Fahrenheit to Celsius formula

Conversion between temperature scales

Use the following equations to calculate temperature in degrees Celsius (t[C]) from degrees Fahrenheit (t[F]) and vice versa. More generally, the National Institute of Standards and Technology (NIST) website is one of the most reliable resources for information about systems of units and unit conversion.

Fahrenheit to Celsius

t[C] = (5/9)*(t[F] - 32)

Celsius to Fahrenheit

t[F] = (9/5)*t[C] + 32

About these equations

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

Read about temperature scales