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Heat Transfer Converter

Convert between different heat transfer coefficient units including W/m²·K, BTU/hr·ft²·°F, cal/s·cm²·°C, and more. Perfect for engineering, HVAC, construction, and thermal analysis.

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Common Conversions
Quick access to frequently used conversions
Unit Information

SI Units

International System of Units (SI) measurements

W/m²·K
si
Watt per Square Meter per Kelvin
Base SI unit of heat transfer coefficient
kW/m²·K
si
Kilowatt per Square Meter per Kelvin
High heat transfer coefficient unit
mW/m²·K
si
Milliwatt per Square Meter per Kelvin
Low heat transfer coefficient unit

Imperial Units

Traditional British and American measurements

BTU/hr·ft²·°F
imperial
BTU per Hour per Square Foot per Fahrenheit
Common imperial unit in HVAC and construction
BTU/hr·ft²·°R
imperial
BTU per Hour per Square Foot per Rankine
Imperial unit using Rankine temperature scale
BTU/s·ft²·°F
imperial
BTU per Second per Square Foot per Fahrenheit
High heat transfer coefficient unit

Metric Units

International System of Units (SI) measurements

cal/s·cm²·°C
metric
Calorie per Second per Square Centimeter per Celsius
CGS unit commonly used in engineering
kcal/h·m²·°C
metric
Kilocalorie per Hour per Square Meter per Celsius
Metric unit used in building energy calculations
kcal/h·m²·K
metric
Kilocalorie per Hour per Square Meter per Kelvin
Metric unit using Kelvin temperature scale

Scientific Units

Scientific and technical measurements

erg/s·cm²·°C
scientific
Erg per Second per Square Centimeter per Celsius
CGS unit for very low heat transfer coefficients
J/s·m²·K
scientific
Joule per Second per Square Meter per Kelvin
Alternative SI unit representation
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Common Use Cases

  • •HVAC Design: Convert heat exchanger coefficients between SI and imperial units
  • •Building Energy: Convert wall insulation heat transfer coefficients
  • •Engineering: Convert thermal analysis coefficients for design calculations
  • •Construction: Convert building envelope heat transfer values
  • •Research: Convert scientific heat transfer measurements

Popular Conversions

0.5 W/m²·K→2.84 BTU/hr·ft²·°F
50 BTU/hr·ft²·°F→283.9 W/m²·K
0.1 cal/s·cm²·°C→3600 kcal/h·m²·°C
2.5 kcal/h·m²·°C→2.91 W/m²·K

How Our Heat Transfer Converter Works

1️⃣

Enter Heat Transfer Value

Input any heat transfer coefficient value in the "From" field. Our converter accepts decimal numbers and scientific notation.

2️⃣

Select Units

Choose your source unit (e.g., W/m²·K) and target unit (e.g., BTU/hr·ft²·°F) from our comprehensive unit selection.

3️⃣

Get Instant Result

View the converted heat transfer coefficient in real-time. Copy results, explore common conversions, or check conversion history.

Understanding Heat Transfer Coefficient Units

SI Units (International System)

W/m²·K (Watt per Square Meter per Kelvin)
Base SI unit of heat transfer coefficient. Represents the amount of heat transferred per unit area per unit temperature difference.
kW/m²·K (Kilowatt per Square Meter per Kelvin)
High heat transfer coefficient unit, commonly used in industrial applications and high-performance heat exchangers.

Imperial Units

BTU/hr·ft²·°F (BTU per Hour per Square Foot per Fahrenheit)
Standard imperial unit in HVAC, construction, and building energy calculations in the United States.
BTU/s·ft²·°F (BTU per Second per Square Foot per Fahrenheit)
High heat transfer coefficient unit for applications requiring rapid heat transfer calculations.

Metric Engineering Units

cal/s·cm²·°C (Calorie per Second per Square Centimeter per Celsius)
CGS unit commonly used in engineering calculations and scientific research, especially in thermal analysis.
kcal/h·m²·°C (Kilocalorie per Hour per Square Meter per Celsius)
Metric unit widely used in building energy calculations, insulation specifications, and thermal comfort studies.

Scientific Units

erg/s·cm²·°C (Erg per Second per Square Centimeter per Celsius)
CGS unit for very low heat transfer coefficients, used in specialized scientific research and micro-scale thermal analysis.
J/s·m²·K (Joule per Second per Square Meter per Kelvin)
Alternative SI unit representation, equivalent to W/m²·K, used in some scientific publications and research papers.

Frequently Asked Questions

What is a heat transfer coefficient?

A heat transfer coefficient represents the amount of heat transferred per unit area per unit temperature difference. It's a measure of how effectively heat can be transferred between a surface and a fluid or between two surfaces.

Why are heat transfer coefficients always positive?

Heat transfer coefficients represent the rate of heat transfer, which is always a positive quantity. The direction of heat flow is determined by the temperature difference, not the coefficient itself.

What are typical values for different materials?

Typical values range from 0.1 W/m²·K for natural convection to 10,000+ W/m²·K for boiling water. Building materials typically range from 0.5 to 50 W/m²·K depending on the material and conditions.

How accurate are the conversion factors?

Our converter uses precise conversion factors based on internationally recognized standards. All conversions maintain accuracy up to 8 decimal places for engineering and scientific applications.

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