Convert Horsepower to BTU per hour
1 horsepower is 2,544.433578 BTU/h. One horsepower is exactly 2544.43357764 BTU per hour.
One horsepower is 2544.4336 BTU per hour. To convert horsepower to BTU per hour, multiply by 2544.4336; to go the other way, divide by 2544.4336 or multiply by 3.9301 × 10^-4. The factor is exact rather than rounded: it follows from NIST Special Publication 811. Mechanical horsepower: exactly 550 foot-pounds of work every second, the figure James Watt settled on to sell engines against pit ponies.
Factor checked against the defining standard · How we check
- Horsepower × 2544.4336
value * 2544.433577642,544.434 BTU/h
1 horsepower in every power unit
| Unit | Value | Exact factor |
|---|---|---|
| horsepower (as entered) | 1 hp | — |
| metric horsepower | 1.013869665 PS | × 1.01386966542 |
| watts | 745.6998716 W | × 745.699871582 |
| kilowatts | 0.7456998716 kW | × 0.745699871582 |
| megawatts | 0.0007456998716 MW | × 0.000745699871582 |
| BTU per hour | 2,544.433578 BTU/h | × 2,544.43357764 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert horsepower to BTU per hour?
- 1.Take the measurement in horsepower.
- 2.Multiply by 2544.4336 — that is how many BTU per hour fit in one horsepower.
- 3.To go back the other way, divide by 2544.4336, or multiply by 3.9301 × 10^-4.
Worked example: 25 horsepower to BTU per hour
- Formula
- hp × 2544.4336 = BTU/h
- Arithmetic
- 25 × 2544.4336 = 63,610.839441 BTU/h
- Answer
- 25 hp = 63,610.839441 BTU/h
The factor is rounded for display; the figure above is computed from the full value.
Horsepower to BTU per hour conversion table
| Horsepower | BTU per hour |
|---|---|
| 1 hp | 2,544.433578 BTU/h |
| 2 hp | 5,088.867155 BTU/h |
| 3 hp | 7,633.300733 BTU/h |
| 4 hp | 10,177.734311 BTU/h |
| 5 hp | 12,722.167888 BTU/h |
| 6 hp | 15,266.601466 BTU/h |
| 7 hp | 17,811.035043 BTU/h |
| 8 hp | 20,355.468621 BTU/h |
| 9 hp | 22,899.902199 BTU/h |
| 10 hp | 25,444.335776 BTU/h |
| 12 hp | 30,533.202932 BTU/h |
| 15 hp | 38,166.503665 BTU/h |
| 20 hp | 50,888.671553 BTU/h |
| 25 hp | 63,610.839441 BTU/h |
| 50 hp | 127,221.678882 BTU/h |
| 100 hp | 254,443.357764 BTU/h |
| 200 hp | 508,886.715528 BTU/h |
| 300 hp | 763,330.073292 BTU/h |
| 500 hp | 1,272,216.78882 BTU/h |
| 1000 hp | 2,544,433.57764 BTU/h |
| 2000 hp | 5,088,867.15528 BTU/h |
| 5000 hp | 12,722,167.8882 BTU/h |
| 10000 hp | 25,444,335.7764 BTU/h |
What is a horsepower?
Mechanical horsepower: exactly 550 foot-pounds of work every second, the figure James Watt settled on to sell engines against pit ponies. US vehicle and motor ratings use it.
What is a BTU per hour?
The rate US heating and air conditioning is sold in. A 12,000 BTU/h unit is one "ton" of cooling and about 3.5 kilowatts of heat moved.
How many BTU per hour are in a horsepower?
One horsepower is 2544.4336 BTU per hour. Going the other way, one BTU per hour is 3.9301 × 10^-4 horsepower. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every power unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Horsepower | hp | 745.69987 watt |
| Metric horsepower | PS | 735.49875 watt |
| Watts | W | the base unit |
| Kilowatts | kW | 1000 watt |
| Megawatts | MW | 1000000 watt |
| BTU per hour | BTU/h | 0.29307107 watt |
Source: NIST Special Publication 811 — mechanical horsepower is 550 ft·lbf/s exactly
Questions people actually ask
- How many BTU per hour are in a horsepower?
- 2544.4336. The rate US heating and air conditioning is sold in. A 12,000 BTU/h unit is one "ton" of cooling and about 3.5 kilowatts of heat moved.
- How do I convert BTU per hour back to horsepower?
- Divide by 2544.4336, or multiply by 3.9301 × 10^-4 — they are the same operation.
Other power conversions
BTU per hour to horsepower — the same conversion the other way.