Convert 38.8 degrees Celsius to Fahrenheit using a simple formula and a calculator. See the step-by-step solution and the values around 38.8 Celsius. According to Celsius to Fahrenheit Conversion formula if you want to convert 38.8 (thirty-eight point eight) degrees Celsius (°C) to degrees Fahrenheit (°F) you have to multiply 38.8 by 9/5 (you can first multiply 38.8 by 9 and then divide the result by 5). Celsius to Fahrenheit (°C to °F) conversion calculator and how to convert. Explanation: To convert a temperature from Celsius to Fahrenheit, the formula used is F = where F represents the Fahrenheit temperature and C the Celsius temperature. Given that a person has a fever of 38.8 °C, applying this formula yields a Fahrenheit temperature. By plugging in the values, we have F = which simplifies to F = 101.84 °F.