BTU inch per hour square foot °F to Watts per metre kelvin
1 BTU inch per hour square foot °F = 0.14423 watts per metre kelvin · 1 W/(m·K) = 6.9335 BTU·in/(h·ft²·°F)
1 BTU inch per hour square foot °F = 0.14423 watts per metre kelvin
How it’s calculated
W/(m·K) = BTU·in/(h·ft²·°F) × 0.1442278889
- Multiply the value in BTU inch per hour square foot °F by 0.1442278889.
- To go back, divide by 0.1442278889 (or multiply by 6.933471799).
- 1 BTU·in/(h·ft²·°F) = 0.1442278889 W/(m·K) · 1 W/(m·K) = 6.933471799 BTU·in/(h·ft²·°F)
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 W/(m·K) = 6.93347179851598 BTU·in/(h·ft²·°F). Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).
Multiply by the factor written as a fraction
Put BTU·in/(h·ft²·°F) in the denominator so it cancels, leaving W/(m·K).
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 0.14423 W/(m·K)
1 BTU·in/(h·ft²·°F) in other units
Batch convert BTU·in/(h·ft²·°F) → W/(m·K)
- 1 BTU·in/(h·ft²·°F) = 0.14423 W/(m·K)
- 5 BTU·in/(h·ft²·°F) = 0.72114 W/(m·K)
- 10 BTU·in/(h·ft²·°F) = 1.4423 W/(m·K)
- 25 BTU·in/(h·ft²·°F) = 3.6057 W/(m·K)
Quick examples
- 1 BTU inch per hour square foot °F = 0.14423 watts per metre kelvin
- 5 BTU inch per hour square foot °F = 0.72114 watts per metre kelvin
- 10 BTU inch per hour square foot °F = 1.4423 watts per metre kelvin
- 25 BTU inch per hour square foot °F = 3.6057 watts per metre kelvin
- 100 BTU inch per hour square foot °F = 14.423 watts per metre kelvin
About these units
BTU inch per hour square foot °F (BTU·in/(h·ft²·°F))
US & imperial (identical)
≈ 0.144 227 9 W/(m·K). US insulation k-value unit.
1 BTU·in/(h·ft²·°F) = 0.1442278889 W/(m·K)
Source: NIST SP 811 / Handbook 44
Watt per metre kelvin (W/(m·K))
SI (metric)
SI unit of thermal conductivity. Copper ≈ 400, steel ≈ 50, mineral wool ≈ 0.04 W/(m·K).
Base unit
Source: BIPM SI Brochure (9th ed.)
BTU inch per hour square foot °F to watts per metre kelvin conversion table
| BTU inch per hour square foot °F (BTU·in/(h·ft²·°F)) | Watts per metre kelvin (W/(m·K)) |
|---|---|
| 0.025 BTU·in/(h·ft²·°F) | 0.0036057 W/(m·K) |
| 0.04 BTU·in/(h·ft²·°F) | 0.0057691 W/(m·K) |
| 0.1 BTU·in/(h·ft²·°F) | 0.014423 W/(m·K) |
| 0.5 BTU·in/(h·ft²·°F) | 0.072114 W/(m·K) |
| 1 BTU·in/(h·ft²·°F) | 0.14423 W/(m·K) |
| 1.5 BTU·in/(h·ft²·°F) | 0.21634 W/(m·K) |
| 15 BTU·in/(h·ft²·°F) | 2.1634 W/(m·K) |
| 50 BTU·in/(h·ft²·°F) | 7.2114 W/(m·K) |
| 100 BTU·in/(h·ft²·°F) | 14.423 W/(m·K) |
| 200 BTU·in/(h·ft²·°F) | 28.846 W/(m·K) |
| 237 BTU·in/(h·ft²·°F) | 34.182 W/(m·K) |
| 400 BTU·in/(h·ft²·°F) | 57.691 W/(m·K) |
Related conversions
Frequently asked questions
How do I convert BTU inch per hour square foot °F to watts per metre kelvin?
Use W/(m·K) = BTU·in/(h·ft²·°F) × 0.1442278889. Multiply the value in BTU inch per hour square foot °F by 0.1442278889.
How many watts per metre kelvin are in 1 BTU inch per hour square foot °F?
1 BTU inch per hour square foot °F (BTU·in/(h·ft²·°F)) equals 0.14423 watts per metre kelvin (W/(m·K)); more precisely 0.1442278889.
How many BTU inch per hour square foot °F are in 1 watt per metre kelvin?
1 watt per metre kelvin (W/(m·K)) equals 6.9335 BTU inch per hour square foot °F (BTU·in/(h·ft²·°F)); more precisely 6.933471799.
What is 15 BTU·in/(h·ft²·°F) in W/(m·K)?
15 BTU inch per hour square foot °F = 2.1634 watts per metre kelvin.
What is a BTU inch per hour square foot °F?
≈ 0.144 227 9 W/(m·K). US insulation k-value unit.
What is a watt per metre kelvin?
SI unit of thermal conductivity. Copper ≈ 400, steel ≈ 50, mineral wool ≈ 0.04 W/(m·K).
Formula: W/(m·K) = BTU·in/(h·ft²·°F) × 0.1442278889. Factors last reviewed 2026-10-27.