Convert BTU per second per foot per degree Fahrenheit to Milliwatt per metre degree Celsius

Convert BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) to Milliwatt per metre degree Celsius (mW/(m·°C)) instantly and accurately.

Conversion Formula

mW/(m·°C) = BTU/(s·ft·°F) × 6230644.799

About BTU per second per foot per degree Fahrenheit

The BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) equals (1055.05585262 × 9)/(0.3048 × 5) W/(m·K) ≈6230.6 W/(m·K). Equal to 3600 × BTU/(h·ft·°F). Reserved for extremely high-power transient applications in US engineering literature; copper ≈0.0617; carbon steel ≈0.0072 BTU/(s·ft·°F). 1 BTU/(s·ft·°F) = 3600 BTU/(h·ft·°F) ≈6230.6 W/(m·K).

About Milliwatt per metre degree Celsius

The milliwatt per metre degree Celsius (mW/(m·°C)) equals exactly 1 mW/(m·K) = 10⁻³ W/(m·K) since temperature intervals 1 °C = 1 K. Used interchangeably with mW/(m·K) in building physics, insulation standards (EN ISO 10456), and material datasheets where Celsius is the preferred temperature scale. Still air ≈26 mW/(m·°C); mineral wool ≈35 mW/(m·°C). 1 mW/(m·°C) = 1 mW/(m·K) = 10⁻³ W/(m·K).

Quick Reference Table

→ Full Thermal Conductivity Converter