Type a number of degrees Fahrenheit and this converter shows the answer in degrees Celsius instantly (350 °F = 176.667 °C). Below the converter you will find a ready-made °F to °C table, and further down the formula with a worked example.
American recipes, weather forecasts and medical thermometers use Fahrenheit. Converting to Celsius tells you that a recipe’s 350 °F oven is about 177 °C (usually set to 180 °C, or 160 °C fan), that 98.6 °F is a normal 37 °C body temperature, and whether a 90 °F forecast for your US holiday means a hot 32 °C day.
How to use the Fahrenheit to Celsius tool
- Enter the value in degrees Fahrenheit in the Value box. Decimals such as 175.5 are fine.
- The result in degrees Celsius appears straight away, rounded to six significant digits.
- Check the formula line under the result to see exactly how it was calculated.
- Press ⇄ to convert degrees Celsius back to degrees Fahrenheit, or pick any other unit from the lists.
- Use Copy result, or look up common values in the conversion table.
Why use ToolOrca Fahrenheit to Celsius
- Correct offset formula, not a rough factor
- Conversion table: °F to °C
- Formula and worked example included
- Instant result as you type
- Converts to every other temperature unit too
- Free, private and works offline
How to convert degrees Fahrenheit to degrees Celsius
Temperature scales have different zero points, so there is no single factor: On the Fahrenheit scale water freezes at 32 °F and boils at 212 °F, so 180 Fahrenheit degrees span the same range as 100 Celsius degrees. On the Celsius scale water freezes at 0 °C and boils at 100 °C at sea level; 0 °C is exactly 273.15 K.
To convert degrees Fahrenheit to degrees Celsius, subtract 32 from the Fahrenheit temperature and then multiply by 5/9 (or divide by 1.8).
Worked example: 350 °F − 32 = 318, then 318 × 5/9 = 176.667 °C.
Quick mental math for °F to °C
Subtract 30 and halve it: 80 °F → 50 ÷ 2 = 25 °C (exact 26.7 °C). It works well for everyday weather; use the exact formula for ovens and fevers.
Need the opposite direction? Use the degrees Celsius to degrees Fahrenheit converter, or switch units with the ⇄ button above.
Frequently asked questions
How many degrees Celsius is 98.6 °F?
98.6 °F is 37 °C (98.6 °F − 32 = 66.6, then 66.6 × 5/9 = 37 °C).
How many degrees Celsius is 350 °F?
350 °F is 176.667 °C (350 °F − 32 = 318, then 318 × 5/9 = 176.667 °C).
How many degrees Celsius is 70 °F?
70 °F is 21.1111 °C (70 °F − 32 = 38, then 38 × 5/9 = 21.1111 °C).
What is the formula to convert degrees Fahrenheit to degrees Celsius?
To convert degrees Fahrenheit to degrees Celsius, subtract 32 from the Fahrenheit temperature and then multiply by 5/9 (or divide by 1.8). To go the other way, use the degrees Celsius to degrees Fahrenheit converter.