268 W/m²·K = 47.1976 BTU/hr·ft²·°F
| W/m²·K | BTU/hr·ft²·°F |
|---|---|
| 253 W/m²·K | 44.5559 |
| 258 W/m²·K | 45.4365 |
| 263 W/m²·K | 46.317 |
| 268 | 47.1976 |
| 273 W/m²·K | 48.0781 |
| 278 W/m²·K | 48.9587 |
| 283 W/m²·K | 49.8392 |
268 W/m²·K = 47.1976 BTU/hr·ft²·°F
1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)