W/(m·K) to BTU/(hr·ft·°F) (W/(m·K) to BTU/(hr·ft·°F))
Result
0.5777893167 BTU/(hr·ft·°F)
Formula
BTU/(hr·ft·°F) = W/(m·K) × 0.5777893167
1 W/(m·K) = 0.5777893167 BTU/(hr·ft·°F), and 1 BTU/(hr·ft·°F) = 1.730734666 W/(m·K).
Thermal conductivity converts between SI and US units using the International Table BTU: 1 BTU/(h·ft·°F) = 1.730735 W/(m·K).
Worked examples
- 1 W/(m·K) × 0.5777893167 = 0.57778932 BTU/(hr·ft·°F)
- 10 W/(m·K) × 0.5777893167 = 5.7778932 BTU/(hr·ft·°F)
- 100 W/(m·K) × 0.5777893167 = 57.778932 BTU/(hr·ft·°F)
Common mistakes
- Conductivity (k) is a property of a material. U-values and R-values describe a whole wall or panel of a given thickness, so they are different quantities.
W/(m·K) to BTU/(hr·ft·°F) table
| W/(m·K) (W/(m·K)) | BTU/(hr·ft·°F) (BTU/(hr·ft·°F)) |
|---|---|
| 1 | 0.57778932 |
| 2 | 1.1555786 |
| 5 | 2.8889466 |
| 10 | 5.7778932 |
| 20 | 11.555786 |
| 50 | 28.889466 |
| 100 | 57.778932 |
| 1,000 | 577.78932 |
The units
- W/(m·K) (W/(m·K))
- A unit of thermal.
- BTU/(hr·ft·°F) (BTU/(hr·ft·°F))
- 1 BTU/(hr·ft·°F) = 1.730734666 W/(m·K).
Sources for these factors
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy