BTU per hour square foot °F to Watts per square metre kelvin
Convert BTU per hour square foot °F to watts per square metre kelvin instantly.
BTU per hour square foot °F to Watts per square metre kelvin (BTU/(h·ft²·°F) to W/(m²·K)) Converter
1 BTU per hour square foot °F = 5.6783 watts per square metre kelvin
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- 1 BTU/(h·ft²·°F) = 5.6783 W/(m²·K)
- 5 BTU/(h·ft²·°F) = 28.391 W/(m²·K)
- 10 BTU/(h·ft²·°F) = 56.783 W/(m²·K)
- 25 BTU/(h·ft²·°F) = 141.96 W/(m²·K)
- Watts per square metre kelvinW/(m²·K)
- BTU per hour square foot °FBTU/(h·ft²·°F)
- Watts per square metre kelvinW/(m²·K)
- BTU per hour square foot °FBTU/(h·ft²·°F)
How it’s calculated
W/(m²·K) = BTU/(h·ft²·°F) × 5.678263341
- Multiply the value in BTU per hour square foot °F by 5.678263341.
- To go back, divide by 5.678263341 (or multiply by 0.1761101837).
- 1 BTU/(h·ft²·°F) = 5.678263341 W/(m²·K) · 1 W/(m²·K) = 0.1761101837 BTU/(h·ft²·°F)
Quick examples
1 BTU per hour square foot °F = 5.6783 watts per square metre kelvin · 1 W/(m²·K) = 0.17611 BTU/(h·ft²·°F)
- 1 BTU per hour square foot °F = 5.6783 watts per square metre kelvin
- 5 BTU per hour square foot °F = 28.391 watts per square metre kelvin
- 10 BTU per hour square foot °F = 56.783 watts per square metre kelvin
- 25 BTU per hour square foot °F = 141.96 watts per square metre kelvin
- 100 BTU per hour square foot °F = 567.83 watts per square metre kelvin
BTU per hour square foot °F to watts per square metre kelvin conversion table
| BTU per hour square foot °F (BTU/(h·ft²·°F)) | Watts per square metre kelvin (W/(m²·K)) |
|---|---|
| 0.1 BTU/(h·ft²·°F) | 0.56783 W/(m²·K) |
| 0.15 BTU/(h·ft²·°F) | 0.85174 W/(m²·K) |
| 0.2 BTU/(h·ft²·°F) | 1.1357 W/(m²·K) |
| 0.25 BTU/(h·ft²·°F) | 1.4196 W/(m²·K) |
| 0.3 BTU/(h·ft²·°F) | 1.7035 W/(m²·K) |
| 0.5 BTU/(h·ft²·°F) | 2.8391 W/(m²·K) |
| 1 BTU/(h·ft²·°F) | 5.6783 W/(m²·K) |
| 1.5 BTU/(h·ft²·°F) | 8.5174 W/(m²·K) |
| 2 BTU/(h·ft²·°F) | 11.357 W/(m²·K) |
| 5 BTU/(h·ft²·°F) | 28.391 W/(m²·K) |
| 10 BTU/(h·ft²·°F) | 56.783 W/(m²·K) |
| 25 BTU/(h·ft²·°F) | 141.96 W/(m²·K) |
| 50 BTU/(h·ft²·°F) | 283.91 W/(m²·K) |
| 100 BTU/(h·ft²·°F) | 567.83 W/(m²·K) |
| 1,000 BTU/(h·ft²·°F) | 5,678.3 W/(m²·K) |
About these units
BTU per hour square foot °F (BTU/(h·ft²·°F))
US & imperial (identical)
1 BTU/(h·ft²·°F) ≈ 5.6782633 W/(m²·K)
The US U-factor unit, about 5.6783 W/(m²·K).
Source: NIST SP 811 / Handbook 44
Watt per square metre kelvin (W/(m²·K))
SI (metric)
Base unit
The SI unit of heat transfer coefficient and building U-value.
Source: BIPM SI Brochure (9th ed.)
Frequently asked questions
How do I convert BTU per hour square foot °F to watts per square metre kelvin?
Use W/(m²·K) = BTU/(h·ft²·°F) × 5.678263341. Multiply the value in BTU per hour square foot °F by 5.678263341.
How many watts per square metre kelvin are in 1 BTU per hour square foot °F?
1 BTU per hour square foot °F (BTU/(h·ft²·°F)) equals 5.6783 watts per square metre kelvin (W/(m²·K)); more precisely 5.678263341.
How many BTU per hour square foot °F are in 1 watt per square metre kelvin?
1 watt per square metre kelvin (W/(m²·K)) equals 0.17611 BTU per hour square foot °F (BTU/(h·ft²·°F)); more precisely 0.1761101837.
What is 10 BTU/(h·ft²·°F) in W/(m²·K)?
10 BTU per hour square foot °F = 56.783 watts per square metre kelvin.
What is a BTU per hour square foot °F?
The US U-factor unit, about 5.6783 W/(m²·K).
What is a watt per square metre kelvin?
The SI unit of heat transfer coefficient and building U-value.
Related conversions
Formula: W/(m²·K) = BTU/(h·ft²·°F) × 5.678263341. Factors last reviewed 2026-10-27.