Convert Watt per metre kelvin to Watt per millimetre kelvin
Convert Watt per metre kelvin (W/(m·K)) to Watt per millimetre kelvin (W/(mm·K)) instantly and accurately.
Conversion Formula
W/(mm·K) = W/(m·K) × 0.001
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 Watt per millimetre kelvin
The watt per millimetre kelvin (W/(mm·K)) equals exactly 1000 W/(m·K) since 1 mm = 10⁻³ m. Used in microelectronics thermal engineering where components are millimetre-scale: copper ≈0.385, silicon ≈0.148 W/(mm·K). Thermal interface material datasheets for high-performance pads and solder joints commonly use this unit. 1 W/(mm·K) = 1000 W/(m·K) = 10 W/(cm·K).
Quick Reference Table
| Watt per metre kelvin (W/(m·K)) | Watt per millimetre kelvin (W/(mm·K)) |
|---|---|
| 1 W/(m·K) | 0.001 W/(mm·K) |
| 2 W/(m·K) | 0.002 W/(mm·K) |
| 5 W/(m·K) | 0.005 W/(mm·K) |
| 10 W/(m·K) | 0.01 W/(mm·K) |
| 25 W/(m·K) | 0.025 W/(mm·K) |
| 50 W/(m·K) | 0.05 W/(mm·K) |
| 100 W/(m·K) | 0.1 W/(mm·K) |