Btu per pound °F to Kilojoules per kilogram kelvin Converter
Quick answer: To convert Btu per pound °F to kilojoules per kilogram kelvin, multiply by 4.1868. For example, 10 Btu/(lb·°F) is 41.868 kJ/(kg·K). One btu per pound °f equals 4.1868 kJ/(kg·K).
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Use the Btu per pound °F to Kilojoules per kilogram kelvin Converter
Btu per pound °F to Kilojoules per kilogram kelvin formula and what each symbol means
kJ/(kg·K) = Btu/(lb·°F) × 4.1868
| Symbol | Meaning |
|---|---|
| Btu/(lb·°F) | Btu per pound °F |
| kJ/(kg·K) | Kilojoule per kilogram kelvin |
Btu per pound °F to Kilojoules per kilogram kelvin examples
1 Btu/(lb·°F)
1 Btu/(lb·°F) × 4.1868 = 4.1868 kJ/(kg·K).
10 Btu/(lb·°F)
10 Btu/(lb·°F) × 4.1868 = 41.868 kJ/(kg·K).
100 Btu/(lb·°F)
100 Btu/(lb·°F) × 4.1868 = 418.68 kJ/(kg·K).
Btu per pound °F compared with Kilojoules per kilogram kelvin
One Btu/(lb·°F) is 4.187 times as large as one kJ/(kg·K), so your number gets bigger when you convert Btu per pound °F to kilojoules per kilogram kelvin and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About Btu per pound °F and kilojoules per kilogram kelvin
Btu per pound °F (Btu/(lb·°F)): British thermal units per pound per Fahrenheit degree, 4,186.8 J/(kg·K). Kilojoule per kilogram kelvin (kJ/(kg·K)): Kilojoule per kilogram kelvin, 1,000 J/(kg·K).
How to calculate Btu per pound °F to Kilojoules per kilogram kelvin step by step
- Enter the value in Btu/(lb·°F) (the starting unit).
- Multiply by 4.1868, because 1 Btu/(lb·°F) = 4.1868 kJ/(kg·K).
- The product is the value in kJ/(kg·K). To go back, divide by 4.1868 or multiply by 0.2388459.
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How to read your Btu per pound °F to Kilojoules per kilogram kelvin result
Quick estimate: multiply by about 4.2 to get kilojoules per kilogram kelvin from Btu per pound °F; this is within 0.4% of the exact factor. Liquid water is about 4,184 J/(kg·K), which is the same as about 1 cal/(g·°C).
| BTU PER POUND °F | KILOJOULES PER KILOGRAM KELVIN |
|---|---|
| 1 | 4.1868 |
| 2 | 8.3736 |
| 5 | 20.934 |
| 10 | 41.868 |
| 20 | 83.736 |
| 50 | 209.34 |
| 100 | 418.68 |
| 1,000 | 4,186.8 |
Kilojoules per kilogram kelvin to Btu per pound °F: quick table
| KILOJOULES PER KILOGRAM KELVIN | BTU PER POUND °F |
|---|---|
| 1 | 0.2388459 |
| 5 | 1.194229 |
| 10 | 2.388459 |
| 25 | 5.971147 |
| 50 | 11.94229 |
| 100 | 23.88459 |
| 250 | 59.71147 |
| 500 | 119.4229 |
Common mistakes when calculating Btu per pound °F to Kilojoules per kilogram kelvin
- Mixing the thermochemical calorie (4.184 J) with the International Table calorie (4.1868 J).
- Dividing when you should multiply: from Btu/(lb·°F) to kJ/(kg·K) multiply by 4.1868; from kJ/(kg·K) to Btu/(lb·°F) divide by 4.1868.
Btu per pound °F to Kilojoules per kilogram kelvin FAQ
How many kJ/(kg·K) are in 1 Btu/(lb·°F)?
1 Btu/(lb·°F) equals 4.1868 kJ/(kg·K).
How many Btu/(lb·°F) are in 1 kJ/(kg·K)?
1 kJ/(kg·K) equals 0.2388459 Btu/(lb·°F).
Is 1 Btu/(lb·°F) = 4.1868 kJ/(kg·K) an exact conversion?
The factor is shown rounded to 7 significant figures (4.1868). The calculator above uses more digits.
What is a btu per pound °F (Btu/(lb·°F))?
British thermal units per pound per Fahrenheit degree, 4,186.8 J/(kg·K).
How can I estimate Btu per pound °F to kilojoules per kilogram kelvin in my head?
Quick estimate: multiply by about 4.2 to get kilojoules per kilogram kelvin from Btu per pound °F; this is within 0.4% of the exact factor.
What is 7 Btu/(lb·°F) in kilojoules per kilogram kelvin?
7 Btu/(lb·°F) = 29.3076 kJ/(kg·K) (since 7 × 4.1868).
What is 40 Btu/(lb·°F) in kilojoules per kilogram kelvin?
40 Btu/(lb·°F) = 167.472 kJ/(kg·K) (since 40 × 4.1868).
What is 200 Btu/(lb·°F) in kilojoules per kilogram kelvin?
200 Btu/(lb·°F) = 837.36 kJ/(kg·K) (since 200 × 4.1868).
How many decimals should I keep when converting Btu/(lb·°F) to kJ/(kg·K)?
Match the precision of your original measurement. For example, 41.868 kJ/(kg·K) rounds to 41.9 kJ/(kg·K) at 3 significant figures; keep more digits only for engineering or scientific work.
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)