Fahrenheit to Celsius Converter
Convert Fahrenheit temperatures to Celsius with the standard formula (°F - 32) × 5/9.
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How to Use the Fahrenheit to Celsius Converter – °F to °C
- 1Type the temperature in degrees Fahrenheit (°F).
- 2View the calculated temperature in Celsius (°C) immediately.
- 3Review the mathematical step: subtract 32 first, then multiply by 5/9.
- 4Use the 'Swap' link if you need to calculate Celsius back to Fahrenheit.
Formula & How It Works
Fahrenheit to Celsius Conversion Formula
To convert Fahrenheit to Celsius, subtract the 32-degree offset first, then multiply by 5/9 (or divide by 1.8).
Worked Examples
Standard Oven Baking Temperature
Input: 350 °F
Explanation: (350 - 32) × 5/9 = 318 × 5/9 = 176.67 °C.
Summer Heat Wave
Input: 100 °F
Explanation: (100 - 32) × 5/9 = 68 × 5/9 = 37.78 °C.
Freezing Weather
Input: 32 °F
Explanation: (32 - 32) × 5/9 = 0.00 °C.
Mild Spring Day
Input: 68 °F
Explanation: (68 - 32) × 5/9 = 36 × 5/9 = 20.00 °C.
Frequently Asked Questions
What is the formula to convert °F to °C?▼
Subtract 32 from the Fahrenheit temperature and divide the result by 1.8: °C = (°F - 32) ÷ 1.8.
What is a 100 °F fever in Celsius?▼
A body temperature of 100 °F equals 37.78 °C (a mild low-grade fever).
What is a quick mental math trick for Fahrenheit to Celsius?▼
Subtract 30 and divide by 2. For 70 °F: 70 - 30 = 40; 40 / 2 = 20 °C (actual is 21.1 °C, close enough for weather).
What is water's boiling point in Celsius?▼
Water boils at 100 °C at standard atmospheric pressure (which equals 212 °F).
Can temperatures go below -459.67 °F?▼
No, -459.67 °F is absolute zero (-273.15 °C), where molecular thermal motion ceases.
Is this tool free with zero tracking?▼
Yes, all temperature math runs entirely in your local browser without transmitting data.
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