Celsius to Rankine Converter
Temperature · unit-converter
Convert Celsius to Rankine with offset-aware formulas (not simple ratio scaling), step-by-step lines, and reference tables. Uses 273.15 for Celsius–Kelvin offsets, R = (9/5) × K for kelvin–rankine, and °F–R offset 459.67.
About Celsius
Celsius is a metric scale where 0 °C is the freezing point of water and 100 °C is the boiling point at standard atmospheric pressure. It shares the same step size as kelvin (1 K = 1 °C interval).
About Rankine
Rankine is an absolute scale with the same degree size as Fahrenheit (1 R interval = 1 °F interval). 0 R is absolute zero. Relationship: R = °F + 459.67, and R = (9/5) × K (exact ratio to kelvin).
How to convert Celsius to Rankine
From Celsius to Rankine: R = (°C + 273.15) × (9/5), i.e. convert to kelvin then multiply by 9/5.
0 °C = 491.67 R; 100 °C = 671.67 R (water boiling at 1 atm).
Unlike units with a single fixed ratio (meters to feet), absolute temperatures include an offset. Always use the full formula for this pair—do not “multiply only” by a scale factor unless you are computing a temperature difference (interval), where offsets cancel.
Examples
Example #1: Convert 491.67 c to Rankine
(491.670000°C + 273.15) × 9/5 = 1,376.676000 R
→ 1376.676 r
Example #2: Convert 671.67 c to Rankine
(671.670000°C + 273.15) × 9/5 = 1,700.676000 R
→ 1700.676 r
Summary
From Celsius to Rankine: R = (°C + 273.15) × (9/5), i.e. convert to kelvin then multiply by 9/5.
Relationship context
Converting Celsius to Rankine uses different zeros and step sizes. You cannot multiply by a single ratio alone for every pair—you first express the same physical temperature in an intermediate form (Celsius is used inside this tool), then map to Rankine. Unlike length or energy units, offsets matter for Celsius and Fahrenheit; kelvin and rankine are absolute scales linked by the exact factor 9/5.
Conversion tables
| Celsius (c) | Rankine (r) |
|---|---|
| -40 | 419.67 |
| -20 | 455.67 |
| -10 | 473.67 |
| 0 | 491.67 |
| Celsius (c) | Rankine (r) |
|---|---|
| 10 | 509.67 |
| 20 | 527.67 |
| 37 | 558.27 |
| 100 | 671.67 |