Horsepower to BTUs per Hour (hp to BTU/h) Converter
1 horsepower (hp) = 2,544.43 BTUs per hour (BTU/h). To convert horsepower to BTUs per hour, multiply by 2,544.43: 150 hp × 2,544.43 = 381,665 BTU/h.
Quick facts
- 1 hp = 2,544.43 BTU/h
- 1 BTU/h = 0.000393015 hp
- Formula: BTU/h = hp × 2,544.43
- Quick estimate: multiply by about 2544
How to convert horsepower to BTUs per hour
- Take the value in horsepower.
- Multiply it by 2,544.43 (the number of BTUs per hour in one horsepower).
- Round the result to the precision you need.
Worked example (a family car engine): 150 hp × 2,544.43 = 381665 BTU/h.
To convert BTUs per hour back to horsepower, multiply by 0.000393015, or divide by 2,544.43.
Source: NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU).
Horsepower to BTUs per Hour conversion table
| Horsepower [hp] | BTUs per Hour [BTU/h] |
|---|---|
| 0.001 hp | 2.5444335774 BTU/h |
| 0.01 hp | 25.444335774 BTU/h |
| 0.1 hp | 254.4433577403 BTU/h |
| 0.5 hp | 1272.2167887014 BTU/h |
| 1 hp | 2544.4335774029 BTU/h |
| 2 hp | 5088.8671548057 BTU/h |
| 5 hp | 12722.1678870143 BTU/h |
| 10 hp | 25444.3357740286 BTU/h |
hp to BTU/h chart from 1 to 100
- 1 hp 2544.43 BTU/h
- 2 hp 5088.87 BTU/h
- 3 hp 7633.3 BTU/h
- 4 hp 10177.7 BTU/h
- 5 hp 12722.2 BTU/h
- 6 hp 15266.6 BTU/h
- 7 hp 17811 BTU/h
- 8 hp 20355.5 BTU/h
- 9 hp 22899.9 BTU/h
- 10 hp 25444.3 BTU/h
- 11 hp 27988.8 BTU/h
- 12 hp 30533.2 BTU/h
- 13 hp 33077.6 BTU/h
- 14 hp 35622.1 BTU/h
- 15 hp 38166.5 BTU/h
- 16 hp 40710.9 BTU/h
- 17 hp 43255.4 BTU/h
- 18 hp 45799.8 BTU/h
- 19 hp 48344.2 BTU/h
- 20 hp 50888.7 BTU/h
- 25 hp 63610.8 BTU/h
- 30 hp 76333 BTU/h
- 35 hp 89055.2 BTU/h
- 40 hp 101777 BTU/h
- 45 hp 114500 BTU/h
- 50 hp 127222 BTU/h
- 55 hp 139944 BTU/h
- 60 hp 152666 BTU/h
- 65 hp 165388 BTU/h
- 70 hp 178110 BTU/h
- 75 hp 190833 BTU/h
- 80 hp 203555 BTU/h
- 85 hp 216277 BTU/h
- 90 hp 228999 BTU/h
- 95 hp 241721 BTU/h
- 100 hp 254443 BTU/h
BTUs per Hour to Horsepower conversion table
| BTUs per Hour [BTU/h] | Horsepower [hp] |
|---|---|
| 1 BTU/h | 0.0003930148 hp |
| 10 BTU/h | 0.0039301478 hp |
| 100 BTU/h | 0.0393014779 hp |
| 1000 BTU/h | 0.393014779 hp |
| 10000 BTU/h | 3.9301477896 hp |
| 100000 BTU/h | 39.3014778959 hp |
| 1000000 BTU/h | 393.0147789595 hp |
Horsepower vs BTUs per Hour
| Horsepower | BTU per Hour | |
|---|---|---|
| Symbol | hp | BTU/h |
| Equals | 1 hp = 2,544.43 BTU/h | 1 BTU/h = 0.000393015 hp |
What is a horsepower?
Originally defined to compare steam engines to draft horses. Used worldwide for engine and motor power ratings.
What is a BTU per hour?
The rate of one British thermal unit of heat transfer per hour. Used in the US for air conditioner and heater ratings.
Frequently asked questions
How many BTUs per hour are in a horsepower?
There are 2,544.43 BTUs per hour in 1 horsepower (1 hp = 2544.4335774029 BTU/h).
How many horsepower are in a BTU per hour?
There are 0.000393015 horsepower in 1 BTU per hour (1 BTU/h = 0.0003930148 hp).
How do I convert horsepower to BTUs per hour?
Multiply the number of horsepower by 2,544.43. For example, 10 hp × 2,544.43 = 25,444.3 BTU/h. To convert back, multiply by 0.000393015.
What is 10 hp in BTUs per hour?
10 hp = 25,444.3 BTU/h.
What is 100 hp in BTUs per hour?
100 hp = 254,443 BTU/h.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU)). Results are shown to up to 10 decimal places; round them to suit your purpose.
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