The conversion
140°F = 60°C
°C = (°F − 32) × 5/9, so (140 − 32) × 5/9 = 60.
As an outdoor air temperature, 140 °F sits in the hot band. The other scale is on the dial beside it in the app, so a reading like this needs no conversion at all.
Convert something else
68°F
The range either side
Neighbouring values, for when the number you actually wanted was a degree or two away.
| Fahrenheit | Celsius |
|---|---|
| 135 °F | 57.22 °C |
| 136 °F | 57.78 °C |
| 137 °F | 58.33 °C |
| 138 °F | 58.89 °C |
| 139 °F | 59.44 °C |
| 140 °F | 60 °C |
| 141 °F | 60.56 °C |
| 142 °F | 61.11 °C |
| 143 °F | 61.67 °C |
| 144 °F | 62.22 °C |
| 145 °F | 62.78 °C |
The other direction
60 °C converts back to 140 °F, which is the same relationship read the other way. Going from Celsius to Fahrenheit, multiply by 9/5 first and then add 32. Adding first is the usual mistake.
The full converter handles any value, in either direction, including kelvin, and shows the formula as it works.