Watts to BTU per Hour Converter
Quick answer: To convert watts to BTU per Hour, multiply by 3.412142. For example, 10 W is 34.12142 Btu/h. One watt equals 3.412142 Btu/h.
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Use the Watts to BTU per Hour Converter
Watts to BTU per Hour formula and what each symbol means
Btu/h = W × 3.412142
| Symbol | Meaning |
|---|---|
| W | Watt |
| Btu/h | BTU per hour |
Watts to BTU per Hour examples
1 W
1 W × 3.412142 = 3.412142 Btu/h.
10 W
10 W × 3.412142 = 34.12142 Btu/h.
100 W
100 W × 3.412142 = 341.2142 Btu/h.
Watts compared with BTU per Hour
One W is 3.412 times as large as one Btu/h, so your number gets bigger when you convert watts to BTU per Hour and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About watts and BTU per Hour
Watt (W): The SI unit of power, one joule per second.
Where watts to BTU per Hour conversions are used
Power stations and the grid are described in megawatts and gigawatts. Engines and motors are rated in kilowatts or horsepower, depending on the market.
How to calculate Watts to BTU per Hour step by step
- Enter the value in W (the starting unit).
- Multiply by 3.412142, because 1 W = 3.412142 Btu/h.
- The product is the value in Btu/h. To go back, divide by 3.412142 or multiply by 0.2930711.
Popular power conversions
How to read your Watts to BTU per Hour result
Quick estimate: multiply by about 3.4 to get BTU per Hour from watts; this is within 0.4% of the exact factor. Mechanical horsepower is about 745.7 W while metric horsepower (PS) is exactly 735.49875 W, so check which one a car or motor spec uses.
| WATTS | BTU PER HOUR |
|---|---|
| 1 | 3.412142 |
| 2 | 6.824283 |
| 5 | 17.06071 |
| 10 | 34.12142 |
| 20 | 68.24283 |
| 50 | 170.6071 |
| 100 | 341.2142 |
| 1,000 | 3,412.142 |
BTU per Hour to Watts: quick table
| BTU PER HOUR | WATTS |
|---|---|
| 1 | 0.2930711 |
| 5 | 1.465355 |
| 10 | 2.930711 |
| 25 | 7.326777 |
| 50 | 14.65355 |
| 100 | 29.30711 |
| 250 | 73.26777 |
| 500 | 146.5355 |
Common mistakes when calculating Watts to BTU per Hour
- Using Btu/h for heating loads without noting that 1 ton of refrigeration is 12,000 Btu/h.
- Dividing when you should multiply: from W to Btu/h multiply by 3.412142; from Btu/h to W divide by 3.412142.
Watts to BTU per Hour FAQ
How many Btu/h are in 1 W?
1 W equals 3.412142 Btu/h.
How many W are in 1 Btu/h?
1 Btu/h equals 0.2930711 W.
Is 1 W = 3.412142 Btu/h an exact conversion?
The factor is shown rounded to 7 significant figures (3.412142). The calculator above uses more digits.
What is a watt (W)?
The SI unit of power, one joule per second.
How can I estimate watts to BTU per Hour in my head?
Quick estimate: multiply by about 3.4 to get BTU per Hour from watts; this is within 0.4% of the exact factor.
What is 15 W in BTU per Hour?
15 W = 51.18212 Btu/h (since 15 × 3.412142).
What is 75 W in BTU per Hour?
75 W = 255.9106 Btu/h (since 75 × 3.412142).
What is 300 W in BTU per Hour?
300 W = 1,023.642 Btu/h (since 300 × 3.412142).
How many decimals should I keep when converting W to Btu/h?
Match the precision of your original measurement. For example, 34.12142 Btu/h rounds to 34.1 Btu/h at 3 significant figures; keep more digits only for engineering or scientific work.
More in Power converters
- Watts to MW Converter
- PS to kW Converter
- Watts to PS Converter
- PS to Horsepower Converter
- BTU per Hour to Horsepower Converter
- PS to BTU per Hour Converter
See all power converters tools · All Conversion calculators · Site map
Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors