Convert Fahrenheit to Rankine
72 degrees Fahrenheit is 531.67 °R. The formula is °F + 459.67 — a scale conversion, not a factor.
72 °F is 531.67 °R. To convert degrees Fahrenheit to degrees Rankine, apply °F + 459.67. It is a scale conversion rather than a factor: the two scales differ in where zero sits as well as in the size of a degree. Check it against a fixed point: water freezes at 32 °F, which is 491.67 °R. Both scales are defined off the kelvin, which has been fixed since 2019 by the Boltzmann constant.
Factor checked against the defining standard · How we check
- °F + 459.67
72 + 459.67531.67 °R
72 degrees Fahrenheit in every temperature unit
| Unit | Value | Formula |
|---|---|---|
| degrees Celsius | 22.22222222 °C | (°F − 32) × 5/9 |
| degrees Fahrenheit (as entered) | 72 °F | — |
| kelvins | 295.3722222 K | (°F − 32) × 5/9 + 273.15 |
| degrees Rankine | 531.67 °R | °F + 459.67 |
Each scale is defined off the kelvin, so these are exact relations rather than measured ones — only the display is rounded.
How do you convert degrees Fahrenheit to degrees Rankine? The converter and the working
- 1.Take the temperature in degrees Fahrenheit.
- 2.Apply °F + 459.67 — the two scales differ in where zero sits as well as in how big a degree is, so this is a line rather than a single multiplication.
- 3.Sanity-check against a fixed point: 32 °F is 491.67 °R, where water freezes.
Worked example: 25 degrees Fahrenheit to degrees Rankine
- Formula
- °F + 459.67 = °R
- Arithmetic
- 25 + 459.67 = 484.67 °R
- Answer
- 25 °F = 484.67 °R
The relation is exact by definition — both scales are fixed to the kelvin — so only the display is rounded.
Degrees Fahrenheit to degrees Rankine conversion table
| Degrees Fahrenheit | Degrees Rankine |
|---|---|
| -40 °F | 419.67 °R |
| 0 °F | 459.67 °R |
| 20 °F | 479.67 °R |
| 32 °F | 491.67 °R |
| 40 °F | 499.67 °R |
| 50 °F | 509.67 °R |
| 60 °F | 519.67 °R |
| 70 °F | 529.67 °R |
| 72 °F | 531.67 °R |
| 80 °F | 539.67 °R |
| 90 °F | 549.67 °R |
| 98.6 °F | 558.27 °R |
| 100 °F | 559.67 °R |
| 212 °F | 671.67 °R |
| 325 °F | 784.67 °R |
| 350 °F | 809.67 °R |
| 375 °F | 834.67 °R |
| 400 °F | 859.67 °R |
| 425 °F | 884.67 °R |
| 450 °F | 909.67 °R |
What is a degree Fahrenheit?
The US everyday scale, with water freezing at 32 and boiling at 212 — 180 degrees apart, which is why a Fahrenheit degree is exactly five ninths of a Celsius one. Daniel Fahrenheit set his zero at the coldest temperature he could reproduce in 1724, a brine ice bath.
What is a degree Rankine?
Absolute zero counted in Fahrenheit-sized degrees, so 0 °R is −459.67 °F. US thermodynamics and combustion work still uses it, because it keeps the familiar degree size while removing the arbitrary zero.
The points to check a conversion against
water freezes at 32 °F, which is 491.67 °R; body temperature at 98.6 °F, which is 558.27 °R; water boils at 212 °F, which is 671.67 °R. Absolute zero is -459.67 °F and 0 °R — nothing is colder, which is why a converter returning a temperature below it is wrong rather than merely cold.
Every temperature unit here
The whole group — 4 units with their symbols and the size of each one in kelvins — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a degree Fahrenheit.
Source: NIST — the kelvin and the International Temperature Scale
Cite this page
- APA
- Rule Calculator. (2026). Convert Degrees Fahrenheit to degrees Rankine. Rule Calculator. https://rulecalculators.com/convert/fahrenheit-to-rankine
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- "Convert Degrees Fahrenheit to degrees Rankine." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/fahrenheit-to-rankine.
- Chicago
- Rule Calculator. "Convert Degrees Fahrenheit to degrees Rankine." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/fahrenheit-to-rankine.
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Questions people actually ask
- What is the formula to convert degrees Fahrenheit to degrees Rankine?
- °F + 459.67. Unlike every other conversion on this site, this is not a multiplication: the two scales put zero in different places, so the shift matters as much as the step size.
- What is 32 °F in degrees Rankine?
- 491.67 °R. That is the freezing point of water, and it is the fastest way to check any converter — including this one.
- Where do the Celsius and Fahrenheit scales meet?
- At −40. It is the one reading where the two scales agree, which is why "forty below" needs no unit. In kelvins that point is 233.15 K, and in Rankine 419.67 °R.
- What is absolute zero in degrees Rankine?
- 0 °R. Nothing can be colder: it is the point where a system holds no thermal energy to give up, and the kelvin and Rankine scales both start there rather than at an arbitrary reference.
Other temperature conversions
Degrees Rankine to degrees Fahrenheit — the same conversion the other way.