Convert BTU per Hour-Square Foot-Fahrenheit to Kilocalories per Hour-Square Meter-Celsius
Instantly convert BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) to Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) with our free online calculator.
Formula: BTU/(hr·ft²·°F) to kcal/(hr·m²·°C) — multiply by 4.88242
Reference Table
| BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) | Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) |
|---|---|
| 1 | 4.88242 |
| 5 | 24.4121 |
| 10 | 48.8242 |
| 25 | 122.061 |
| 50 | 244.121 |
| 100 | 488.242 |
How to Convert BTU per Hour-Square Foot-Fahrenheit to Kilocalories per Hour-Square Meter-Celsius
Formula
To convert BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) to Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)): multiply by 4.88242
Step-by-Step
- Start with your value in BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)).
- Multiply by 4.88242 to perform the conversion.
- The result is your value expressed in Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)).
Conversion Factor
1 BTU/(hr·ft²·°F) = 4.88242 kcal/(hr·m²·°C)
Reverse Factor
1 kcal/(hr·m²·°C) = 0.204816 BTU/(hr·ft²·°F)
Worked Example
Convert 25 BTU per Hour-Square Foot-Fahrenheit to Kilocalories per Hour-Square Meter-Celsius: 25 BTU/(hr·ft²·°F) = 122.061 kcal/(hr·m²·°C)
About BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F))
An imperial heat-transfer-coefficient unit (≈ 5.6783 W/(m²·K) per NIST SP 811). Dominant in US HVAC design, building-envelope U-factor calculations per ASHRAE 90.1, refrigeration system design, and petroleum-industry / chemical-process heat-exchanger specifications per TEMA. ASHRAE Handbook fundamentals tables list film coefficients for building surfaces in BTU/(hr·ft²·°F): indoor air still-film 1.47 BTU/(hr·ft²·°F) (the universally-cited value for interior-wall winter heating-load calculations); exterior with 15 mph wind 6.0; exterior with 7.5 mph summer wind 4.0; roof underside ~1.47-1.61 depending on emissivity. US heat-exchanger overall heat-transfer coefficients (U-values) per Perry's: water-water shell-tube 150-300 BTU/(hr·ft²·°F); steam-condensing-to-water condenser 200-1,500; refrigerant-to-air finned coil 5-15 (air-side dominant); fuel-fired furnace radiation section 1-3 (radiation-dominated). Convert BTU/(hr·ft²·°F) to W/(m²·K) by multiplying by 5.6783; to kW/(m²·K) by multiplying by 5.6783 × 10⁻³.
About Kilocalorie per Hour-Square Meter-Celsius (kcal/(hr·m²·°C))
A legacy metric unit of heat-transfer coefficient equal to exactly 1.163 W/(m²·K). Persists in identifiable contexts: older European engineering literature (especially German DIN-era HVAC handbooks from pre-1980 e.g. Recknagel-Sprenger; French ASHRAE-equivalent French Fluides handbook; Italian process-plant documentation from the 1960s-80s), Russian / Soviet thermodynamic and heat-exchanger documentation that retained metric-calorie units into the post-Soviet transition period, and some older industrial heat-exchanger nameplates still in service in European chemical and refinery facilities (especially East German VEB-era equipment). Numerically convenient because typical convective h values fall in 1-1,000 kcal/(hr·m²·°C) range — a clean three-significant-figure span. Convert kcal/(hr·m²·°C) to W/(m²·K) by multiplying by 1.163; to BTU/(hr·ft²·°F) by multiplying by 0.2048. The unit is officially deprecated under ISO 80000 in favor of W/(m²·K), but remains useful for interpreting and modernizing legacy European technical documentation.
