Fahrenheit to Celsius Converter — Free °F to °C Tool
Our free Fahrenheit to Celsius converter instantly converts any °F value to °C. Use the Fahrenheit to Celsius formula: °C = (°F − 32) × 5/9. This Fahrenheit to Celsius tool uses the exact international definition. See Wikipedia on Celsius and the NIST unit conversion guide.
🌡️ Fahrenheit to Celsius Converter
How to Convert Fahrenheit to Celsius
Subtract 32, then multiply by 5/9 — the exact international formula.
Fahrenheit to Celsius Conversion Table
Common Fahrenheit values converted to Celsius at a glance.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0.5 °F | -17.5 °C |
| 1 °F | -17.222222 °C |
| 2 °F | -16.666667 °C |
| 3 °F | -16.111111 °C |
| 5 °F | -15 °C |
| 10 °F | -12.222222 °C |
| 15 °F | -9.444444 °C |
| 20 °F | -6.666667 °C |
| 25 °F | -3.888889 °C |
| 50 °F | 10 °C |
Real-Life Fahrenheit to Celsius Examples
Everyday situations where you need °F in °C.
🌡️ Reading US Weather Abroad
American weather apps and forecasts report temperatures in Fahrenheit. A US forecast of 72 °F = 22.2 °C. A winter warning at 14 °F = −10 °C. For international visitors or expats checking US weather, the Celsius equivalent gives an immediate sense of what to wear.
When visiting the United States or reading American news, temperatures quoted in Fahrenheit can feel meaningless without conversion. Converting to Celsius puts the number in a familiar context instantly.
🍕 US Recipe Oven Temperatures
American recipes specify oven temperatures in Fahrenheit. A standard bake at 350 °F = 176.7 °C. A high-heat roast at 425 °F = 218.3 °C. European, Australian, and most international ovens are calibrated in Celsius.
Following a US recipe on a metric oven requires converting the Fahrenheit setting to Celsius. Getting this wrong by even 20 degrees can significantly affect baking times and results.
🧪 Science & Lab Work
Scientific data from US sources often appears in Fahrenheit, while global scientific standards use Celsius. Water boils at 212 °F = 100 °C. Absolute zero is −459.67 °F = −273.15 °C. Accurate conversion is essential for reproducible results.
When comparing experimental data across US and international publications, temperature values must be in the same unit. Converting Fahrenheit to Celsius standardises the data and eliminates unit-mismatch errors.
🏥 Medical Records & Travel
US medical records and digital health apps often report body temperature in Fahrenheit. A normal reading of 98.6 °F = 37 °C. A significant fever at 103 °F = 39.4 °C. International doctors and pharmacies work in Celsius.
Travellers seeking medical care outside the US may need to relay their temperature in Celsius. Converting the Fahrenheit value on your thermometer ensures clear communication with healthcare professionals abroad.
Frequently Asked Questions
Frequently Asked Questions
1 Fahrenheit (°F) equals -17.222222 Celsiuss (°C).
Multiply the value in Fahrenheits by -17.222222. For example, 10 Fahrenheits = -12.222222 Celsiuss.
Yes. ConvertNow uses precise factors for all unit calculations. Currency conversions use live exchange rates updated regularly.
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