Convert BTU per Rankine to Calories per Kelvin
Instantly convert BTU per Rankine (BTU/°R) to Calories per Kelvin (cal/K) with our free online calculator.
Formula: BTU/°R to cal/K — multiply by 453.898
Reference Table
| BTU per Rankine (BTU/°R) | Calories per Kelvin (cal/K) |
|---|---|
| 1 | 453.898 |
| 5 | 2269.49 |
| 10 | 4538.98 |
| 25 | 11347.5 |
| 50 | 22694.9 |
| 100 | 45389.8 |
How to Convert BTU per Rankine to Calories per Kelvin
Formula
To convert BTU per Rankine (BTU/°R) to Calories per Kelvin (cal/K): multiply by 453.898
Step-by-Step
- Start with your value in BTU per Rankine (BTU/°R).
- Multiply by 453.898 to perform the conversion.
- The result is your value expressed in Calories per Kelvin (cal/K).
Conversion Factor
1 BTU/°R = 453.898 cal/K
Reverse Factor
1 cal/K = 0.00220314 BTU/°R
Worked Example
Convert 25 BTU per Rankine to Calories per Kelvin: 25 BTU/°R = 11347.5 cal/K
About BTU per Rankine (BTU/°R)
An imperial entropy unit (1 BTU/°R ≈ 1,899 J/K) used in US thermodynamic cycle analysis — steam tables, refrigeration-cycle design, and gas-cycle calculations. Most US-edition thermodynamics textbooks list entropy values in BTU/(lb·°R) for mass-specific entropy; this unit is the absolute-entropy equivalent.
About Calorie per Kelvin (cal/K)
A CGS entropy unit (1 cal/K = 4.184 J/K) that appears in legacy chemistry and biochemistry literature. Standard entropies of biomolecules, reaction entropy changes, and protein-folding entropy are still occasionally reported in cal/(K·mol) or cal/K in older or specific-field papers.
Quick Facts
- 1 BTU per Rankine equals 453.898 Calories per Kelvin
- 1 Calorie per Kelvin equals 0.00220314 BTU per Rankine
- BTU per Rankine is a unit of entropy
- Calorie per Kelvin is a unit of entropy
- This conversion is commonly used in thermodynamics, refrigeration cycles, and chemical engineering
- The BTU per Rankine belongs to the imperial system
- The Calorie per Kelvin belongs to the metric system
Common BTU per Rankine to Calorie per Kelvin Conversions
| BTU per Rankine (BTU/°R) | Calories per Kelvin (cal/K) |
|---|---|
| 0.01 | 4.53898 |
| 0.1 | 45.3898 |
| 0.25 | 113.475 |
| 0.5 | 226.949 |
| 1 | 453.898 |
| 2 | 907.796 |
| 3 | 1361.69 |
| 5 | 2269.49 |
| 10 | 4538.98 |
| 15 | 6808.47 |
| 20 | 9077.96 |
| 25 | 11347.5 |
| 50 | 22694.9 |
| 75 | 34042.4 |
| 100 | 45389.8 |
| 250 | 113475 |
| 500 | 226949 |
| 1000 | 453898 |
| 5000 | 2269490 |
| 10000 | 4538980 |
Understanding BTU per Rankine
The BTU per Rankine (symbol: BTU/°R) is a unit of entropy. An imperial entropy unit (1 BTU/°R ≈ 1,899 J/K) used in US thermodynamic cycle analysis — steam tables, refrigeration-cycle design, and gas-cycle calculations. Most US-edition thermodynamics textbooks list entropy values in BTU/(lb·°R) for mass-specific entropy; this unit is the absolute-entropy equivalent.
It belongs to the imperial measurement system.
BTU per Rankine are commonly used in thermodynamics, refrigeration cycles, and chemical engineering.
Understanding Calories per Kelvin
The Calorie per Kelvin (symbol: cal/K) is a unit of entropy. A CGS entropy unit (1 cal/K = 4.184 J/K) that appears in legacy chemistry and biochemistry literature. Standard entropies of biomolecules, reaction entropy changes, and protein-folding entropy are still occasionally reported in cal/(K·mol) or cal/K in older or specific-field papers.
It belongs to the metric measurement system.
Calories per Kelvin are commonly used in thermodynamics, refrigeration cycles, and chemical engineering.
Why Convert BTU per Rankine to Calories per Kelvin?
Converting between BTU per Rankine and Calories per Kelvin is a frequent requirement for engineers, scientists, and students working with entropy 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 entropy conversion is essential.
Frequently Asked Questions
How do I convert BTU per Rankine to Calories per Kelvin?
An imperial entropy unit (1 BTU/°R ≈ 1,899 J/K) used in US thermodynamic cycle analysis — steam tables, refrigeration-cycle design, and gas-cycle calculations. To convert BTU per Rankine to Calories per Kelvin, multiply by 453.898. For example, 25 BTU/°R equals 11347.5 cal/K.
How many Calories per Kelvin are in 1 BTU per Rankine?
There are 453.898 Calories per Kelvin in 1 BTU per Rankine.
How many BTU per Rankine are in 1 Calorie per Kelvin?
There are 0.00220314 BTU per Rankine in 1 Calorie per Kelvin.
What is the formula for BTU per Rankine to Calorie per Kelvin conversion?
The formula is: multiply by 453.898. This means 1 BTU/°R = 453.898 cal/K.
Is a BTU per Rankine bigger than a Calorie per Kelvin?
No. One BTU per Rankine is smaller than one Calorie per Kelvin because 1 BTU/°R equals 453.898 cal/K, which is greater than 1.
When do you need to convert between BTU per Rankine and Calories per Kelvin?
A CGS entropy unit (1 cal/K = 4. BTU per Rankine and Calorie per Kelvin are both entropy 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.