iSmart Measure
Open converter →
Fahrenheit to Celsius
Convert fahrenheit (°F) to celsius (°C) — with the exact factor, a quick-reference table and a free converter that works offline.
°C = (°F − 32) × 5/9
Try it
Open the free converter with this conversion pre-loaded — no sign-up, works offline after first load.
Conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.77778 °C |
| 32 °F | 0 °C |
| 68 °F | 20 °C |
| 98.6 °F | 37 °C |
| 212 °F | 100 °C |
| 350 °F | 176.6667 °C |
| 500 °F | 260 °C |
How the conversion works
Fahrenheit and Celsius are temperature scales related by an exact formula: °C = (°F − 32) × 5/9. Used in US for everyday temperature.
FAQ
What is 68 °F in Celsius?
68 °F equals 20 °C.
How do I convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9.
Is the conversion exact?
Yes — the relationship between Fahrenheit and Celsius is an exact defined formula (NIST SP 811).
Related conversions
Conversion factors: NIST SP 811. Computed by the same engine that powers the app.
Powered by iSmart Web