Fahrenheit to Celsius formula

Equations for conversion between temperature scales

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Conversion between temperature scales

Use the following equations to calculate temperature in degrees Celsius (t °C) from degrees Fahrenheit (t °F) and vice versa. The National Institute of Standards and Technology (NIST) website is a reliable resource for information about systems of units and unit conversion.

Fahrenheit to Celsius

t °C = (t °F - 32) × 5/9

Celsius to Fahrenheit

t °F = t °C × 9/5 + 32

About these equations

Curious about the numerical factors involved in these expressions? Here is a brief explanation.


Read about temperature scales