From To W/(m·K) W/(m·C) BTU/(h·ft·F)
W/(m·K) 1 1 0.577789
W/(m·C) 1 1 0.577789
BTU/(h·ft·F) 1.73073 1.73073 1

Each cell shows the factor to convert 1 unit of the row header into the column header.

Highlighted diagonal cells represent identity conversions (1:1).