1 calorie = 4.2 joule.
One small calorie is approximately 4.2 joules (so one large calorie is about 4.2 kilojoules). The factor used to convert calories to joules at a given temperature is numerically equivalent to the specific heat capacity of water expressed in joules per kelvin per gram (or per kilogram, for kilocalories).The 'Thermochemical calorie' was defined by Rossini simply as 4.1833 international joules in order to avoid the difficulties associated with uncertainties about the heat capacity of water.
Calorie equals 4.186 kilojoules (4.2 or simply 4 is close enough for a quick conversion). For example, a slice of bread supplies 290 kilojoules or (290 divided by 4) 70 Calories.By these definitions, 1 large calorie equals 1,000 small calories, as 1 kg equals 1,000 grams. ... Therefore, you don't need to convert them, as 1 kilocalorie equals 1 calorie in nutrition. Calories may also be expressed as kilojoules (kJ). One calorie (kcal) equals 4.18 kJ or 4,184 joules (J) ( 1 ).
A calorie is larger than a joule. There are about 4.8 joules in a calorie. But a Calorie is larger still! There are about 4,817 joules in a Calorie.Work is equal to the force that is exerted times the distance over which it is exerted. In equation form: work (joules) = force (newtons) x distance (meters), where a joule is the unit of work.