Fahrenheit to Celsius Converter
Instantly convert °F to °C for free. Ideal for cooking, travel, and science. Get accurate results in seconds!
Fahrenheit to Celsius Formula
Equation to Convert Fahrenheit to Celsius
°C = (°F - 32) × 5/9
Example: 68°F = (68 - 32) × 5/9 = 20°C
How to Convert Fahrenheit to Celsius
Click each step to see detailed calculation
1
Subtract 32
Subtract 32 from the Fahrenheit temperature
68 - 32 = 36
2
Multiply by 5/9
Multiply the result from step 1 by 5/9 (or approximately 0.556)
36 × 5 = 180
3
Final Result
Get the final Celsius temperature result
180 ÷ 9 = 20
Fahrenheit to Celsius Conversion Common Mistakes
- Forgetting to subtract 32 - Only multiplying by 5/9 will give incorrect results
- Incorrect order of operations - Multiplying by 5/9 first and then subtracting 32 is incorrect
- Using the wrong fraction - Using 2/3 instead of 5/9 is a common error
- Rounding too early - Rounding intermediate results can lead to inaccuracies
Fahrenheit to Celsius Conversion Table
| °F | °C | Description |
|---|---|---|
| -459.67°F | -273.15°C | Absolute zero |
| -40°F | -40°C | Fahrenheit and Celsius scales intersect |
| 0°F | -17.78°C | Extremely cold day |
| 32°F | 0°C | Water freezing point |
| 50°F | 10°C | Cool autumn day |
| 68°F | 20°C | Room temperature |
| 77°F | 25°C | Warm summer day |
| 86°F | 30°C | Hot summer day |
| 98.6°F | 37°C | Average human body temperature |
| 100°F | 37.78°C | High fever |
| 212°F | 100°C | Water boiling point (at sea level) |
| 350°F | 176.67°C | Baking temperature |
| 450°F | 232.22°C | Broiling temperature |
Practical Temperature Conversion Uses
Cooking and Baking
Essential temperature conversions for kitchen use:
- 140°F (60°C) - Pasteurization temperature for eggs
- 160°F (71°C) - Medium doneness for meats
- 165°F (74°C) - Safe poultry internal temperature
- 175°F (79°C) - Well-done meats
- 200°F (93°C) - Simmering temperature for sauces
- 212°F (100°C) - Water boiling point (sea level)
- 225°F (107°C) - Low-temperature smoking
- 250°F (121°C) - Very slow oven
- 300°F (149°C) - Slow roasting
- 325°F (163°C) - Moderate oven (most baked goods)
- 350°F (177°C) - Standard baking temperature
- 375°F (191°C) - Hot oven (cookies, pies)
- 400°F (204°C) - Very hot oven (roasting vegetables)
- 425°F (218°C) - Pizza cooking temperature
- 450°F (232°C) - Broiling/searing temperature
- 500°F (260°C) - Maximum home oven temperature
Weather Interpretation
Understanding temperature in daily life:
- -40°F (-40°C) - Extremely dangerous cold (frostbite in minutes)
- 0°F (-18°C) - Dangerously cold (limit outdoor exposure)
- 14°F (-10°C) - Very cold winter day
- 32°F (0°C) - Freezing point (ice forms)
- 50°F (10°C) - Cool jacket weather
- 59°F (15°C) - Mild spring/autumn day
- 68°F (20°C) - Comfortable room temperature
- 77°F (25°C) - Warm summer day
- 86°F (30°C) - Hot summer day
- 95°F (35°C) - Very hot (heat advisory likely)
- 104°F (40°C) - Dangerously hot (heat stroke risk)
Body Temperature
Important health-related temperatures:
- 95°F (35°C) - Hypothermia begins
- 96.8°F (36°C) - Slightly low body temperature
- 97.7°F (36.5°C) - Normal low body temperature
- 98.6°F (37°C) - Standard human body temperature
- 99.5°F (37.5°C) - Slightly elevated temperature
- 100.4°F (38°C) - Fever threshold
- 102°F (38.9°C) - Moderate fever
- 104°F (40°C) - High fever (seek medical attention)
- 106°F (41.1°C) - Dangerous fever (emergency)
Science and Industry
Key scientific temperature references:
- -459.67°F (-273.15°C) - Absolute zero
- -320°F (-196°C) - Liquid nitrogen temperature
- -109°F (-78.5°C) - Dry ice sublimation point
- 32°F (0°C) - Water freezing point
- 212°F (100°C) - Water boiling point (at sea level)
- 451°F (233°C) - Paper ignition temperature
- 600°F (316°C) - Lead melting point
- 1,832°F (1,000°C) - Lava temperature range
- 2,795°F (1,535°C) - Iron melting point
Frequently Asked Questions (FAQ)
How to convert Fahrenheit to Celsius?
To convert Fahrenheit to Celsius, subtract 32, then multiply by 5/9. Formula: °C = (°F - 32) × 5/9
What is the difference between Fahrenheit and Celsius?
Fahrenheit and Celsius are two different temperature measurement units. Fahrenheit is primarily used in the United States, while Celsius is widely used internationally. They use different scales: in Fahrenheit, water freezes at 32°F and boils at 212°F; in Celsius, water freezes at 0°C and boils at 100°C.
How can I quickly estimate the conversion between Fahrenheit and Celsius?
A simple estimation method is to subtract 30 from the Fahrenheit temperature, then divide by 2 (instead of the accurate subtraction of 32 and multiplying by 5/9). For example, 70°F is approximately (70 - 30) / 2 = 20°C (actually 21.11°C). This method provides a close enough estimate for everyday use.
At what temperature are Fahrenheit and Celsius equal?
Fahrenheit and Celsius are equal at -40 degrees. That is, -40°F = -40°C. This is the intersection point of the two temperature scales.