Everyday Calculators & Converters
Temperature Converter
Type a value and see it on every scale at once.
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Common temperatures
The conversions people look up most.
| What | °C | °F | K | °R |
|---|---|---|---|---|
| Water freezes | 0 | 32 | 273.15 | 491.67 |
| Body temperature | 37 | 98.6 | 310.15 | 558.27 |
| Water boils (sea level) | 100 | 212 | 373.15 | 671.67 |
| Oven, moderate | 180 | 356 | 453.15 | 815.67 |
Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9, divide by 5, then add 32: °F = °C × 9/5 + 32. So 21 °C is 21 × 1.8 + 32 = 69.8 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5 and divide by 9: °C = (°F − 32) × 5/9. So 98.6 °F is 66.6 × 5/9 = 37 °C. Kelvin is °C + 273.15.
What is absolute zero?
The coldest possible temperature: 0 K, which is −273.15 °C, −459.67 °F and 0 °R. Nothing can be colder, so the converter doesn’t convert values below it.
What is Rankine?
An absolute scale that uses Fahrenheit-sized degrees, used in some engineering work. 0 °R is absolute zero, and °R = (°C + 273.15) × 9/5, which is the same as °F + 459.67.