The Fahrenheit scale places water's freezing point at 32 °F and its boiling point at 212 °F. Proposed by Daniel Gabriel Fahrenheit in 1724, it is still the official temperature unit in the US, Belize and a few Caribbean countries. Normal human body temperature is 98.6 °F.
Real-world: US room temperature 68–72 °F. Body temperature 98.6 °F. Fever 100.4 °F. Pizza oven 450 °F.
Read full fahrenheit reference →The Celsius scale defines 0 °C as the freezing point of water and 100 °C as the boiling point at standard atmospheric pressure. Proposed by Anders Celsius in 1742, it is the everyday temperature unit in all countries except the US, Belize, the Bahamas, the Cayman Islands and Liberia.
Real-world: Room temperature is about 20 °C. Normal body temperature is 37 °C. Typical fridge setting is 4 °C. European winter can reach −20 °C; desert summer 45+ °C.
Read full celsius reference →