Convert Watt per metre kelvin to Milliwatt per metre degree Celsius

Convert Watt per metre kelvin (W/(m·K)) to Milliwatt per metre degree Celsius (mW/(m·°C)) instantly and accurately.

Watt per metre kelvin (W/(m·K))
Milliwatt per metre degree Celsius (mW/(m·°C))

Conversion Formula

mW/(m·°C) = W/(m·K) × 1000

About Watt per metre kelvin

The watt per metre kelvin (W/(m·K)) is the SI unit for thermal conductivity defined by Fourier's law q = -λ∇T. Materials span orders of magnitude: aerogels ≈0.015, glass ≈1.0, stainless steel ≈16, aluminium ≈205, copper ≈385, diamond ≈2200 W/(m·K). Referenced in ISO 22007, EN 12667, and all major international standards. 1 W/(m·K) = 1 W/(m·°C).

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

Watt per metre kelvin (W/(m·K))Milliwatt per metre degree Celsius (mW/(m·°C))
1 W/(m·K)1000 mW/(m·°C)
2 W/(m·K)2000 mW/(m·°C)
5 W/(m·K)5000 mW/(m·°C)
10 W/(m·K)10000 mW/(m·°C)
25 W/(m·K)25000 mW/(m·°C)
50 W/(m·K)50000 mW/(m·°C)
100 W/(m·K)100000 mW/(m·°C)

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