Convert Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit
Instantly convert Kilojoules per Kilogram-Kelvin (kJ/(kg·K)) to BTU per Pound-Fahrenheit (BTU/(lb·°F)) with our free online calculator.
Formula: kJ/(kg·K) to BTU/(lb·°F) — multiply by 0.238846
Reference Table
| Kilojoules per Kilogram-Kelvin (kJ/(kg·K)) | BTU per Pound-Fahrenheit (BTU/(lb·°F)) |
|---|---|
| 1 | 0.238846 |
| 5 | 1.19423 |
| 10 | 2.38846 |
| 25 | 5.97115 |
| 50 | 11.9423 |
| 100 | 23.8846 |
How to Convert Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit
Formula
To convert Kilojoules per Kilogram-Kelvin (kJ/(kg·K)) to BTU per Pound-Fahrenheit (BTU/(lb·°F)): multiply by 0.238846
Step-by-Step
- Start with your value in Kilojoules per Kilogram-Kelvin (kJ/(kg·K)).
- Multiply by 0.238846 to perform the conversion.
- The result is your value expressed in BTU per Pound-Fahrenheit (BTU/(lb·°F)).
Conversion Factor
1 kJ/(kg·K) = 0.238846 BTU/(lb·°F)
Reverse Factor
1 BTU/(lb·°F) = 4.1868 kJ/(kg·K)
Worked Example
Convert 25 Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit: 25 kJ/(kg·K) = 5.97115 BTU/(lb·°F)
About Kilojoule per Kilogram-Kelvin (kJ/(kg·K))
A metric specific-heat unit equal to exactly 1,000 J/(kg·K). Because most common substances have specific heats in the 0.3-5 kJ/(kg·K) range, kJ/(kg·K) is the default working unit on every published thermodynamic property table (IAPWS-IF97 steam tables, NIST REFPROP refrigerant data, NASA CEA gas-property tables, Çengel-Boles 'Thermodynamics: An Engineering Approach' textbook, Moran-Shapiro 'Fundamentals of Engineering Thermodynamics'). Reference values: water at 25 °C is 4.186 kJ/(kg·K); structural steel ~0.49 kJ/(kg·K); aluminum 0.897 kJ/(kg·K); liquid nitrogen at saturation ~1.04 kJ/(kg·K); R-134a refrigerant vapour ~1.0 kJ/(kg·K) at saturation; R-1234yf (low-GWP automotive refrigerant) ~0.95 kJ/(kg·K). For ideal-gas calculations: dry air cp = 1.005 kJ/(kg·K), cv = 0.718 kJ/(kg·K), with ratio γ = cp/cv = 1.4 used in compressible-flow analysis. Steam tables in Çengel-Boles default to kJ/(kg·K) for both cp and cv.
About BTU per Pound-Fahrenheit (BTU/(lb·°F))
An imperial specific-heat unit (≈ 4,186.8 J/(kg·K)) widely used in US HVAC, petroleum engineering, thermodynamics, and process-engineering work. By the BTU's definition (1 BTU = heat to raise 1 lb of water by 1 °F at 60 °F), water has a specific heat of exactly 1.000 BTU/(lb·°F) — numerically identical to water's value in cal/(g·°C) since both unit systems calibrate to the same physical material. US steam tables (Keenan, Keyes, Hill, Moore; Power's Steam Tables), ASHRAE Handbook fundamentals chapters on humidification + air-property calculations, petroleum-reservoir thermal-recovery simulators (CMG STARS, Computer Modelling Group), and Perry's Chemical Engineers' Handbook all default to BTU/(lb·°F) for cp / cv values. Reference values: ideal air cp = 0.240 BTU/(lb·°F), cv = 0.171 BTU/(lb·°F); structural steel 0.107 BTU/(lb·°F); aluminum 0.214 BTU/(lb·°F); typical engineering polymer 0.3-0.5 BTU/(lb·°F). Convert BTU/(lb·°F) to J/(kg·K) by multiplying by 4,186.8; to kJ/(kg·K) by multiplying by 4.187.
