How to Convert Degree Fahrenheit to Degree Centigrade. 1 °F = 0.5555555556 °C 1 °C = 1.8 °F. Example: convert 15 °F to °C: 15 °F = 15 × 0.5555555556 °C = 8.3333333333 °C. Convert Degree Fahrenheit to Other Temperature Interval Units 1 °F = 0.5555555556 °C Example: convert 15 °C to °F: 15 °C = 15 × 1.8 °F = 27 °F Convert Degree Centigrade to Other Temperature Interval Units Degree Centigrade to Kelvin Degree Centigrade to Degree Celsius Degree Centigrade to Degree Rankine Degree Centigrade to Degree Reaumur xw09f1o.