Fahrenheit to Celsius
Fahrenheit sets 32° at water's freezing point and 212° at its boiling point, still used for everyday temperatures in the US. Celsius sets 0° at water's freezing point and 100° at its boiling point at sea level, the standard scale in most of the world. 1 °F equals ≈-17.2222 °C, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to temperature, measured here against temperature's base unit (°C) — every other temperature unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
°C = °F × ≈-17.2222
°F = °C × 33.8
Worked example: 5 °F × ≈-17.2222 = -15 °C.
Conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 1 °F | ≈-17.2222 °C |
| 2 °F | ≈-16.6667 °C |
| 3 °F | ≈-16.1111 °C |
| 5 °F | -15 °C |
| 10 °F | ≈-12.2222 °C |
| 20 °F | ≈-6.66667 °C |
| 25 °F | ≈-3.88889 °C |
| 50 °F | 10 °C |
| 100 °F | ≈37.7778 °C |
| 250 °F | ≈121.111 °C |
| 500 °F | 260 °C |
| 1,000 °F | ≈537.778 °C |
Frequently asked
- How many Celsius in a fahrenheit?
- 1 °F equals ≈-17.2222 °C.
- How do I convert Fahrenheit to Celsius?
- Multiply the value in °F by ≈-17.2222 to get °C. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Fahrenheit and Celsius are both defined by a fixed conversion factor to temperature's base unit (°C), so the result shown is exact to the precision displayed, not an approximation.