Quick Facts
- 1 Kilojoule per Kilogram-Kelvin equals 0.238846 BTU per Pound-Fahrenheit
- 1 BTU per Pound-Fahrenheit equals 4.1868 Kilojoules per Kilogram-Kelvin
- Kilojoule per Kilogram-Kelvin is a unit of specific heat capacity
- BTU per Pound-Fahrenheit is a unit of specific heat capacity
- This conversion is commonly used in thermal design, material selection, and climate modelling
- The Kilojoule per Kilogram-Kelvin belongs to the metric system
- The BTU per Pound-Fahrenheit belongs to the imperial system
Common Kilojoule per Kilogram-Kelvin to BTU per Pound-Fahrenheit Conversions
| Kilojoules per Kilogram-Kelvin (kJ/(kg·K)) | BTU per Pound-Fahrenheit (BTU/(lb·°F)) |
|---|---|
| 0.01 | 0.00238846 |
| 0.1 | 0.0238846 |
| 0.25 | 0.0597115 |
| 0.5 | 0.119423 |
| 1 | 0.238846 |
| 2 | 0.477692 |
| 3 | 0.716538 |
| 5 | 1.19423 |
| 10 | 2.38846 |
| 15 | 3.58269 |
| 20 | 4.77692 |
| 25 | 5.97115 |
| 50 | 11.9423 |
| 75 | 17.9134 |
| 100 | 23.8846 |
| 250 | 59.7115 |
| 500 | 119.423 |
| 1000 | 238.846 |
| 5000 | 1194.23 |
| 10000 | 2388.46 |
Understanding Kilojoules per Kilogram-Kelvin
The Kilojoule per Kilogram-Kelvin (symbol: kJ/(kg·K)) is a unit of specific heat capacity. A metric specific-heat unit equal to exactly 1,000 J/(kg·K). Because most common substances have specific heats in the 0.3-5 kJ/(kg·K) range, kJ/(kg·K) is the default working unit on every published thermodynamic property table (IAPWS-IF97 steam tables, NIST REFPROP refrigerant data, NASA CEA gas-property tables, Çengel-Boles 'Thermodynamics: An Engineering Approach' textbook, Moran-Shapiro 'Fundamentals of Engineering Thermodynamics'). Reference values: water at 25 °C is 4.186 kJ/(kg·K); structural steel ~0.49 kJ/(kg·K); aluminum 0.897 kJ/(kg·K); liquid nitrogen at saturation ~1.04 kJ/(kg·K); R-134a refrigerant vapour ~1.0 kJ/(kg·K) at saturation; R-1234yf (low-GWP automotive refrigerant) ~0.95 kJ/(kg·K). For ideal-gas calculations: dry air cp = 1.005 kJ/(kg·K), cv = 0.718 kJ/(kg·K), with ratio γ = cp/cv = 1.4 used in compressible-flow analysis. Steam tables in Çengel-Boles default to kJ/(kg·K) for both cp and cv.
It belongs to the metric measurement system.
Kilojoules per Kilogram-Kelvin are commonly used in thermal design, material selection, and climate modelling.
Understanding BTU per Pound-Fahrenheit
The BTU per Pound-Fahrenheit (symbol: BTU/(lb·°F)) is a unit of specific heat capacity. An imperial specific-heat unit (≈ 4,186.8 J/(kg·K)) widely used in US HVAC, petroleum engineering, thermodynamics, and process-engineering work. By the BTU's definition (1 BTU = heat to raise 1 lb of water by 1 °F at 60 °F), water has a specific heat of exactly 1.000 BTU/(lb·°F) — numerically identical to water's value in cal/(g·°C) since both unit systems calibrate to the same physical material. US steam tables (Keenan, Keyes, Hill, Moore; Power's Steam Tables), ASHRAE Handbook fundamentals chapters on humidification + air-property calculations, petroleum-reservoir thermal-recovery simulators (CMG STARS, Computer Modelling Group), and Perry's Chemical Engineers' Handbook all default to BTU/(lb·°F) for cp / cv values. Reference values: ideal air cp = 0.240 BTU/(lb·°F), cv = 0.171 BTU/(lb·°F); structural steel 0.107 BTU/(lb·°F); aluminum 0.214 BTU/(lb·°F); typical engineering polymer 0.3-0.5 BTU/(lb·°F). Convert BTU/(lb·°F) to J/(kg·K) by multiplying by 4,186.8; to kJ/(kg·K) by multiplying by 4.187.
It belongs to the imperial measurement system.
BTU per Pound-Fahrenheit are commonly used in thermal design, material selection, and climate modelling.
Why Convert Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit?
Converting between Kilojoules per Kilogram-Kelvin and BTU per Pound-Fahrenheit is a frequent requirement for engineers, scientists, and students working with specific heat capacity 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 specific heat capacity conversion is essential.
Frequently Asked Questions
How do I convert Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit?
A metric specific-heat unit equal to exactly 1,000 J/(kg·K). To convert Kilojoules per Kilogram-Kelvin to BTU per Pound-Fahrenheit, multiply by 0.238846. For example, 25 kJ/(kg·K) equals 5.97115 BTU/(lb·°F).
How many BTU per Pound-Fahrenheit are in 1 Kilojoule per Kilogram-Kelvin?
There are 0.238846 BTU per Pound-Fahrenheit in 1 Kilojoule per Kilogram-Kelvin.
How many Kilojoules per Kilogram-Kelvin are in 1 BTU per Pound-Fahrenheit?
There are 4.1868 Kilojoules per Kilogram-Kelvin in 1 BTU per Pound-Fahrenheit.
What is the formula for Kilojoule per Kilogram-Kelvin to BTU per Pound-Fahrenheit conversion?
The formula is: multiply by 0.238846. This means 1 kJ/(kg·K) = 0.238846 BTU/(lb·°F).
Is a Kilojoule per Kilogram-Kelvin bigger than a BTU per Pound-Fahrenheit?
Yes. One Kilojoule per Kilogram-Kelvin is larger than one BTU per Pound-Fahrenheit because 1 kJ/(kg·K) equals 0.238846 BTU/(lb·°F), which is less than 1.
When do you need to convert between Kilojoules per Kilogram-Kelvin and BTU per Pound-Fahrenheit?
An imperial specific-heat unit (≈ 4,186. Kilojoule per Kilogram-Kelvin and BTU per Pound-Fahrenheit are both specific heat 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.