Celsius to Rankine Converter
Enter the value that you want to convert Celsius (°C) to Rankine (°R) or Rankine to Celsius.Also written as °C to °R conversion.
1 Celsius = 493.4700000 Rankine
Formula: °R = (°C + 273.15) × 9/5
°C to °R — Celsius to Rankine
10 Celsius = 509.67000 Rankine
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Converting Celsius to Rankine
Understanding the Celsius
The Celsius scale was proposed by Swedish astronomer Anders Celsius in 1742, originally with 0° as the boiling point and 100° as freezing — later inverted.
Celsius (°C) is the most widely used temperature scale globally, adopted by every country except the United States for everyday use. It sets water's freezing point at 0°C and boiling point at 100°C at standard atmospheric pressure. The scale is used in weather forecasts, cooking, medicine (normal body temperature ≈ 37°C), scientific research, and industrial processes worldwide. Since 1954, it has been defined relative to the Kelvin scale: °C = K − 273.15.
The Rankine Explained
The Rankine scale is the Fahrenheit-based absolute temperature scale, starting at absolute zero (0°R = −459.67°F).
Developed by Scottish engineer William Rankine in 1859, the Rankine scale (°R) is used primarily in American engineering for thermodynamic calculations. It relates to Fahrenheit as Kelvin relates to Celsius — same degree size but offset to absolute zero. The Rankine cycle (steam power plant efficiency) and some US aerospace engineering calculations use this scale. To convert: °R = °F + 459.67.
Temperature Scales in Context
Temperature conversion is one of the few non-linear unit conversions people encounter daily. Celsius dominates scientific work and most countries, Fahrenheit remains standard in the US for weather and cooking, Kelvin is required in thermodynamics and gas law calculations, and Rankine appears in some US engineering applications. Converting between these scales requires formulas rather than simple multiplication.
Celsius to Rankine metric conversion table
| 0.01 °C | = | 491.68800 °R |
| 0.1 °C | = | 491.85000 °R |
| 1 °C | = | 493.47000 °R |
| 2 °C | = | 495.27000 °R |
| 3 °C | = | 497.07000 °R |
| 4 °C | = | 498.87000 °R |
| 5 °C | = | 500.67000 °R |
| 6 °C | = | 502.47000 °R |
| 7 °C | = | 504.27000 °R |
| 8 °C | = | 506.07000 °R |
| 9 °C | = | 507.87000 °R |
| 10 °C | = | 509.67000 °R |
| 11 °C | = | 511.47000 °R |
| 12 °C | = | 513.27000 °R |
| 13 °C | = | 515.07000 °R |
| 14 °C | = | 516.87000 °R |
| 15 °C | = | 518.67000 °R |
| 16 °C | = | 520.47000 °R |
| 17 °C | = | 522.27000 °R |
| 18 °C | = | 524.07000 °R |
| 19 °C | = | 525.87000 °R |
| 20 °C | = | 527.67000 °R |
| 30 °C | = | 545.67000 °R |
| 40 °C | = | 563.67000 °R |
| 50 °C | = | 581.67000 °R |
| 60 °C | = | 599.67000 °R |
| 70 °C | = | 617.67000 °R |
| 80 °C | = | 635.67000 °R |
| 90 °C | = | 653.67000 °R |
| 100 °C | = | 671.67000 °R |
| 200 °C | = | 851.67000 °R |
| 300 °C | = | 1031.67000 °R |
| 400 °C | = | 1211.67000 °R |
| 500 °C | = | 1391.67000 °R |
| 600 °C | = | 1571.67000 °R |
| 700 °C | = | 1751.67000 °R |
| 800 °C | = | 1931.67000 °R |
| 900 °C | = | 2111.67000 °R |
| 1000 °C | = | 2291.67000 °R |
How to Convert °C to °R (Celsius to Rankine)?
We can convert Celsius to Rankine by using an example.
Example:
Convert 20 Celsius to Rankine?
We know 1 Celsius = 493.4700000 Rankine; 1 Rankine = -272.5944444 Celsius.
20 Celsius = ___°R
20 × 493.4700000 = 527.67000 °R (we know 1 Celsius = 493.4700000 Rankine)
Answer:
20 Celsius = 527.67000 Rankine
How to Convert Celsius to Rankine
Rankine is the absolute scale based on Fahrenheit. Convert via: °R = (°C × 9/5) + 491.67:
- Write down the Celsius temperature.
- Multiply by 9/5 (or 1.8).
- Add 491.67.
- The result is Rankine.
Solved Examples
Question 1: Convert 100°C (boiling water) to Rankine.
Solution:
°R = (100 × 1.8) + 491.67
= 180 + 491.67
Answer: 100°C = 671.67°R
Question 2: Convert 0°C to Rankine.
Solution:
°R = (0 × 1.8) + 491.67
= 491.67
Answer: 0°C = 491.67°R (water freezing point)
Question 3: Convert -273.15°C to Rankine.
Solution:
°R = (-273.15 × 1.8) + 491.67
= -491.67 + 491.67
Answer: -273.15°C = 0°R (absolute zero)
Practice Questions
Try solving these on your own to test your understanding:
- Convert 25°C to Rankine. (Answer: 536.67°R)
- Convert -40°C to Rankine. (Answer: 419.67°R)
- What is 200°C in Rankine? (Answer: 851.67°R)
Rankine in US Thermodynamics
American engineering programs teach thermodynamics using Rankine alongside Fahrenheit, while the rest of the world uses Kelvin with Celsius. The Rankine cycle (steam power generation), Brayton cycle (gas turbines), and refrigeration cycles in US textbooks all use °R. When studying from American engineering references, Celsius users must convert to Rankine for equations to work correctly.
Key Takeaways
- °R = (°C × 9/5) + 491.67.
- 0°C = 491.67°R, 100°C = 671.67°R.
- -273.15°C = 0°R (absolute zero).
- Used in US engineering thermodynamics.
Celsius to Rankine Conversion Formula
°R = (°C + 273.15) × 9/5
1 Celsius = 493.4700000 Rankine
1 Rankine = -272.5944444 Celsius
Frequently Asked Questions
How many Rankine are in 1 Celsius?
1 Celsius equals 493.47000 Rankine. Note: Temperature conversion uses a formula, not simple multiplication.
How do I convert Celsius to Rankine?
Use the conversion formula shown above. For example, 500.67 Rankine equals 5 Celsius. Temperature scales have different zero points, so a formula (not simple multiplication) is required.
How do I convert Rankine to Celsius?
Use the reverse formula. 1 Rankine equals -272.59444 Celsius. See the formula section above for the exact equation.
What is 10 Celsius in Rankine?
10 Celsius is equal to 509.67000 Rankine.
What is 100 Celsius in Rankine?
100 Celsius is equal to 671.67000 Rankine.