Calories to Kilowatt-hours Converter

To convert a measurement in calories to kilowatt-hours, multiply the value by 0.000001162222. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 cal to kilowatt-hours: 5 × 0.000001162222 = 0.000005811111 kWh.

A calorie (small calorie) is the energy needed to raise the temperature of one gram of water by one degree Celsius, defined as exactly 4.184 joules. The calorie originated in early-19th-century thermodynamics. The thermochemical calorie, fixed at exactly 4.184 J, is the modern standard, though it is often confused with the larger food Calorie (kilocalorie).

Common uses of calories include: Chemistry and thermodynamics; Heat-of-reaction measurements; Physics heat-transfer problems; Historical energy references.

A kilowatt-hour equals 1,000 watt-hours, or 3.6 million joules, and is the standard unit for billing electrical energy. The kilowatt-hour became the universal unit of electricity metering because it conveniently expresses household consumption. Running a 1,000-watt appliance for one hour uses exactly one kWh.

Common uses of kilowatt-hours include: Household electricity billing; Electric vehicle battery capacity; Home solar and battery systems; Energy audits and efficiency ratings.

Here are some common values converted:

1 cal = 0.000001162222 kWh 5 cal = 0.000005811111 kWh 10 cal = 0.000011622222 kWh 50 cal = 0.000058111111 kWh 100 cal = 0.000116222222 kWh