Convert degrees Rankine to degrees Fahrenheit

1 °R=-458.67°F

Use the converter below to change any degrees Rankine value into degrees Fahrenheit instantly — with formula, conversion table, and real-world examples.

You have

Equals

-458.67

Conversion formula

Forward

°F = °R − 459.67

Reverse

°R = °F + 459.67

These temperature formulas are exact — no approximation involved.

About both units

From

Rankine

°R

The Rankine scale is an absolute scale whose degree size matches Fahrenheit. Zero °R is absolute zero (−459.67 °F). It is used in some US engineering thermodynamics — mainly aerospace, power plants and propulsion — where Fahrenheit-based calculations need an absolute reference.

Real-world: Room temperature ≈ 527 °R. Water boils at 671.67 °R. US rocket-engine thermodynamics textbooks use Rankine.

Read full rankine reference →

Fahrenheit

°F

The Fahrenheit scale places water's freezing point at 32 °F and its boiling point at 212 °F. Proposed by Daniel Gabriel Fahrenheit in 1724, it is still the official temperature unit in the US, Belize and a few Caribbean countries. Normal human body temperature is 98.6 °F.

Real-world: US room temperature 68–72 °F. Body temperature 98.6 °F. Fever 100.4 °F. Pizza oven 450 °F.

Read full fahrenheit reference →

Rankine to Fahrenheit conversion table

Common degrees Rankine to degrees Fahrenheit values for quick reference.

Rankine (°R)	Fahrenheit (°F)
-40 °R	-499.67 °F
-20 °R	-479.67 °F
0 °R	-459.67 °F
10 °R	-449.67 °F
20 °R	-439.67 °F
25 °R	-434.67 °F
30 °R	-429.67 °F
37 °R	-422.67 °F
100 °R	-359.67 °F
200 °R	-259.67 °F

Tips & common mistakes

Quick tips

°R = °F + 459.67.
°R = K × 9/5. Identical absolute-zero anchor, different degree size.
Rankine is essentially obsolete outside specific US engineering specialisms.

Avoid these

Confusing Rankine with Réaumur (another historical scale).
Using Rankine outside US engineering contexts — nowhere else uses it.
Writing °R when Réaumur degree is meant — Réaumur is obsolete.

Frequently asked questions

How many degrees Fahrenheit in a rankine?

One rankine equals -458.67 degrees Fahrenheit.

How do I convert degrees Rankine to degrees Fahrenheit?

Temperature conversion is non-linear. From Rankine to Fahrenheit use the specific formula — this tool applies it automatically.

What is 100 degrees Rankine in degrees Fahrenheit?

100 degrees Rankine equals -359.67 degrees Fahrenheit.

Is a rankine bigger than a fahrenheit?

Temperature units compare by scale, not by size of one degree. Rankine and Fahrenheit use different zero points.

How to convert degrees Rankine to degrees Fahrenheit without a calculator?

Use the mental shortcut relevant to these temperature scales — but for accuracy always verify with a calculator.

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