Choose a Measurement
Select a measurement and convert between different units
Single conversion
To convert from degree Rankine (R) to degree Celsius (C), use the following formula:
Let's convert 5 degree Rankine (R) to degree Celsius (C).
Using the formula:
Therefore, 5 degree Rankine (R) is equal to degree Celsius (C).
Here are some quick reference conversions from degree Rankine (R) to degree Celsius (C):
| degrees Rankine | degrees Celsius |
|---|---|
| 0.000001 R | C |
| 0.001 R | C |
| 0.1 R | C |
| 1 R | C |
| 2 R | C |
| 3 R | C |
| 4 R | C |
| 5 R | C |
| 6 R | C |
| 7 R | C |
| 8 R | C |
| 9 R | C |
| 10 R | C |
| 20 R | C |
| 30 R | C |
| 40 R | C |
| 50 R | C |
| 100 R | C |
| 1000 R | C |
| 10000 R | C |
For all Temperature converters, choose units using the From/To dropdowns above.
The Rankine scale (°R) is a temperature measurement system built on absolute zero, much like the Kelvin scale. However, Rankine is specifically designed to work with the Fahrenheit system. Think of it as the Fahrenheit version of Kelvin, used primarily by engineers in the United States.
The Rankine scale is an absolute temperature scale, meaning its starting point—0 °R—is absolute zero. This is the coldest possible temperature in the universe, where all atomic and molecular motion stops completely.
Unlike scales such as Celsius and Fahrenheit, which have arbitrary zero points, absolute scales begin at true zero. This distinction is vital in science and engineering, particularly when a calculation requires dividing one temperature by another.
Since Fahrenheit and Rankine share the same degree size, a change of 1°F is equivalent to a shift in 1°R.
To convert Fahrenheit (°F) to Rankine (°R), add 459.67 to the Fahrenheit value.
Formula: °R = °F + 459.67
Example: Water freezes at 32 °F. To find this on the Rankine scale, you would calculate: 32 + 459.67 = 491.67 °R
The Rankine scale is an absolute temperature scale that is comparable to the Kelvin scale. Its zero point, 0 °R, represents absolute zero, which is the theoretical temperature where all molecular movement comes to a halt.
Unlike relative scales such as Fahrenheit or Celsius, which have arbitrary zero points (like the freezing point of water), Rankine starts from a true fundamental zero.
You will almost exclusively find the Rankine scale in engineering and thermodynamics fields within the United States.
Many scientific laws, especially those related to gases and energy efficiency (such as the Ideal Gas Law), require an absolute temperature to yield accurate results.
Rankine allows engineers working with imperial units (feet, pounds, Fahrenheit) to perform these critical calculations without first converting everything to Kelvin, which is the absolute scale for the metric system. It streamlines their workflow by keeping all units consistent.
A degree Celsius (°C) is one of the most common units for measuring temperature around the world. As a key part of the metric system, it's used in everything from daily weather forecasts to scientific research. It offers a straightforward and rational method for gauging the temperature of an object. The plural version is degrees Celsius.
The Celsius scale is cleverly based on the physical properties of water. This relationship to a familiar substance makes it very easy to understand. Let's break it down simply:
This perfect 100-degree interval between freezing and boiling is why it was initially called a "centigrade" scale (from "centi-" meaning 100). This straightforward system is the reason Celsius is the standard for temperature measurement in most countries.
In 1742, the Swedish astronomer Anders Celsius introduced his temperature scale, but with a surprising twist—it was upside down! He originally set 100° as the freezing point of water and 0° as its boiling point.
It was only after his death that the scale was flipped to the familiar version we use today, making it far more logical. This change is often credited to fellow scientist Carl Linnaeus.
Because Celsius is a global standard, knowing how to convert it to other scales, such as Fahrenheit (°F) and Kelvin (K), is useful. Here are the simple formulas to do it: