18 W/m²·K to BTU/hr·ft²·°F

18 W/m²·K = 3.17 BTU/hr·ft²·°F

W/m²·KBTU/hr·ft²·°F
15 W/m²·K2.6417
16 W/m²·K2.8178
17 W/m²·K2.9939
183.17
19 W/m²·K3.3461
20 W/m²·K3.5222
21 W/m²·K3.6983

18 W/m²·K = 3.17 BTU/hr·ft²·°F

Formula

1 W/(m²·K) = 0.176110 BTU/(hr·ft²·°F) · 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)