Watts to kilocalories per hour
Type a value in watts to see it in kilocalories per hour straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the watts box.
- Read the result in kilocalories per hour as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
kcal/h = W × 0.8598452279
Multiply the value in watts by 0.8598452279 to get kilocalories per hour.
Example
To convert 25 W to kilocalories per hour: 25 × 0.8598452279 = 21.4961 kcal/h.
Conversion table
| Watts (W) | Kilocalories per hour (kcal/h) |
|---|---|
| 1 | 0.859845 |
| 2 | 1.71969 |
| 3 | 2.57954 |
| 5 | 4.29923 |
| 10 | 8.59845 |
| 20 | 17.1969 |
| 25 | 21.4961 |
| 50 | 42.9923 |
| 100 | 85.9845 |
| 250 | 214.961 |
| 500 | 429.923 |
| 1,000 | 859.845 |
About the units
- Watt
- The SI unit of power, equal to one joule per second.
- Kilocalorie per hour
- A kilocalorie per hour, using the International Table calorie of 4.1868 joules, is exactly 1.163 watts and is used to rate boilers and heaters.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilocalories per hour are in one watt?
1 W = 0.859845 kcal/h exactly.
How do I convert watts to kilocalories per hour?
Use kcal/h = W × 0.8598452279. For example, 25 W = 21.4961 kcal/h.
How many watts are in one kilocalorie per hour?
1 kcal/h = 1.163 W.
What is the difference between mechanical and metric horsepower?
Mechanical horsepower is about 745.7 watts and is used in the US, while metric horsepower (PS) is 735.5 watts and is used in Europe and Japan. The same engine therefore shows a PS figure about 1.4% higher.
How many kilowatts is one ton of refrigeration?
One ton of refrigeration is 12000 BTU per hour, about 3.517 kW of cooling capacity. That is cooling output, not electricity use; the unit draws less power depending on its efficiency.