Temperature Converter

To convert Celsius to Fahrenheit, multiply by 1.8 and add 32. For example, 100°C = (100 × 1.8) + 32 = 212°F. This formula is needed whenever you switch between metric and US temperature scales.

Kelvin is the SI base unit of temperature, used in science and physics. It starts at absolute zero (the coldest possible temperature). To convert Celsius to Kelvin, add 273.15. For example, 0°C = 273.15 K and 100°C = 373.15 K.

Water freezes at 32°F (0°C) and boils at 212°F (100°C) at standard atmospheric pressure. These two reference points are the easiest way to cross-check Celsius to Fahrenheit conversions.

Celsius and Fahrenheit are equal at -40 degrees. At -40°, both scales read the same value. This is a useful reference point for extremely cold temperatures and makes a good sanity check when converting between the two scales.

A comfortable room temperature is typically 20-22°C (68-72°F). Normal body temperature is 37°C (98.6°F), water freezes at 0°C (32°F) and boils at 100°C (212°F). These reference points are helpful for quickly sanity-checking any temperature conversion.