Convert Fahrenheit to Celsius
Instant, accurate °F → °C conversion with a live converter, table and formula.
1 Fahrenheit = -17.2222 Celsius
Fahrenheit to Celsius table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0.5 | -17.5 |
| 1 | -17.2222 |
| 2 | -16.6667 |
| 5 | -15 |
| 10 | -12.2222 |
| 20 | -6.66667 |
| 50 | 10 |
| 100 | 37.7778 |
| 500 | 260 |
| 1000 | 537.778 |
Formula
This is a non-linear conversion — use the converter above or the table below for exact values. As a reference, 1 Fahrenheit = -17.2222 Celsius.
Example
10 Fahrenheit = -12.2222 Celsius.
What is a Fahrenheit?
Fahrenheit (°F) sets water's freezing at 32° and boiling at 212°, used in the US.
What is a Celsiu?
Celsius (°C) sets water's freezing point at 0° and boiling at 100°.
Real-world reference points
Room comfort sits near 21°C / 70°F; body temperature near 37°C / 98.6°F; water boils at 100°C / 212°F at sea level.
| Reference | Fahrenheit | Celsius |
|---|---|---|
| Home freezer | -0.4 °F | -18 °C |
| Comfortable room | 69.8 °F | 21 °C |
| Body temperature | 98.6 °F | 37 °C |
| Hot summer day | 104 °F | 40 °C |
| Baking oven | 356 °F | 180 °C |
| Water boils (sea level) | 212 °F | 100 °C |
Mistakes to avoid with temperature conversions
- Doubling °C does not double °F — the scales have different zero points; use the formula, not proportion.
- Forgetting −40 is the one temperature where Celsius and Fahrenheit agree.
- Writing 'degrees Kelvin' — Kelvin is an absolute scale with no degree sign (300 K, not 300°K).
Frequently asked questions
How many Celsius in a Fahrenheit?+
1 Fahrenheit = -17.2222 Celsius.
How do I convert Fahrenheit to Celsius?+
Enter the value in the Fahrenheit box above and the Celsius value appears instantly. You can also type in the Celsius box to convert the other way.
Is this °F to °C converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.