Watts to BTU/hr Converter
Enter the power in watts below to convert it to btu/hr.
Convert Watts to BTU/hr
Enter a value in watts (W) to convert to btu/hr (BTU/hr).
Watt to BTU per Hour Conversion Table
Table showing various watt measurements converted to btu/hr. Click any preset value or arrow to load it into the converter.
| Watts (W) | BTU/hr (BTU/hr) |
|---|---|
| 1 W | 3.4121416 BTU/hr |
| 2 W | 6.8242833 BTU/hr |
| 2.5 W | 8.5303541 BTU/hr |
| 5 W | 17.0607082 BTU/hr |
| 10 W | 34.1214164 BTU/hr |
| 15 W | 51.1821245 BTU/hr |
| 20 W | 68.2428327 BTU/hr |
| 25 W | 85.3035409 BTU/hr |
| 30 W | 102.3642491 BTU/hr |
| 50 W | 170.6070818 BTU/hr |
How to Convert Watts to BTU/hr
To convert watts to btu/hr, multiply the power by the following conversion ratio: 3.4121416 btu/hr/watt.
Since one watt is equal to 3.4121416 btu/hr, you can use this simple formula to convert:
The power in btu/hr is equal to the power in watts multiplied by 3.4121416.
For example, here's how to convert 5 watts to btu/hr using the formula above.
How Many BTU/hr Are in a Watt?
There are 3.4121416 btu/hr in a watt, which is why we use this value in the formula above.
Our watt to btu per hour calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Watts and btu/hr are both units used to measure power. Keep reading to learn more about each unit.
What Is a Watt?
Coherent SI unit of power equal to 1 Joule per second (1 J/s). It serves as a primary reference unit for measuring power across scientific and practical applications. [1]
The watt is classified as an International System of Units (SI) unit of power. Watts can be abbreviated as W; for example, 1 watt can be written as 1 W.
As the primary coherent reference unit for power in this category, all other power units are mathematically anchored to the watt (W).
In practice, watts (W) are widely used across standard power applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a BTU per Hour?
A btu per hour is a unit of power equal to 0.2930711 watts (W), the base unit for power. HVAC thermal rate (1 W ≈ 3.41214 BTU/hr). [2]
The btu per hour is classified as a US customary and imperial unit of power. BTU/hr can be abbreviated as BTU/hr; for example, 1 btu per hour can be written as 1 BTU/hr.
When working with btu/hr (BTU/hr) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, btu/hr (BTU/hr) are widely used across standard power applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting power between watts (W) and btu/hr (BTU/hr), keep full floating-point precision (1 W = 3.4121416 BTU/hr; 1 BTU/hr = 0.2930711 W) during intermediate calculations and round only the final btu per hour figure to match your instrument tolerance.
More Watt & BTU per Hour Conversions
Need to calculate in the opposite direction? Use our btu/hr to watts converter (BTU/hr to W) to switch your starting unit immediately. You can also explore related tools such as converting tons of refrigeration to btu/hr, converting watts to horsepower (hp), or converting watts to kilowatts.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Watts (W) to BTU/hr (BTU/hr)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Watt (W) & BTU per Hour (BTU/hr)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (W to BTU/hr)