Convert BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin
Instantly convert BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) to Watts per Square Meter-Kelvin (W/(m²·K)) with our free online calculator.
Formula: BTU/(hr·ft²·°F) to W/(m²·K) — multiply by 5.67826
Reference Table
| BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) | Watts per Square Meter-Kelvin (W/(m²·K)) |
|---|---|
| 1 | 5.67826 |
| 5 | 28.3913 |
| 10 | 56.7826 |
| 25 | 141.957 |
| 50 | 283.913 |
| 100 | 567.826 |
How to Convert BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin
Formula
To convert BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) to Watts per Square Meter-Kelvin (W/(m²·K)): multiply by 5.67826
Step-by-Step
- Start with your value in BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)).
- Multiply by 5.67826 to perform the conversion.
- The result is your value expressed in Watts per Square Meter-Kelvin (W/(m²·K)).
Conversion Factor
1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K)
Reverse Factor
1 W/(m²·K) = 0.17611 BTU/(hr·ft²·°F)
Worked Example
Convert 25 BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin: 25 BTU/(hr·ft²·°F) = 141.957 W/(m²·K)
About BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F))
An imperial heat-transfer-coefficient unit (1 BTU/(hr·ft²·°F) ≈ 5.678 W/(m²·K)). Dominant in US HVAC design, building-envelope calculations, and petroleum-industry heat-exchanger specifications. ASHRAE fundamentals tables list film coefficients for building surfaces in BTU/(hr·ft²·°F) — e.g., indoor air film is ~1.47, exterior with 15 mph wind is ~6.0.
About Watt per Square Meter-Kelvin (W/(m²·K))
The SI unit of heat-transfer coefficient h — the constant of proportionality between heat flux and temperature difference in Newton's law of cooling (q = h·ΔT). W/(m²·K) is the universal unit in heat-exchanger design and HVAC. Typical values: natural convection air ~5–25 W/(m²·K); forced-air 25–250; boiling water 2,500–100,000; filmwise condensation 5,000–15,000.
Quick Facts
- 1 BTU per Hour-Square Foot-Fahrenheit equals 5.67826 Watts per Square Meter-Kelvin
- 1 Watt per Square Meter-Kelvin equals 0.17611 BTU per Hour-Square Foot-Fahrenheit
- BTU per Hour-Square Foot-Fahrenheit is a unit of heat transfer coefficient
- Watt per Square Meter-Kelvin is a unit of heat transfer coefficient
- This conversion is commonly used in heat exchanger design, HVAC engineering, and process optimization
- The BTU per Hour-Square Foot-Fahrenheit belongs to the imperial system
- The Watt per Square Meter-Kelvin belongs to the metric system
Common BTU per Hour-Square Foot-Fahrenheit to Watt per Square Meter-Kelvin Conversions
| BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) | Watts per Square Meter-Kelvin (W/(m²·K)) |
|---|---|
| 0.01 | 0.0567826 |
| 0.1 | 0.567826 |
| 0.25 | 1.41956 |
| 0.5 | 2.83913 |
| 1 | 5.67826 |
| 2 | 11.3565 |
| 3 | 17.0348 |
| 5 | 28.3913 |
| 10 | 56.7826 |
| 15 | 85.1739 |
| 20 | 113.565 |
| 25 | 141.957 |
| 50 | 283.913 |
| 75 | 425.87 |
| 100 | 567.826 |
| 250 | 1419.57 |
| 500 | 2839.13 |
| 1000 | 5678.26 |
| 5000 | 28391.3 |
| 10000 | 56782.6 |
Understanding BTU per Hour-Square Foot-Fahrenheit
The BTU per Hour-Square Foot-Fahrenheit (symbol: BTU/(hr·ft²·°F)) is a unit of heat transfer coefficient. An imperial heat-transfer-coefficient unit (1 BTU/(hr·ft²·°F) ≈ 5.678 W/(m²·K)). Dominant in US HVAC design, building-envelope calculations, and petroleum-industry heat-exchanger specifications. ASHRAE fundamentals tables list film coefficients for building surfaces in BTU/(hr·ft²·°F) — e.g., indoor air film is ~1.47, exterior with 15 mph wind is ~6.0.
It belongs to the imperial measurement system.
BTU per Hour-Square Foot-Fahrenheit are commonly used in heat exchanger design, HVAC engineering, and process optimization.
Understanding Watts per Square Meter-Kelvin
The Watt per Square Meter-Kelvin (symbol: W/(m²·K)) is a unit of heat transfer coefficient. The SI unit of heat-transfer coefficient h — the constant of proportionality between heat flux and temperature difference in Newton's law of cooling (q = h·ΔT). W/(m²·K) is the universal unit in heat-exchanger design and HVAC. Typical values: natural convection air ~5–25 W/(m²·K); forced-air 25–250; boiling water 2,500–100,000; filmwise condensation 5,000–15,000.
It belongs to the metric measurement system.
Watts per Square Meter-Kelvin are commonly used in heat exchanger design, HVAC engineering, and process optimization.
Why Convert BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin?
Converting between BTU per Hour-Square Foot-Fahrenheit and Watts per Square Meter-Kelvin is a frequent requirement for engineers, scientists, and students working with heat transfer coefficient values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate heat transfer coefficient conversion is essential.
Frequently Asked Questions
How do I convert BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin?
An imperial heat-transfer-coefficient unit (1 BTU/(hr·ft²·°F) ≈ 5. To convert BTU per Hour-Square Foot-Fahrenheit to Watts per Square Meter-Kelvin, multiply by 5.67826. For example, 25 BTU/(hr·ft²·°F) equals 141.957 W/(m²·K).
How many Watts per Square Meter-Kelvin are in 1 BTU per Hour-Square Foot-Fahrenheit?
There are 5.67826 Watts per Square Meter-Kelvin in 1 BTU per Hour-Square Foot-Fahrenheit.
How many BTU per Hour-Square Foot-Fahrenheit are in 1 Watt per Square Meter-Kelvin?
There are 0.17611 BTU per Hour-Square Foot-Fahrenheit in 1 Watt per Square Meter-Kelvin.
What is the formula for BTU per Hour-Square Foot-Fahrenheit to Watt per Square Meter-Kelvin conversion?
The formula is: multiply by 5.67826. This means 1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K).
Is a BTU per Hour-Square Foot-Fahrenheit bigger than a Watt per Square Meter-Kelvin?
No. One BTU per Hour-Square Foot-Fahrenheit is smaller than one Watt per Square Meter-Kelvin because 1 BTU/(hr·ft²·°F) equals 5.67826 W/(m²·K), which is greater than 1.
When do you need to convert between BTU per Hour-Square Foot-Fahrenheit and Watts per Square Meter-Kelvin?
The SI unit of heat-transfer coefficient h — the constant of proportionality between heat flux and temperature difference in Newton's law of cooling (q = h·ΔT). BTU per Hour-Square Foot-Fahrenheit and Watt per Square Meter-Kelvin are both heat transfer coeff units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.