[Glossary](https://useratio.app/glossary) › Units and data # Celsius and Fahrenheit Two temperature scales. Water freezes at 0 °C and 32 °F. To go from Fahrenheit to Celsius, subtract 32 and multiply by 5/9. Body temperature, 98.6 °F, is 37 °C. Temperature is the one common conversion that is not a plain multiplication. Ratio does it for you with “in”. ## In Ratio | You type | Ratio shows | | --- | --- | | `100 f in c` | 37.78 °C | ## Related [Unit converter](https://useratio.app/unit-converter) · [All terms](https://useratio.app/glossary) [Try Ratio free for 7 days](https://useratio.app/download) Source: https://useratio.app/glossary/celsius-fahrenheit