The Celsius scale, also known as centigrade, is a temperature scale based on the freezing point of water at 0°C and the boiling point at 100°C under standard atmospheric conditions. It is widely used worldwide, particularly in science.
The Fahrenheit scale is a temperature scale that bases the freezing point of water at 32°F and the boiling point at 212°F under standard atmospheric pressure. It is primarily used in the United States.