Fahrenheit to Celsius Converter
Updated Formulas shown
Subtract 32, then multiply by 5/9: (70 °F − 32) × 5/9 = 21.1 °C. Order matters — subtract first.
Formula: °C = (°F − 32) × 5/9 (exact)
Common values: degrees Fahrenheit → degrees Celsius
| degrees Fahrenheit | degrees Celsius |
|---|---|
| -40 °C | |
| -17.7778 °C | |
| 0 °C | |
| 10 °C | |
| 18.3333 °C | |
| 21.1111 °C | |
| 22.2222 °C | |
| 26.6667 °C | |
| 37 °C | |
| 100 °C | |
| 176.667 °C | |
| 204.444 °C |
70 °F in every temperature unit
- 21.1111 °C
- 294.261 K
- 529.67 °R
How to convert degrees Fahrenheit to degrees Celsius
- Type the value in degrees Fahrenheit into the converter (or into the right-hand box to go the other way).
- Subtract 32 from the Fahrenheit value.
- Multiply the result by 5/9 to get degrees Celsius.
- Round to a sensible precision with the Decimals control; the table below covers the values people look up most.
Degree Fahrenheit to degree Celsius formula
°C = (°F − 32) × 5/9. The factor is exact by definition (NIST SP 811), so any rounding comes only from how many decimals you keep.
°F to °C conversion table
| °F | °C |
|---|---|
| -20 | -28.9 |
| -15 | -26.1 |
| -10 | -23.3 |
| -5 | -20.6 |
| 0 | -17.8 |
| 5 | -15 |
| 10 | -12.2 |
| 15 | -9.4 |
| 20 | -6.7 |
| 25 | -3.9 |
| 30 | -1.1 |
| 35 | 1.7 |
| 40 | 4.4 |
| 45 | 7.2 |
| 50 | 10 |
| 55 | 12.8 |
| 60 | 15.6 |
| 65 | 18.3 |
| 70 | 21.1 |
| 75 | 23.9 |
| 80 | 26.7 |
| 85 | 29.4 |
| 90 | 32.2 |
| 95 | 35 |
| 100 | 37.8 |
| 105 | 40.6 |
| 110 | 43.3 |
| 115 | 46.1 |
| 120 | 48.9 |
Oven temperatures
| °F | °C (exact) | °C (recipe) | gas mark |
|---|---|---|---|
| 275 | 135 | 140 | 1 |
| 300 | 148.9 | 150 | 2 |
| 325 | 162.8 | 170 | 3 |
| 350 | 176.7 | 180 | 4 |
| 375 | 190.6 | 190 | 5 |
| 400 | 204.4 | 200 | 6 |
| 425 | 218.3 | 220 | 7 |
| 450 | 232.2 | 230 | 8 |
| 475 | 246.1 | 240 | 9 |
Thermostat and water heater settings
The US Department of Energy suggests 68 °F (20 °C) for winter heating while you're home and 120 °F (48.9 °C) on a water heater — hot enough for most uses and below the scald risk of the common 140 °F (60 °C) factory setting. Water pipes in unheated spaces are at risk when the outdoor temperature drops to about 20 °F (−6.7 °C).
Related converters & calculators
Frequently asked questions
What is 70 °F in Celsius?
21.1 °C.
What is 350 °F in Celsius?
176.7 °C. Recipes round it to 180 °C (gas mark 4).
What is a quick °F to °C estimate?
Subtract 30 and halve: 70 °F → 20 °C. The exact answer is 21.1 °C.
What is 32 °F in Celsius?
0 °C, the freezing point of water.
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