Fahrenheit to Celsius Calculator
Type a temperature in degrees Fahrenheit and click convert.
How to convert Fahrenheit to Celsius
The Fahrenheit-to-Celsius conversion is simple once you know the formula. Subtract 32 from the Fahrenheit temperature, then multiply by 5, and divide by 9.
°C = (°F − 32) × 5/9
Example conversion
If the temperature is 68°F:
- 68 − 32 = 36
- 36 × 5 = 180
- 180 ÷ 9 = 20
So, 68°F = 20°C.
Why this calculator is useful
Many weather reports, science resources, and recipes use different temperature scales. This tool helps you instantly switch from Fahrenheit to Celsius for everyday situations like:
- Checking weather while traveling internationally
- Understanding oven temperatures in global recipes
- Converting body temperature readings
- School and homework calculations
Quick reference temperatures
- 32°F = 0°C (freezing point of water)
- 68°F = 20°C (comfortable room temperature)
- 98.6°F = 37°C (average body temperature)
- 212°F = 100°C (boiling point of water at sea level)
Common mistakes to avoid
1) Forgetting to subtract 32 first
The subtraction happens before multiplying by 5/9. If you skip that step, your result will be incorrect.
2) Rounding too early
For more accurate results, keep decimals until the final step, then round.
3) Mixing up conversion direction
This page converts Fahrenheit to Celsius. The reverse formula is different: °F = (°C × 9/5) + 32.
Frequently asked questions
Can I convert negative Fahrenheit values?
Yes. The calculator supports negative numbers, including temperatures below freezing.
Does this calculator work with decimals?
Absolutely. You can input values like 72.5°F, and the tool returns a precise Celsius value.
Is Celsius used more widely than Fahrenheit?
Yes. Most countries use Celsius for weather, science, and daily life. Fahrenheit is mainly used in the United States and a few other places.