Temperature Converter

To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and add 32. The formula is: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. Our temperature converter does this calculation instantly for you.

To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and multiply by 5/9. The formula is: °C = (°F - 32) × 5/9. For example, 68°F = (68 - 32) × 5/9 = 20°C. Use our converter for quick and accurate conversions.

The freezing point of water is 0°C (Celsius), 32°F (Fahrenheit), 273.15 K (Kelvin), and 491.67°R (Rankine). Our temperature converter includes this as a preset for quick reference and conversion.

The boiling point of water at sea level is 100°C (Celsius), 212°F (Fahrenheit), 373.15 K (Kelvin), and 671.67°R (Rankine). This is available as a preset in our converter for easy access.

Kelvin is an absolute temperature scale used in scientific applications. It starts at absolute zero (the coldest possible temperature) and uses the same degree size as Celsius. To convert Celsius to Kelvin, add 273.15. Unlike Celsius and Fahrenheit, Kelvin values are not expressed with the degree symbol (°).

Rankine is an absolute temperature scale similar to Kelvin but based on Fahrenheit degrees. It's primarily used in engineering applications. To convert Fahrenheit to Rankine, add 459.67. Absolute zero is 0°R, which equals -459.67°F.

Normal human body temperature is approximately 37°C (98.6°F), 310.15 K, or 558.27°R. Our temperature converter includes this as a preset for quick reference and conversion to any temperature scale.

Absolute zero, the coldest possible temperature, is -273.15°C, -459.67°F, 0 K, and 0°R. This is the point where all molecular motion theoretically stops. Our converter includes this as a preset for scientific calculations.