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# How are Celsius temperatures converted into Fahrenheit temperatures?

Temperature is the level of heat in a gas, liquid, or solid. The freezing and boiling points of water are used as standard reference levels in both the metric (Celsius or, less common, Centigrade) and the English system (Fahrenheit). In the metric system, the difference between freezing and boiling is divided into one hundred equal intervals each called a degree Celsius (°C); in the English system, the intervals are divided into 180 units, with one unit called a degree Fahrenheit (°F).

The formula for converting Celsius temperatures into Fahrenheit is °F = (°C × 9/5) 32. The formula for converting Fahrenheit temperatures into Celsius is °C = (°F - 32) × 5/9. Some comparisons between the two scales are as follows:

 Temperature Fahrenheit Centigrade Absolute zero –459.67 –273.15 Point of equality –40 –40 0°F 0 –17.8 Freezing point of water 32 0 Normal human blood temperature 98.4 36.9 100°F 100 37.8 Boiling point of water (at standard pressure) 212 100

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