How many calories are in 1 watt-hour?

1 watt-hour equals 860.421 cal.

How do I convert calories back to watt-hours?

Use the reverse converter: 1 calorie equals 0.00116222 Wh.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert watt-hours to calories, multiply the value by 860.42065.

cal = Wh × 860.42065

25 Wh × 860.42065 = 21510.52 cal

Watt-hour (Wh): Used for battery capacity. Equal to 3,600 joules.
Calorie (cal): The thermochemical calorie is exactly 4.184 joules, historically the heat to warm one gram of water by 1 °C.

How do I convert watt-hours to calories?: To convert watt-hours to calories, multiply the value by 860.42065.
How many calories are in 1 watt-hour?: 1 watt-hour equals 860.421 cal.
How many calories are in 10 watt-hours?: 10 Wh equals 8604.21 cal.
How do I convert calories back to watt-hours?: Use the reverse converter: 1 calorie equals 0.00116222 Wh.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.