Convert Watts to BTU per hour
1 watt is 3.412142 BTU/h. One watt is exactly 3.41214163313 BTU per hour.
One watt is 3.4121416 BTU per hour. To convert watts to BTU per hour, multiply by 3.4121416; to go the other way, divide by 3.4121416 or multiply by 0.29307107. The factor is exact rather than rounded: it follows from NIST Special Publication 811. The SI unit: one joule every second.
Factor checked against the defining standard · How we check
- Watts × 3.4121416
value * 3.412141633133.412 BTU/h
1 watt in every power unit
| Unit | Value | Exact factor |
|---|---|---|
| horsepower | 0.00134102209 hp | × 0.0013410220896 |
| metric horsepower | 0.001359621617 PS | × 0.0013596216173 |
| watts (as entered) | 1 W | — |
| kilowatts | 0.001 kW | × 0.001 |
| megawatts | 0.000001 MW | × 0.000001 |
| BTU per hour | 3.412141633 BTU/h | × 3.41214163313 |
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 watts to BTU per hour?
- 1.Take the measurement in watts.
- 2.Multiply by 3.4121416 — that is how many BTU per hour fit in one watt.
- 3.To go back the other way, divide by 3.4121416, or multiply by 0.29307107.
Worked example: 25 watts to BTU per hour
- Formula
- W × 3.4121416 = BTU/h
- Arithmetic
- 25 × 3.4121416 = 85.303541 BTU/h
- Answer
- 25 W = 85.303541 BTU/h
The factor is rounded for display; the figure above is computed from the full value.
Watts to BTU per hour conversion table
| Watts | BTU per hour |
|---|---|
| 1 W | 3.412142 BTU/h |
| 2 W | 6.824283 BTU/h |
| 3 W | 10.236425 BTU/h |
| 4 W | 13.648567 BTU/h |
| 5 W | 17.060708 BTU/h |
| 6 W | 20.47285 BTU/h |
| 7 W | 23.884991 BTU/h |
| 8 W | 27.297133 BTU/h |
| 9 W | 30.709275 BTU/h |
| 10 W | 34.121416 BTU/h |
| 12 W | 40.9457 BTU/h |
| 15 W | 51.182124 BTU/h |
| 20 W | 68.242833 BTU/h |
| 25 W | 85.303541 BTU/h |
| 50 W | 170.607082 BTU/h |
| 100 W | 341.214163 BTU/h |
| 200 W | 682.428327 BTU/h |
| 300 W | 1,023.64249 BTU/h |
| 500 W | 1,706.070817 BTU/h |
| 1000 W | 3,412.141633 BTU/h |
| 2000 W | 6,824.283266 BTU/h |
| 5000 W | 17,060.708166 BTU/h |
| 10000 W | 34,121.416331 BTU/h |
What is a watt?
The SI unit: one joule every second. A watt is a rate, not an amount, which is the distinction between it and the watt-hour on your electricity bill.
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 watt?
One watt is 3.4121416 BTU per hour. Going the other way, one BTU per hour is 0.29307107 watts. 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 watt?
- 3.4121416. 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 watts?
- Divide by 3.4121416, or multiply by 0.29307107 — they are the same operation.
Other power conversions
BTU per hour to watts — the same conversion the other way.