Watt-hours to 20 °C calories equation
To convert watt-hours to 20 °C calories:
Multiply
the number of watt-hours
by 860.832137733142
About 20 °C calories
One 20 °C calorie is the amount of energy needed to raise 1g of air-free water from 19.5 to 20.5°C at standard atmospheric pressure.