Fahrenheit to celsius (centigrade)

This free conversion calculator will convert Fahrenheit to Celsius, i.e. °F to °C. Correct conversion between different measurement scales.

The formula is $$$T_{\text{°C}} = 0.555555555555556 T_{\text{°F}} - 17.777777777777778$$$, where $$$T_{\text{°F}} = 15$$$.

Therefore, $$$T_{\text{°C}} = -9.444444444444444$$$.

Answer: $$$15 \text{°F} = -9.444444444444444 \text{°C}$$$.