Fahrenheit to Celsius
Convert fahrenheit (°F) to celsius (°C). Live results, batch values, CSV export, formula and examples. Free, no sign-up.
Runs on your device · no data upload
Up to 500 values. Calculations stay on this device. Decimal point: dot. Results use floating-point arithmetic and the selected display precision.
Results
1 values converted
| row | input | from | result | to | error |
|---|---|---|---|---|---|
| 1 | 1 | °F | -17.2222222222 | °C | — |
These convert absolute temperatures, not temperature differences. Values below absolute zero are rejected.
Raw response
[
{
"row": 1,
"input": 1,
"from": "°F",
"result": "-17.2222222222",
"to": "°C"
}
]How to convert fahrenheit to celsius
Enter one value or paste one value per line. Change precision, swap units, then copy or export the results. Invalid values are reported individually.
result = (value × 0.555555555556 + 255.372222222 − 273.15) ÷ 1
These convert absolute temperatures, not temperature differences. Values below absolute zero are rejected.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0 | -17.7777777778 |
| 1 | -17.2222222222 |
| 10 | -12.2222222222 |
| 100 | 37.7777777778 |
Reference: NIST unit conversion factors. Decimal and binary storage prefixes are distinct; rounded display values do not change the underlying calculation.