Fahrenheit to Celsius Converter (°F to °C) + Formula & Table
Fahrenheit to Celsius Converter (°F to °C)
This page explains how to convert temperatures from Fahrenheit (°F) to Celsius (°C) using the official conversion formula. It’s commonly used for weather comparisons, travel, cooking, science, and general reference.
✅ Fahrenheit to Celsius Formula
°C = (°F − 32) × 5/9
This is the exact formula used to convert Fahrenheit temperatures into Celsius.
Instant Converter
Quick Conversion Table
| Fahrenheit (°F) | Celsius (°C) | Reference |
|---|---|---|
| -40 | -40 | Same on both scales |
| 0 | -17.8 | Very cold conditions |
| 32 | 0 | Water freezes |
| 50 | 10 | Cool day |
| 68 | 20 | Room temperature |
| 77 | 25 | Warm day |
| 86 | 30 | Hot day |
| 98.6 | 37 | Normal body temperature |
| 212 | 100 | Water boils (sea level) |
Worked Examples
- 68°F to °C: (68 − 32) × 5/9 = 20°C
- 32°F to °C: (32 − 32) × 5/9 = 0°C
- 86°F to °C: (86 − 32) × 5/9 = 30°C
Frequently Asked Questions
Why does Fahrenheit start at 32 for freezing?
The Fahrenheit scale was designed using different reference points than Celsius. Water freezes at 32°F and boils at 212°F, which spreads common temperatures across a wider numeric range.
Is there a quick mental shortcut?
A rough estimate is to subtract 30 from °F and then divide by 2. This is useful for quick weather estimates but is not exact.
Does altitude affect these conversions?
The conversion formula stays the same, but reference points like boiling water can change with altitude due to air pressure differences.
Disclaimer: This page provides general reference information only. While the conversion formula shown is accurate, results may vary due to rounding or context. Do not rely on this information for medical, engineering, safety-critical, or regulated use. Always verify measurements using appropriate tools and official sources.