STAFF NURSE AYURVEDA -2023 The conversion formula between Celsius (°C) and Fahrenheit (°F) is °F = (°C × 9/5) + 32. To find the point where they are equal, we set °C = °F. Let T be the temperature. T = (T × 9/5) + 32 T - (T × 9/5) = 32 T × (1 - 9/5) = 32 T × (-4/5) = 32 T = 32 × (-5/4) T = -40