This tool helps you calculate equivalent temperature values across multiple commonly used temperature scales with ease. The Kelvin and Rankine scales serve as absolute counterparts to the Celsius and Fahrenheit scales, respectively. These absolute scales start at zero, representing the theoretical minimum temperature possible. On the other hand, the zero points for Celsius and Fahrenheit were established based on observable physical phenomena, such as the freezing point of water. Use this tool for accurate temperature conversions and gain a deeper understanding of the relationships between these scales.
Celsius
Fahrenheit
Kelvin
Rankine
Celsius to Fahrenheit
[°F] = [°C] × 9/5 + 32
Celsius to Kelvin
[K] = [°C] + 273.15
Celsius to Rankine
[°R] = [°C] × 9/5 + 491.67
Fahrenheit to Celsius
[°C] = ([°F] - 32) × 5/9
Fahrenheit to Kelvin
[K] = ([°F] + 459.67) × 5/9
Fahrenheit to Rankine
[°R] = [°F] + 459.67
* The temperature conversion calculates the temperature of absolute zero or above.
Temperature Conversion Explained
Measuring temperature isn’t as easy as most of us think it is, how do we know what 100°F and 100°C really are?
About 300 years ago, measuring temperature was difficult to say the least. People only knew that things were hot or cold, freezing or boiling. There were no standard scales or devices so temperatures could vary from one manufacturer to the next using whatever measurement process or scale they deemed fit.
Daniel Gabriel Fahrenheit changed all of that in 1724 when he created a sealed thermometer with his scale based on the freezing point of salted water and the human body temperature. This was divided into a range of 96 increments. Fahrenheit’s thermometers could also be manufactured with precision and reliability, something that hadn’t been available before thus increasing their popularity and acceptance.
In 1742 Anders Celsius created a scale with 100 increments based on the freezing and boiling point of water. This scale was originally referred to as “degrees centigrade” because of the 100 increments in its scale. The name of the scale was officially changed to “Celsius” in 1948 to avoid confusion of measurements in other languages. Interestingly, Anders original scale had the boiling point of water set at 0 and the freezing point set at 100. He continued to use this scale for the rest of his life. It wasn’t until years later that the scale was reversed, and the freezing point of water was set to 0 and the boiling point 100.
While these two methods of measurement have proved to be very beneficial since their inception, they are both some of the most misspelled terms used today. Luckily, whether you use “Farenheit” or “Celcius” we all know what you mean.
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