Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius with C = (F – 32) x 5/9. Enter a temperature in degrees Fahrenheit to get Celsius and Kelvin. Example: 98.6 °F = 37 °C.
Type the problems from this lesson and check each step.
Show steps
How to use the Fahrenheit to Celsius Converter
- Type the value in fahrenheit.
- Choose how many decimal places you want.
- Press Calculate to see the value in celsius, with the formula and steps.
Formula and method
°C = (°F − 32) × 5/9
Subtract 32 first, then multiply by 5/9 (about 0.5556). For a mental estimate, subtract 30 and halve: 80°F gives 25°C, against the exact 26.7°C. Normal body temperature of 98.6°F is exactly 37°C.
°F to °C conversion chart
| Fahrenheit | Celsius |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.8 °C |
| 10 °F | -12.2 °C |
| 20 °F | -6.7 °C |
| 32 °F | 0 °C |
| 40 °F | 4.4 °C |
| 50 °F | 10 °C |
| 60 °F | 15.6 °C |
| 68 °F | 20 °C |
| 70 °F | 21.1 °C |
| 75 °F | 23.9 °C |
| 80 °F | 26.7 °C |
| 90 °F | 32.2 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.8 °C |
| 212 °F | 100 °C |
| 350 °F | 176.7 °C |
| 400 °F | 204.4 °C |
| 450 °F | 232.2 °C |
Weather and body temperature
US weather reports are in Fahrenheit, so 90°F is 32.2°C, 70°F is 21.1°C and 0°F is −17.8°C. A fever is generally considered 100.4°F (38°C) or higher in adults. For your own forecasts abroad, 59°F (15°C) is mild and 95°F (35°C) is hot.
Oven temperatures
| Fahrenheit | Celsius | Typical use |
|---|---|---|
| 325°F | 162.8°C | Slow roast, cheesecake |
| 350°F | 176.7°C | Cakes, cookies, casseroles |
| 375°F | 190.6°C | Muffins, chicken pieces |
| 400°F | 204.4°C | Roasting vegetables |
| 425°F | 218.3°C | Pizza, crisp potatoes |
| 450°F | 232.2°C | Bread, high-heat roasting |
Many European ovens round these to 160, 180, 190, 200, 220 and 230°C.
What are degrees Fahrenheit and degrees Celsius?
The Fahrenheit scale, published by Daniel Gabriel Fahrenheit in 1724, puts water’s freezing point at 32 degrees and its boiling point at 212 degrees. It is the everyday scale in the United States.
The Celsius scale sets the freezing point of water at 0 degrees and its boiling point at 100 degrees at standard atmospheric pressure. One Celsius degree is the same size as one kelvin.
How to convert fahrenheit to celsius step by step
- Write the value you want to convert: 77 °F.
- Apply the rule fahrenheit to celsius: (°F − 32) × 5/9.
- Calculate: (77 − 32) × 5/9 = 25 °C.
- Check a second value, 14 °F: (14 − 32) × 5/9 = -10 °C.
Round the answer to the precision you need. For quick checks use the mental estimate in the formula section above, and use the converter for exact results.
Full °F to °C chart
| °F | °C | °F | °C | °F | °C |
|---|---|---|---|---|---|
| 0 °F | -17.8 °C | 50 °F | 10 °C | 100 °F | 37.8 °C |
| 5 °F | -15 °C | 55 °F | 12.8 °C | 105 °F | 40.6 °C |
| 10 °F | -12.2 °C | 60 °F | 15.6 °C | 110 °F | 43.3 °C |
| 15 °F | -9.4 °C | 65 °F | 18.3 °C | 115 °F | 46.1 °C |
| 20 °F | -6.7 °C | 70 °F | 21.1 °C | 120 °F | 48.9 °C |
| 25 °F | -3.9 °C | 75 °F | 23.9 °C | 125 °F | 51.7 °C |
| 30 °F | -1.1 °C | 80 °F | 26.7 °C | 130 °F | 54.4 °C |
| 35 °F | 1.7 °C | 85 °F | 29.4 °C | 135 °F | 57.2 °C |
| 40 °F | 4.4 °C | 90 °F | 32.2 °C | 140 °F | 60 °C |
| 45 °F | 7.2 °C | 95 °F | 35 °C | 145 °F | 62.8 °C |
Frequently asked questions
How do I convert 100 Fahrenheit to Celsius?
(100 – 32) x 5/9 = 37.78°C.
What is 72 degrees Fahrenheit in Celsius?
72°F is 22.2°C, a common room temperature.
What is the easy way to estimate?
Subtract 30 and divide by 2. It is within about 2 degrees for everyday temperatures.
Sources
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