The interval between the freezing and boiling points of water is 100 degrees on the Celsius scale and 180 degrees (212 - 32) on the Fahrenheit scale. Thus, 100°C corresponds to 180°F. This means a 1°C change is equivalent to a 1.8°F (180/100 = 9/5) change. Starting from the freezing point (0°C = 32°F), the formula to convert Celsius (TC) to Fahrenheit (TF) is TF = (9/5)TC + 32.