Convert Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit
Instantly convert Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) to BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) with our free online calculator.
Formula: kcal/(hr·m²·°C) to BTU/(hr·ft²·°F) — multiply by 0.204816
Reference Table
| Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) | BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) |
|---|---|
| 1 | 0.204816 |
| 5 | 1.02408 |
| 10 | 2.04816 |
| 25 | 5.12041 |
| 50 | 10.2408 |
| 100 | 20.4816 |
How to Convert Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit
Formula
To convert Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) to BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)): multiply by 0.204816
Step-by-Step
- Start with your value in Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)).
- Multiply by 0.204816 to perform the conversion.
- The result is your value expressed in BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)).
Conversion Factor
1 kcal/(hr·m²·°C) = 0.204816 BTU/(hr·ft²·°F)
Reverse Factor
1 BTU/(hr·ft²·°F) = 4.88242 kcal/(hr·m²·°C)
Worked Example
Convert 25 Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit: 25 kcal/(hr·m²·°C) = 5.12041 BTU/(hr·ft²·°F)
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.
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.
Quick Facts
- 1 Kilocalorie per Hour-Square Meter-Celsius equals 0.204816 BTU per Hour-Square Foot-Fahrenheit
- 1 BTU per Hour-Square Foot-Fahrenheit equals 4.88242 Kilocalories per Hour-Square Meter-Celsius
- Kilocalorie per Hour-Square Meter-Celsius is a unit of heat transfer coefficient
- BTU per Hour-Square Foot-Fahrenheit is a unit of heat transfer coefficient
- This conversion is commonly used in heat exchanger design, HVAC engineering, and process optimization
- The Kilocalorie per Hour-Square Meter-Celsius belongs to the metric system
- The BTU per Hour-Square Foot-Fahrenheit belongs to the imperial system
Common Kilocalorie per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit Conversions
| Kilocalories per Hour-Square Meter-Celsius (kcal/(hr·m²·°C)) | BTU per Hour-Square Foot-Fahrenheit (BTU/(hr·ft²·°F)) |
|---|---|
| 0.01 | 0.00204816 |
| 0.1 | 0.0204816 |
| 0.25 | 0.0512041 |
| 0.5 | 0.102408 |
| 1 | 0.204816 |
| 2 | 0.409633 |
| 3 | 0.614449 |
| 5 | 1.02408 |
| 10 | 2.04816 |
| 15 | 3.07224 |
| 20 | 4.09633 |
| 25 | 5.12041 |
| 50 | 10.2408 |
| 75 | 15.3612 |
| 100 | 20.4816 |
| 250 | 51.2041 |
| 500 | 102.408 |
| 1000 | 204.816 |
| 5000 | 1024.08 |
| 10000 | 2048.16 |
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.
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.
Why Convert Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit?
Converting between Kilocalories per Hour-Square Meter-Celsius and BTU per Hour-Square Foot-Fahrenheit 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 Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit?
A legacy metric unit of heat-transfer coefficient equal to exactly 1. To convert Kilocalories per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit, multiply by 0.204816. For example, 25 kcal/(hr·m²·°C) equals 5.12041 BTU/(hr·ft²·°F).
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.
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.
What is the formula for Kilocalorie per Hour-Square Meter-Celsius to BTU per Hour-Square Foot-Fahrenheit conversion?
The formula is: multiply by 0.204816. This means 1 kcal/(hr·m²·°C) = 0.204816 BTU/(hr·ft²·°F).
Is a Kilocalorie per Hour-Square Meter-Celsius bigger than a BTU per Hour-Square Foot-Fahrenheit?
Yes. One Kilocalorie per Hour-Square Meter-Celsius is larger than one BTU per Hour-Square Foot-Fahrenheit because 1 kcal/(hr·m²·°C) equals 0.204816 BTU/(hr·ft²·°F), which is less than 1.
When do you need to convert between Kilocalories per Hour-Square Meter-Celsius and BTU per Hour-Square Foot-Fahrenheit?
An imperial heat-transfer-coefficient unit (≈ 5. Kilocalorie per Hour-Square Meter-Celsius and BTU per Hour-Square Foot-Fahrenheit 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.