Unit converter
Heat Transfer Coefficient converter
Convert heat transfer coefficient units across SI, metric, and imperial engineering systems.
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1 W/(m²·K) = 1 W/(m²·°C)
All Heat Transfer Coefficient units
From 1 W/(m²·K)| Unit | Value |
|---|---|
| Watt/square meter/K W/(m²·K) | 1 |
| Watt/square meter/°C W/(m²·°C) | 1 |
| Joule/square meter/second/K J/(m²·s·K) | 1 |
| Joule/square meter/second/°C J/(m²·s·°C) | 1 |
| Calorie (IT)/square meter/second/°C cal/(m²·s·°C) | 0.0000238846 |
| Kilocalorie (IT)/square meter/hour/°C kcal/(m²·h·°C) | 0.8598452279 |
| Btu (IT)/square foot/second/°F Btu/(ft²·s·°F) | 0.0000489195 |
| Btu (IT)/square foot/hour/°F Btu/(ft²·h·°F) | 0.1761101838 |
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Reference
How heat transfer coefficient conversion works
A heat transfer coefficient relates heat flux to the temperature difference driving it. Values are normalized to Watt/square meter/K before conversion to the requested output unit.
Values are converted to watt/square meter/k first, then from that reference into the requested unit. Keeping a single documented reference reduces inconsistent pair-by-pair constants.
Unit reference
| Unit | Symbol | 1 unit in W/(m²·K) |
|---|---|---|
| Watt/square meter/K | W/(m²·K) | 1 |
| Watt/square meter/°C | W/(m²·°C) | 1 |
| Joule/square meter/second/K | J/(m²·s·K) | 1 |
| Joule/square meter/second/°C | J/(m²·s·°C) | 1 |
| Calorie (IT)/square meter/second/°C | cal/(m²·s·°C) | 41,868 |
| Kilocalorie (IT)/square meter/hour/°C | kcal/(m²·h·°C) | 1.163 |
| Btu (IT)/square foot/second/°F | Btu/(ft²·s·°F) | 20,441.748029999999 |
| Btu (IT)/square foot/hour/°F | Btu/(ft²·h·°F) | 5.678263338 |
Long-tail directory
Every indexed conversion
Choose a source unit to see all available destinations.
From Watt/square meter/K (W/(m²·K))
From Watt/square meter/°C (W/(m²·°C))
From Joule/square meter/second/K (J/(m²·s·K))
From Joule/square meter/second/°C (J/(m²·s·°C))
From Calorie (IT)/square meter/second/°C (cal/(m²·s·°C))
Primary source
Definitions and standards
The SI framework is checked against NIST Guide for the Use of the International System of Units. Conventional factors are retained from the extended ConvertWin inventory and carry the accuracy note shown above.
See Methods & sources for rounding rules, exact-value handling, and review policy.
Questions
Heat Transfer Coefficient FAQ
What is the reference unit for heat transfer coefficient conversions?
ConvertWin uses watt/square meter/k (W/(m²·K)) as the internal reference for this category, then converts to the selected output unit.
How accurate is this heat transfer coefficient converter?
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.