Quick answer: 1 Fahrenheit in Celsius
1 °F equals -17.222222 °C. Use the free calculator above for any value — it applies the exact Fahrenheit–Celsius formula with no signup needed.
Temperature units
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About Temperature Converter
The Temperature Converter converts between 4 different units, including Celsius, Fahrenheit, Kelvin, Rankine. The base unit is the Celsius, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Celsius = 33.8 Fahrenheit, 274.15 Kelvin, 493.47 Rankine.
Last updated: 2026-09-15
Temperature conversion factors
| Unit | Symbol | Value in Celsius |
|---|---|---|
| Celsius | °C | 1 °C = 1 °C |
| Fahrenheit | °F | 1 °F = -17.222222 °C |
| Kelvin | K | 1 K = -272.15 °C |
| Rankine | °R | 1 °R = -272.594444 °C |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 Fahrenheit in Celsius?
- Convert 1 °F with the Fahrenheit–Celsius formula
- 1 Fahrenheit = -17.222222 Celsius
How much is 5 Fahrenheit in Celsius?
- Convert 5 °F with the Fahrenheit–Celsius formula
- 5 Fahrenheit = -15 Celsius
How much is 25 Fahrenheit in Celsius?
- Convert 25 °F with the Fahrenheit–Celsius formula
- 25 Fahrenheit = -3.888889 Celsius
Quick Conversion Reference Table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 1 °F (Fahrenheit) | -17.222222 °C (Celsius) |
| 2 °F (Fahrenheit) | -16.666667 °C (Celsius) |
| 5 °F (Fahrenheit) | -15 °C (Celsius) |
| 10 °F (Fahrenheit) | -12.222222 °C (Celsius) |
| 20 °F (Fahrenheit) | -6.666667 °C (Celsius) |
| 50 °F (Fahrenheit) | 10 °C (Celsius) |
| 100 °F (Fahrenheit) | 37.777778 °C (Celsius) |
| 500 °F (Fahrenheit) | 260 °C (Celsius) |
| 1000 °F (Fahrenheit) | 537.777778 °C (Celsius) |
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How to Use This Converter
- Enter your value
Type any number into the input field above. The result updates instantly as you type — no button needed.
- Choose your units
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FAQ
How much is 1 Fahrenheit in Celsius?
1 Fahrenheit = -17.222222 Celsius.
How do I convert Fahrenheit to Celsius?
Enter your value in Fahrenheit into the converter above and the result in Celsius appears instantly. For reference, 1 °F equals -17.222222 °C.
What is the formula for Fahrenheit to Celsius?
There is no single multiplier because this conversion uses an offset formula — see the formula card above. For example, 5 °F = -15 °C.
Is this Fahrenheit to Celsius converter free and accurate?
Yes. This Fahrenheit to Celsius converter is 100% free, uses the exact international conversion factor (-17.222222), and works on any device with no signup.
How do I convert Celsius back to Fahrenheit?
Convert back with the inverse formula shown in the formula card above — or use our dedicated How Many Fahrenheit in 1 Celsius? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Temperature units are supported?
This converter supports 4 units: Celsius, Fahrenheit, Kelvin, Rankine.