Convert between Celsius, Fahrenheit, and Kelvin instantly. Instant results with conversion formulas.
To convert Celsius to Fahrenheit, multiply by 9/5 and then add 32. Formula: °F = (°C × 9/5) + 32. For example, 100°C = (100 × 9/5) + 32 = 180 + 32 = 212°F.
To convert Fahrenheit to Celsius, subtract 32 and then multiply by 5/9. Formula: °C = (°F − 32) × 5/9. For example, 98.6°F = (98.6 − 32) × 5/9 = 66.6 × 5/9 = 37°C.
Absolute zero is 0 Kelvin, which equals −273.15°C or −459.67°F. It is the lowest possible temperature, at which all thermal motion stops.
The temperature −40 is the same in both Celsius and Fahrenheit: −40°C = −40°F. This is the point where the two scales intersect.
To convert Celsius to Kelvin, add 273.15. Formula: K = °C + 273.15. For example, 0°C = 273.15 K (the freezing point of water) and 100°C = 373.15 K (the boiling point of water).