Temperature Conversion
Temperature conversion changes a temperature from one scale to another. To convert Celsius to Fahrenheit, multiply by 9/5 and add 32; to convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level.
Examples
20 °C = 20 × 9/5 + 32 = 68 °F. 98.6 °F = (98.6 − 32) × 5/9 = 37 °C.
Kelvin
Kelvin, used in science, equals Celsius + 273.15; −40 is the same in Celsius and Fahrenheit.
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Last updated: September 29, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.