Unit Converter (Temperature)
Converts between Fahrenheit, Celsius, and Kelvin
The temperature to convert
Temperature in Fahrenheit
Temperature in Celsius
Temperature in Kelvin
Frequently Asked Questions
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature, then multiply by 5/9. For example, 72F: (72-32) x 5/9 = 22.2C. A quick mental shortcut is to subtract 30 and divide by 2 for a rough estimate.
What is absolute zero?
Absolute zero is 0 Kelvin, -273.15 Celsius, or -459.67 Fahrenheit. It is the theoretical lowest possible temperature where all molecular motion stops. The Kelvin scale starts at absolute zero, making it useful for scientific calculations.
When is Fahrenheit the same as Celsius?
Fahrenheit and Celsius are equal at -40 degrees. Below that point, Fahrenheit values are higher than Celsius; above it, Fahrenheit values are higher. This is a fun trivia fact but rarely comes up in practical use.
Why does the US use Fahrenheit?
The Fahrenheit scale was developed by Daniel Fahrenheit in 1724 and adopted early in American history. Most other countries switched to Celsius during metrication in the 20th century. The US retained Fahrenheit for weather and everyday use, though science and medicine use Celsius.
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