Watt-Hour to Calorie (th) Converter
Convert Watt-Hour (Wh) to Calorie (th) (cal) instantly. 1 Wh = 860.42065 cal.
Energy Converter
27 units available
1 Wh = 860.42065 cal
Formula:
cal = Wh × 860.4206500956With your value: 1 Wh = 860.4206501 cal
How big is that?
Everyday references on a logarithmic scale, all expressed in watt-hour so you can sanity-check the result.
Other Watt-Hour to Calorie (th) conversions
Watt-Hour to Calorie (th) Conversion Table
| Watt-Hour (Wh) | Calorie (th) (cal) |
|---|---|
| 0.5 | 430.210325 |
| 1 | 860.42065 |
| 2 | 1,720.8413 |
| 5 | 4,302.10325 |
| 10 | 8,604.206501 |
| 15 | 12,906.309751 |
| 20 | 17,208.413002 |
| 25 | 21,510.516252 |
| 50 | 43,021.032505 |
| 100 | 86,042.06501 |
| 250 | 215,105.162524 |
| 500 | 430,210.325048 |
| 1000 | 860,420.650096 |
Calorie (th) to Watt-Hour Conversion Table
| Calorie (th) (cal) | Watt-Hour (Wh) |
|---|---|
| 0.5 | 0.000581 |
| 1 | 0.001162 |
| 2 | 0.002324 |
| 5 | 0.005811 |
| 10 | 0.011622 |
| 15 | 0.017433 |
| 20 | 0.023244 |
| 25 | 0.029056 |
| 50 | 0.058111 |
| 100 | 0.116222 |
| 250 | 0.290556 |
| 500 | 0.581111 |
| 1000 | 1.162222 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Watt-Hour (Wh)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Calorie (th) (cal)
Energy
The thermochemical calorie is exactly 4.184 J.
The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Watt-Hour to Calorie (th)
To convert from Watt-Hour (Wh) to Calorie (th) (cal), multiply the value by 860.4206500956.
Formula: cal = Wh × 860.4206500956
Reverse: Wh = cal × 0.0011622222
Step-by-Step Example
- Start with your value in Watt-Hour. For example: 5 Wh
- Multiply by the conversion factor: 5 x 860.4206500956
- The result is: 4,302.10325 cal
About Watt-Hour
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: energy calculations, engineering and science, education.
About Calorie (th)
The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.
Common uses: chemistry, nutrition, heating.
Frequently Asked Questions
How many Calorie (th) are in 1 Watt-Hour?
There are exactly 860.4206500956 Calorie (th) in 1 Watt-Hour. This means the conversion factor from Watt-Hour to Calorie (th) is 860.4206500956.
What is the formula to convert Watt-Hour to Calorie (th)?
The formula to convert Watt-Hour to Calorie (th) is: cal = Wh × 860.4206500956. For example, to convert 10 Watt-Hour to Calorie (th), you would multiply 10 by 860.4206500956.
What is a Watt-Hour?
The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Calorie (th)?
The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.
What are the common uses of Watt-Hour?
The Watt-Hour is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Watt-Hour to Calorie (th) converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/watt_hour-to-calorie