Heat Transfer Coefficient Converter
Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 W/(m²·K) = 0.1761102 Btu/(h·ft²·°F); 1 W/(m²·K) = 0.8604207 kcal/(h·m²·°C); 1 Btu/(h·ft²·°F) = 5.678263 W/(m²·K). This converter covers 6 heat transfer coefficient units.
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Use the Heat Transfer Coefficient Converter
Heat Transfer Coefficient formula and what each symbol means
target = value × (factor of starting unit ÷ factor of target unit), where each factor is the unit value in W/(m²·K).
| Symbol | Meaning |
|---|---|
| value | The number you want to convert |
| factor | The unit’s size expressed in the base unit (W/(m²·K)) |
Heat Transfer Coefficient examples
W/(m²·K) to Btu/(h·ft²·°F)
10 W/(m²·K) = 1.761102 Btu/(h·ft²·°F).
W/(m²·K) to kcal/(h·m²·°C)
10 W/(m²·K) = 8.604207 kcal/(h·m²·°C).
Btu/(h·ft²·°F) to W/(m²·K)
10 Btu/(h·ft²·°F) = 56.78263 W/(m²·K).
How to calculate Heat Transfer Coefficient step by step
- Choose the starting unit and the target unit.
- Enter your value.
- Read the converted value, plus the conversion factor in both directions.
Popular heat transfer coefficient conversions
- Watts per square meter kelvin to Btu per hour square foot °F converter
- Watts per square meter kelvin to Kilocalories per hour square meter °C converter
- Btu per hour square foot °F to Watts per square meter kelvin converter
- Btu per hour square foot °F to Kilocalories per hour square meter °C converter
- Kilocalories per hour square meter °C to Watts per square meter kelvin converter
- Kilocalories per hour square meter °C to Btu per hour square foot °F converter
How to read your Heat Transfer Coefficient result
The heat transfer coefficient is heat flow per unit area per degree of temperature difference. The SI unit is watt per square metre kelvin. One kcal/(h·m²·°C) is about 1.1622 W/(m²·K), and one Btu/(h·ft²·°F) is about 5.6783 W/(m²·K).
| UNIT | SYMBOL | EQUALS | VALUE OF 1 W/(M²·K) |
|---|---|---|---|
| Watt per square meter kelvin | W/(m²·K) | 1 W/(m²·K) = 1 W/(m²·K) | 1 W/(m²·K) |
| Watt per square meter °C | W/(m²·°C) | 1 W/(m²·°C) = 1 W/(m²·K) | 1 W/(m²·°C) |
| Kilowatt per square meter kelvin | kW/(m²·K) | 1 kW/(m²·K) = 1,000 W/(m²·K) | 0.001 kW/(m²·K) |
| Calorie per second square centimeter °C | cal/(s·cm²·°C) | 1 cal/(s·cm²·°C) = 41,840 W/(m²·K) | 0.00002390057 cal/(s·cm²·°C) |
| Kilocalorie per hour square meter °C | kcal/(h·m²·°C) | 1 kcal/(h·m²·°C) = 1.1622222 W/(m²·K) | 0.8604207 kcal/(h·m²·°C) |
| Btu per hour square foot °F | Btu/(h·ft²·°F) | 1 Btu/(h·ft²·°F) = 5.6782633 W/(m²·K) | 0.1761102 Btu/(h·ft²·°F) |
Common mistakes when calculating Heat Transfer Coefficient
- Confusing the coefficient (W/(m²·K)) with thermal conductivity (W/(m·K)).
- Mixing kcal and Btu without converting.
- Forgetting that a Celsius degree and a kelvin are the same size.
Heat Transfer Coefficient FAQ
How many W/(m²·K) is 1 Btu/(h·ft²·°F)?
About 5.6783 W/(m²·K).
How many W/(m²·K) is 1 kcal/(h·m²·°C)?
About 1.1622 W/(m²·K).
How is it related to the U-value?
The U-value of a building element is a heat transfer coefficient, quoted in W/(m²·K).
What is the base unit for heat transfer coefficient?
This converter uses watt per square meter kelvin (W/(m²·K)) as the common base unit: every value is first converted to it and then to the target unit.
How do I convert between two heat transfer coefficient units?
Choose the starting and target units, enter the value and read the result. By hand: convert to the base unit with the table, then divide by the target unit factor.
How many Btu per hour square foot °F are in 1 watt per square meter kelvin?
1 W/(m²·K) = 0.1761102 Btu/(h·ft²·°F).
How many Kilocalories per hour square meter °C are in 1 watt per square meter kelvin?
1 W/(m²·K) = 0.8604207 kcal/(h·m²·°C).
How many watts per square meter kelvin are in 1 Btu per hour square foot °F?
1 Btu/(h·ft²·°F) = 5.678263 W/(m²·K).
Which heat transfer coefficient units does this converter support?
It covers 6 units: watt per square meter kelvin (W/(m²·K)), Watt per square meter °C (W/(m²·°C)), kilowatt per square meter kelvin (kW/(m²·K)), Calorie per second square centimeter °C (cal/(s·cm²·°C)), Kilocalorie per hour square meter °C (kcal/(h·m²·°C)), Btu per hour square foot °F (Btu/(h·ft²·°F)).
How accurate is the heat transfer coefficient converter?
Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.
More in Heat Transfer Coefficient converters
- Kilocalories per hour square meter °C to Btu per hour square foot °F Converter
- Kilocalories per hour square meter °C to Watts per square meter kelvin Converter
- Btu per hour square foot °F to Kilocalories per hour square meter °C Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)