MeasureCalc

Convert Calorie (cal) to Watt-hour (Wh)

Category: Energy

0.001162 wh

1 cal = 0.001162 wh

High-precision rounding: 6 decimals

How to convert calorie (cal) to watt-hour (wh)

Energy is the capacity to do work. Joules form the SI base; Wh/kWh align with metering and batteries; calories and BTU survive in nutrition and HVAC. Conversions bridge mechanical, thermal, and electrical perspectives.

This converter calculates Calorie (cal) to Watt-hour (Wh) values by using the correct conversion rule for the Energy category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

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Quick conversion table

Handy values for Calorie (cal) to Watt-hour (Wh). Click a value to open that exact result.

Calorie (cal) Watt-hour (Wh)
1 0.001162
0.5 0.000581
2.5 0.002906
10 0.011622

Conversion formula

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Common mistakes

  • Confusing calorie (cal) with kilocalorie (kcal) on nutrition labels.
  • Treating BTU definitions interchangeably without noting standard (IT vs other).

Unit facts

  • Calorie (cal): A small calorie (cal) heats 1 g of water by 1 °C; nutrition ‘Calorie’ means kilocalorie (kcal).
  • Watt-hour (Wh): Watt-hour (Wh) is energy used by 1 watt for 1 hour (3,600 J); used for batteries.

About Calorie (cal)

Calorie (cal)

Energy to raise 1 g of water by 1 °C; several legacy variants exist. In nutrition, ‘calorie’ often means kilocalorie.

History: Thermochemistry used multiple definitions; modern practice relates calories to joules (1 cal ≈ 4.184 J).

About Watt-hour (Wh)

Watt-hour (Wh)

Energy consumed by 1 W for 1 hour. Ubiquitous in batteries and electricity meters; 1 Wh = 3600 J.

History: Adopted in power systems because it mirrors billing intervals and storage capacities.

Frequently asked questions

How many Watt-hour (Wh) are in one Calorie (cal)?
1 Calorie (cal) equals 0.001162 Watt-hour (Wh).
Is Calorie (cal) to Watt-hour (Wh) conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Calorie (cal) to Watt-hour (Wh)?
Enter a value in Calorie (cal), choose Watt-hour (Wh) as the target unit, and the calculator will instantly return the result.

Convert Calorie (cal) to other units

Convert other units to Watt-hour (Wh)