According to Celsius to Fahrenheit Conversion formula if you want to convert 37 . 4 (thirty-seven point four) degrees Celsius (°C) to degrees Fahrenheit (°F) you have to multiply 37.4 by 9/5 (you can first multiply 37.4 by 9 and then divide the result by 5). Many international recipes use Celsius, while some use Fahrenheit . Understanding that 37 . 4°C is 99.3°F is crucial for precise temperature control in cooking, especially when following recipes from different countries. How to convert 37 . 4 celsius to fahrenheit . What is the formula to convert 37.4 from °C to °F? Online Temperature Conversion tool that lets you easily convert from Celsius to Fahrenheit and Kelvin and vice versa.