How to convert celsius to fahrenheit

Step-by-step explanation of how to convert celsius to fahrenheit, with formulas, worked examples, and a free online calculator.

Converting Celsius to Fahrenheit is the most common temperature conversion in the world. The formulas are: F = (C × 9/5) + 32, and the inverse C = (F − 32) × 5/9. Useful reference points: 0°C = 32°F (freezing point of water), 25°C = 77°F (room temperature), 37°C = 98.6°F (body temperature), 100°C = 212°F (boiling point of water). The two scales meet at −40° (i.e. −40°C = −40°F). For quick estimates: double the Celsius and add 30 to get an approximate Fahrenheit value.