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.