Fahrenheit to Celsius Converter
Convert temperatures from Fahrenheit (°F) to Celsius (°C) instantly. Fast, accurate, and mobile-friendly.
Water freezes at 0°C
Water freezes at 32°F
Water freezes at 273.15 K (absolute zero = 0 K)
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Conversion Formulas
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Common Temperature Reference Points
Water Freezes
0°C / 32°F / 273.15 K
Room Temperature
20°C / 68°F / 293.15 K
Body Temperature
37°C / 98.6°F / 310.15 K
Water Boils
100°C / 212°F / 373.15 K
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⚠️ Important Disclaimer
This tool provides estimates for informational purposes only. Results should not be relied upon for important decisions. Always consult with a qualified professional for advice specific to your situation.
Fahrenheit to Celsius Formula
°C = (°F - 32) × 5/9
How to convert Fahrenheit to Celsius:
- Subtract 32 from the Fahrenheit temperature
- Multiply the result by 5/9 (or divide by 1.8)
- The result is the temperature in Celsius
Example:
Convert 68°F to Celsius:
°C = (68 - 32) × 5/9 = 36 × 5/9 = 36 ÷ 1.8 = 20°C
Fahrenheit to Celsius Conversion Table
| Fahrenheit (°F) | Celsius (°C) | Description |
|---|---|---|
| -40°F | -40°C | Extremely cold (same value) |
| 0°F | -17.8°C | Very cold winter day |
| 32°F | 0°C | Water freezes |
| 50°F | 10°C | Cool day |
| 68°F | 20°C | Room temperature |
| 86°F | 30°C | Hot summer day |
| 98.6°F | 37°C | Normal body temperature |
| 104°F | 40°C | Very hot day |
| 122°F | 50°C | Extremely hot |
| 212°F | 100°C | Water boils |
Visual Temperature Scale Comparison
Side-by-side comparison showing key reference points on both scales
Celsius (°C)
Fahrenheit (°F)
Understanding Fahrenheit and Celsius
Fahrenheit Scale
The Fahrenheit scale is primarily used in the United States, its territories, and a few other countries. It provides a more granular scale for everyday temperature ranges.
Developed by Daniel Gabriel Fahrenheit in 1724, the scale was originally based on three fixed points, but is now defined by the freezing and boiling points of water.
Key reference points:
- Absolute zero: -459.67°F
- Water freezes: 32°F
- Room temperature: ~68-72°F
- Body temperature: 98.6°F
- Water boils: 212°F
Celsius Scale
The Celsius scale (also called centigrade) is the most widely used temperature scale worldwide. It's the standard in most countries and in scientific applications.
The scale is based on the freezing point (0°C) and boiling point (100°C) of water at standard atmospheric pressure, making it intuitive for everyday use.
Key reference points:
- Absolute zero: -273.15°C
- Water freezes: 0°C
- Room temperature: ~20-22°C
- Body temperature: 37°C
- Water boils: 100°C
Frequently Asked Questions
How do I convert Fahrenheit to Celsius?
Use the formula: °C = (°F - 32) × 5/9. Subtract 32 from the Fahrenheit temperature, then multiply by 5/9 (or divide by 1.8). For example, (77°F - 32) × 5/9 = 25°C.
What is the difference between Fahrenheit and Celsius?
Fahrenheit is an imperial temperature scale where water freezes at 32° and boils at 212°. Celsius is a metric scale where water freezes at 0° and boils at 100°. Fahrenheit is primarily used in the US, while Celsius is the global standard.
Why is Celsius more popular worldwide than Fahrenheit?
Celsius is part of the metric system, which is the international standard for measurement. Its scale based on water's freezing (0°) and boiling (100°) points makes it more intuitive and easier to use in scientific calculations and daily life.
What temperature is the same in Fahrenheit and Celsius?
-40 degrees is the only temperature where Fahrenheit and Celsius scales intersect. At this temperature, -40°F = -40°C.
Is 32°F the same as 0°C?
Yes! 32°F (the freezing point of water) equals exactly 0°C. This is one of the key reference points for converting between the two scales.
What is a quick way to estimate Fahrenheit to Celsius conversion?
A quick mental approximation: subtract 30 from the Fahrenheit temperature and divide by 2. For example, 70°F: (70 - 30) ÷ 2 = 20°C (actual: 21.1°C). This method is accurate within a few degrees for most everyday temperatures.