Heat Transfer Coefficient Converter - Convert W/m²·K, BTU/h·ft²·°F & More

Value

From

Result:

25 W/m²·K = 4.40275718 BTU/h·ft²·°F

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How Heat Transfer Coefficient Conversion Works

Input Coefficient

Enter U-value

Select Units

Choose coefficient units

Convert

Apply thermal formula

U₂ = U₁ × (f₁/f₂)

U-value conversion formula

Conversion Formulas

W/m²·K to BTU/h·ft²·°F

BTU/h·ft²·°F = W/m²·K ÷ 5.67826

Example: 25 W/m²·K = 25 ÷ 5.67826 = 4.40 BTU/h·ft²·°F

W/m²·K to cal/s·cm²·°C

cal/s·cm²·°C = W/m²·K ÷ 41868

Example: 100 W/m²·K = 100 ÷ 41868 = 0.00239 cal/s·cm²·°C

kW/m²·K to W/m²·K

W/m²·K = kW/m²·K × 1000

Example: 0.05 kW/m²·K = 0.05 × 1000 = 50 W/m²·K

kcal/h·m²·°C to W/m²·K

W/m²·K = kcal/h·m²·°C × 1.163

Example: 20 kcal/h·m²·°C = 20 × 1.163 = 23.26 W/m²·K

Heat Transfer Coefficient Conversion Table

W/m²·K	kW/m²·K	BTU/h·ft²·°F	cal/s·cm²·°C	kcal/h·m²·°C
1	0.001	0.18	0.00002	0.9
2	0.002	0.35	0.00005	1.7
5	0.005	0.88	0.00012	4.3
10	0.010	1.76	0.00024	8.6
15	0.015	2.64	0.00036	12.9
20	0.020	3.52	0.00048	17.2
25	0.025	4.40	0.00060	21.5
30	0.030	5.28	0.00072	25.8
40	0.040	7.04	0.00096	34.4
50	0.050	8.81	0.00119	43.0
75	0.075	13.21	0.00179	64.5
100	0.100	17.61	0.00239	86.0
150	0.150	26.42	0.00358	129.0
200	0.200	35.22	0.00478	172.0
300	0.300	52.83	0.00717	258.0

Heat Transfer Coefficient Progression Chart

5 W/m²·K

BTU/h·ft²·°F:0.88

cal/s·cm²·°C:0.00012

10 W/m²·K

BTU/h·ft²·°F:1.76

cal/s·cm²·°C:0.00024

25 W/m²·K

BTU/h·ft²·°F:4.40

cal/s·cm²·°C:0.00060

50 W/m²·K

BTU/h·ft²·°F:8.81

cal/s·cm²·°C:0.00119

100 W/m²·K

BTU/h·ft²·°F:17.61

cal/s·cm²·°C:0.00239

200 W/m²·K

BTU/h·ft²·°F:35.22

cal/s·cm²·°C:0.00478

Practice Problems

Problem 1:

Convert 35 W/m²·K to BTU/h·ft²·°F

Solution: 35 ÷ 5.67826 = 6.16 BTU/h·ft²·°F

Problem 2:

Convert 8 BTU/h·ft²·°F to W/m²·K

Solution: 8 × 5.67826 = 45.43 W/m²·K

Problem 3:

Convert 0.002 cal/s·cm²·°C to W/m²·K

Solution: 0.002 × 41868 = 83.74 W/m²·K

Problem 4:

Convert 0.08 kW/m²·K to BTU/h·ft²·°F

Solution: (0.08 × 1000) ÷ 5.67826 = 14.09 BTU/h·ft²·°F

Problem 5:

Convert 60 kcal/h·m²·°C to W/m²·K

Solution: 60 × 1.163 = 69.78 W/m²·K

Daily Uses of Heat Transfer Coefficient

Building insulation design and energy efficiency calculations

HVAC system sizing and heat exchanger performance

Window and door thermal performance ratings

Industrial process equipment thermal design

Refrigeration and cooling system efficiency analysis

Export Options

Quick Reference

📏1 meter

3.28 feet

⚖️1 kilogram

2.2 pounds

🌡️0°C

32°F

🥤1 liter

0.26 gallon

What is Heat Transfer Coefficient?

Heat transfer coefficient is a measure of how well heat moves between a surface and a fluid. It tells us how much heat passes through each square meter of surface area for every degree of temperature difference. Engineers use this value to design heating systems, cooling systems, and building insulation.

The most common unit is W/m²·K (watts per square meter per kelvin). In the United States, people often use BTU/h·ft²·°F (British thermal units per hour per square foot per degree Fahrenheit). Scientists sometimes use cal/s·cm²·°C (calories per second per square centimeter per degree Celsius).

How to Use This Heat Transfer Coefficient Converter

Step-by-Step Guide:

Enter your heat transfer coefficient value in the input box
Choose the unit you want to convert from (like W/m²·K)
Select the unit you want to convert to (like BTU/h·ft²·°F)
See the result appear instantly below
Use the conversion table for quick reference

Common Conversions:

• W/m²·K to BTU/h·ft²·°F converter
• BTU/h·ft²·°F to W/m²·K converter
• cal/s·cm²·°C to W/m²·K converter
• U-value converter for building design
• Thermal conductance converter

Common Examples of Heat Transfer Coefficient

Air Convection

Natural air: 5-25 W/m²·K

Forced air: 10-100 W/m²·K

Water Convection

Still water: 200-1000 W/m²·K

Flowing water: 500-10000 W/m²·K

Steam Condensation

Steam: 5000-25000 W/m²·K

Very high heat transfer

Why Convert Heat Transfer Coefficient Units?

Different countries and industries use different units for heat transfer coefficient. Engineers in Europe use W/m²·K, while American engineers often use BTU/h·ft²·°F. Scientists might use cal/s·cm²·°C for research work.

When you work with international teams or read technical papers from different countries, you need to convert between these units. Our heat transfer coefficient converter makes this easy. You can quickly change W/m²·K to BTU/h·ft²·°F or any other combination.

Building designers use U-value (thermal transmittance) which is the same as heat transfer coefficient. HVAC engineers need convection coefficient values for system design. All these are different names for the same type of measurement.

Frequently Asked Questions

What is the difference between W/m²·K and BTU/h·ft²·°F?

W/m²·K is the metric unit used worldwide, while BTU/h·ft²·°F is the imperial unit used mainly in the United States. To convert W/m²·K to BTU/h·ft²·°F, divide by 5.67826.

Is heat transfer coefficient the same as U-value?

Yes, U-value and heat transfer coefficient mean the same thing. U-value is commonly used in building and construction, while heat transfer coefficient is used in engineering.

How accurate is this heat transfer coefficient converter?

Our converter uses precise conversion factors and shows results up to 8 decimal places. The calculations are accurate for all engineering and scientific applications.

Can I convert thermal conductance with this tool?

Yes, thermal conductance and heat transfer coefficient use the same units. You can use this converter for thermal conductance, convection coefficient, and thermal transmittance values.