Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius instantly. Use the exact formula or quick reference chart for body temperature, weather, cooking, and science conversions.
🌡️ Temperature📐 C = (F - 32) x 5/9
Temperature in Fahrenheit (F)
Please enter valid values.
Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| Fahrenheit to Celsius Converter | C = (F - 32) x 5/9 | degrees Celsius |
Step-by-Step Examples
Example 1
Body Temperature
98.6°F to Celsius.
- C = (98.6-32) x 5/9 = 66.6/1.8 = 37.0°C
- Normal human body temp = exactly 37°C
✓ 37.0°C (normal body temp)
Example 2
Oven Temperature
350°F to Celsius for baking.
- C = (350-32) x 5/9 = 318 x 5/9 = 176.7°C
- Gas mark 4 in UK ovens
✓ 176.7°C / Gas Mark 4
Example 3
Freezing Point
32°F to Celsius.
- C = (32-32) x 5/9 = 0°C
- Water freezes at 0°C / 32°F
✓ 0°C (water freezing point)
Real-World Applications
Cooking & Baking
Convert US recipe temperatures to Celsius for international ovens.
Weather
Understand international weather forecasts in Celsius.
Science & Lab
Convert experimental temperatures between US and SI units.
International Travel
Read local temperature displays when traveling abroad.
Common Mistakes to Avoid
⚠️
Using the wrong formula order
The subtraction comes first: (F - 32) then multiply by 5/9. A common error is multiplying first: 5/9 x F - 32, which gives the wrong answer.
⚠️
Confusing body temperature normals
98.6°F / 37°C is the accepted average. Actual healthy range is 97°F-99°F (36.1-37.2°C). A fever is generally above 100.4°F / 38°C.
⚠️
Forgetting Kelvin for science
Scientific work often requires Kelvin (K = C + 273.15). Absolute zero is 0 K = -273.15°C = -459.67°F.
Frequently Asked Questions
What is 100°F in Celsius? ▾
37.78°C. Formula: (100-32) x 5/9 = 37.78°C. This is slightly above normal body temperature, indicating a mild fever.
What is a quick way to convert Fahrenheit to Celsius? ▾
Quick estimate: subtract 30, then divide by 2. For 70°F: (70-30)/2 = 20°C (exact: 21.1°C). This rough method is accurate to within 2-3 degrees for everyday temperatures.
What temperature is the same in both Fahrenheit and Celsius? ▾
-40 degrees. At -40, Fahrenheit and Celsius scales intersect: -40°F = -40°C. This is the only temperature where both scales give identical readings.
What is 37°C in Fahrenheit? ▾
98.6°F. This is normal human body temperature and one of the most important reference points for the F-to-C conversion.
How do I convert Celsius to Fahrenheit? ▾
Reverse formula: F = (C x 9/5) + 32. For 20°C: (20 x 1.8) + 32 = 68°F.