Quick Facts
- 1 BTU per Hour-Square Foot-Fahrenheit equals 4.88242 Kilocalories per Hour-Square Meter-Celsius
- 1 Kilocalorie per Hour-Square Meter-Celsius equals 0.204816 BTU per Hour-Square Foot-Fahrenheit
- BTU per Hour-Square Foot-Fahrenheit is a unit of heat transfer coefficient
- Kilocalorie per Hour-Square Meter-Celsius 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 Kilocalorie per Hour-Square Meter-Celsius belongs to the metric system
Common BTU per Hour-Square Foot-Fahrenheit to Kilocalorie per Hour-Square Meter-Celsius Conversions
| BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) | Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) |
|---|---|
| 0.01 | 0.0488242 |
| 0.1 | 0.488242 |
| 0.25 | 1.22061 |
| 0.5 | 2.44121 |
| 1 | 4.88242 |
| 2 | 9.76485 |
| 3 | 14.6473 |
| 5 | 24.4121 |
| 10 | 48.8242 |
| 15 | 73.2364 |
| 20 | 97.6485 |
| 25 | 122.061 |
| 50 | 244.121 |
| 75 | 366.182 |
| 100 | 488.242 |
| 250 | 1220.61 |
| 500 | 2441.21 |
| 1000 | 4882.42 |
| 5000 | 24412.1 |
| 10000 | 48824.2 |
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 (≈ 5.6783 W/(m²·K) per NIST SP 811). Dominant in US HVAC design, building-envelope U-factor calculations per ASHRAE 90.1, refrigeration system design, and petroleum-industry / chemical-process heat-exchanger specifications per TEMA. ASHRAE Handbook fundamentals tables list film coefficients for building surfaces in BTU/(hr·ft²·°F): indoor air still-film 1.47 BTU/(hr·ft²·°F) (the universally-cited value for interior-wall winter heating-load calculations); exterior with 15 mph wind 6.0; exterior with 7.5 mph summer wind 4.0; roof underside ~1.47-1.61 depending on emissivity. US heat-exchanger overall heat-transfer coefficients (U-values) per Perry's: water-water shell-tube 150-300 BTU/(hr·ft²·°F); steam-condensing-to-water condenser 200-1,500; refrigerant-to-air finned coil 5-15 (air-side dominant); fuel-fired furnace radiation section 1-3 (radiation-dominated). Convert BTU/(hr·ft²·°F) to W/(m²·K) by multiplying by 5.6783; to kW/(m²·K) by multiplying by 5.6783 × 10⁻³.
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 Kilocalories per Hour-Square Meter-Celsius
The Kilocalorie per Hour-Square Meter-Celsius (symbol: kcal/(hr·m²·°C)) is a unit of heat transfer coefficient. A legacy metric unit of heat-transfer coefficient equal to exactly 1.163 W/(m²·K). Persists in identifiable contexts: older European engineering literature (especially German DIN-era HVAC handbooks from pre-1980 e.g. Recknagel-Sprenger; French ASHRAE-equivalent French Fluides handbook; Italian process-plant documentation from the 1960s-80s), Russian / Soviet thermodynamic and heat-exchanger documentation that retained metric-calorie units into the post-Soviet transition period, and some older industrial heat-exchanger nameplates still in service in European chemical and refinery facilities (especially East German VEB-era equipment). Numerically convenient because typical convective h values fall in 1-1,000 kcal/(hr·m²·°C) range — a clean three-significant-figure span. Convert kcal/(hr·m²·°C) to W/(m²·K) by multiplying by 1.163; to BTU/(hr·ft²·°F) by multiplying by 0.2048. The unit is officially deprecated under ISO 80000 in favor of W/(m²·K), but remains useful for interpreting and modernizing legacy European technical documentation.
It belongs to the metric measurement system.
Kilocalories per Hour-Square Meter-Celsius are commonly used in heat exchanger design, HVAC engineering, and process optimization.
Why Convert BTU per Hour-Square Foot-Fahrenheit to Kilocalories per Hour-Square Meter-Celsius?
Converting between BTU per Hour-Square Foot-Fahrenheit and Kilocalories per Hour-Square Meter-Celsius 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 Kilocalories per Hour-Square Meter-Celsius?
An imperial heat-transfer-coefficient unit (≈ 5. To convert BTU per Hour-Square Foot-Fahrenheit to Kilocalories per Hour-Square Meter-Celsius, multiply by 4.88242. For example, 25 BTU/(hr·ft²·°F) equals 122.061 kcal/(hr·m²·°C).
How many Kilocalories per Hour-Square Meter-Celsius are in 1 BTU per Hour-Square Foot-Fahrenheit?
There are 4.88242 Kilocalories per Hour-Square Meter-Celsius in 1 BTU per Hour-Square Foot-Fahrenheit.
How many BTU per Hour-Square Foot-Fahrenheit are in 1 Kilocalorie per Hour-Square Meter-Celsius?
There are 0.204816 BTU per Hour-Square Foot-Fahrenheit in 1 Kilocalorie per Hour-Square Meter-Celsius.
What is the formula for BTU per Hour-Square Foot-Fahrenheit to Kilocalorie per Hour-Square Meter-Celsius conversion?
The formula is: multiply by 4.88242. This means 1 BTU/(hr·ft²·°F) = 4.88242 kcal/(hr·m²·°C).
Is a BTU per Hour-Square Foot-Fahrenheit bigger than a Kilocalorie per Hour-Square Meter-Celsius?
No. One BTU per Hour-Square Foot-Fahrenheit is smaller than one Kilocalorie per Hour-Square Meter-Celsius because 1 BTU/(hr·ft²·°F) equals 4.88242 kcal/(hr·m²·°C), which is greater than 1.
When do you need to convert between BTU per Hour-Square Foot-Fahrenheit and Kilocalories per Hour-Square Meter-Celsius?
A legacy metric unit of heat-transfer coefficient equal to exactly 1. BTU per Hour-Square Foot-Fahrenheit and Kilocalorie per Hour-Square Meter-Celsius 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.