Convert Calorie to Watt-hour
Type the number of calories that you wish to convert to watt-hours.
How to Convert Calories to Watt-hours
The calorie and watt-hour are both units of energy. 1 watt-hour equals 860.4206501 calories. This means to convert calories to watt-hours, you divide by 860.4206501.
Formula
Step-by-Step Example
Convert 5 cal to watt-hours:
We need to convert calories to watt-hours
Since 1 Wh = 860.4206501 cal, divide by 860.4206501
5 ÷ 860.4206501 = 0.0058111111
5 cal = 0.0058111111 Wh
Calorie to Watt-hour Conversion Table
Quick reference table for common calorie to watt-hour conversions. Click any value for detailed calculation.
| Calories (cal) | Watt-hours (Wh) |
|---|---|
| 0.1 cal | 0.0001162222 Wh |
| 0.5 cal | 0.0005811111 Wh |
| 1 cal | 0.0011622222 Wh |
| 2 cal | 0.0023244444 Wh |
| 5 cal | 0.0058111111 Wh |
| 10 cal | 0.0116222222 Wh |
| 25 cal | 0.0290555556 Wh |
| 50 cal | 0.0581111111 Wh |
| 100 cal | 0.1162222222 Wh |
About These Units
Calorie (cal)
A small calorie (cal) is the energy needed to raise 1 gram of water by 1°C, equal to 4.184 joules. Small calories are used in chemistry and physics. Note: food "Calories" (with capital C) are actually kilocalories. One calorie equals 0.003968 BTU.
Watt-hour (Wh)
A watt-hour (Wh) is the energy of one watt sustained for one hour, equal to 3,600 joules. Watt-hours measure battery capacity (smartphone: 10-15 Wh, laptop: 50-100 Wh) and small appliance energy use. One Wh equals 3.6 kilojoules.
Frequently Asked Questions
How do I convert calories to watt-hours?
To convert calories to watt-hours, divide the value by 860.4206501. For example, 10 cal = 0.0116222222 Wh.
How many watt-hours are in 1 calorie?
1 calorie equals 0.0011622222 watt-hours.
What is the formula for calories to watt-hours?
The formula is: Wh = cal ÷ 860.4206501.