# 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.