Conversion method
Heat flux per temperature difference. Coefficients depend on the surface and flow conditions; conversion does not infer those conditions.
kW/(m²·K) = x × 0.001
10 W/(m²·K) = 0.01 kW/(m²·K).
| W/(m²·K) | kW/(m²·K) |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
Unit definitions and sources
Heat flux per temperature difference. Coefficients depend on the surface and flow conditions; conversion does not infer those conditions.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Watt per square meter kelvin (W/(m²·K)); si | Common units | Watt per square meter kelvin: base (w-m2-k) = value × 1. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Kilowatt per square meter kelvin (kW/(m²·K)); si | Common units | Kilowatt per square meter kelvin: base (w-m2-k) = value × 1000. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| BTU (IT) per hour square foot Fahrenheit (BTU IT/(h·ft²·°F)); si | Specialist units | BTU (IT) per hour square foot Fahrenheit: base (w-m2-k) = value × 5.678263341113487. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Watt per square centimeter kelvin (W/(cm²·K)); si | Specialist units | Watt per square centimeter kelvin: base (w-m2-k) = value × 10000.0. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Watt/square meter/K (W/(m²)/(K)); other | Specialist units | watt/square meter/K = 1.0 w-m2-k, derived from the component SI/customary definitions. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Joule/second/square meter/K (J/(s)/(m²)/(K)); other | Specialist units | joule/second/square meter/K = 1.0 w-m2-k, derived from the component SI/customary definitions. Common use: Heat Transfer Coefficient. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of heat transfer coefficient conversions
All 6 heat transfer coefficient units convert through Watt per square meter kelvin (W/(m²·K)). 6 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.