter with the …Open →British Thermal Units to KilocaloriesConvert British thermal units to kilocalories: 1 BTU = 0.252164 kcal. Free instant converter wit…Open →British Thermal Units to Watt HoursConvert British thermal units to watt hours: 1 BTU = 0.293071 Wh. Free instant converter with th…Open →British Thermal Units to Kilowatt HoursConvert British thermal units to kilowatt hours: 1 BTU = 0.000293071 kWh. Free instant converter…Open →British Thermal Units to Foot PoundsConvert British thermal units to foot pounds: 1 BTU = 778.169 ft·lb. Free instant converter with…Open →Foot Pounds to JoulesConvert foot pounds to joules: 1 ft·lb = 1.35582 J. Free instant converter with the formula, a w…Open →Foot Pounds to KilojoulesConvert foot pounds to kilojoules: 1 ft·lb = 0.00135582 kJ. Free instant converter with the form…Open →Foot Pounds to MegajoulesConvert foot pounds to megajoules: 1 ft·lb = 1.35582e-06 MJ. Free instant converter with the for…Open →Foot Pounds to CaloriesConvert foot pounds to calories: 1 ft·lb = 0.324048 cal. Free instant converter with the formula…Open →Foot Pounds to KilocaloriesConvert foot pounds to kilocalories: 1 ft·lb = 0.000324048 kcal. Free instant converter with the…Open →Foot Pounds to Watt HoursConvert foot pounds to watt hours: 1 ft·lb = 0.000376616 Wh. Free instant converter with the for…Open →Foot Pounds to Kilowatt HoursConvert foot pounds to kilowatt hours: 1 ft·lb = 3.76616e-07 kWh. Free instant converter with th…Open →Foot Pounds to British Thermal UnitsConvert foot pounds to British thermal units: 1 ft·lb = 0.00128507 BTU. Free instant converter w…Open →