Temperature Converter
Temperature Converter
Different fields and regions use different temperature scales — Celsius for most of the world and science, Fahrenheit in the US, Kelvin for absolute/scientific measurements, and Rankine occasionally in engineering.
This tool converts between all four directly, so you don't need to remember separate formulas for each pair.
- Key reference points: water freezes at 0°C / 32°F / 273.15 K, and boils at 100°C / 212°F / 373.15 K (at sea level).
- Kelvin and Rankine are absolute scales: 0 K and 0°R represent absolute zero, with no negative values possible.
- Fully flexible: change either dropdown to convert between any two of the four supported temperature scales.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32, or select "Celsius" as From and "Fahrenheit" as To in this converter.
Why is Kelvin used in science?
Kelvin has no negative values and starts at absolute zero, making it convenient for physics and chemistry formulas where temperature must be strictly positive.
Temperature Converter
Different fields and regions use different temperature scales — Celsius for most of the world and science, Fahrenheit in the US, Kelvin for absolute/scientific measurements, and Rankine occasionally in engineering.
This tool converts between all four directly, so you don't need to remember separate formulas for each pair.
- Key reference points: water freezes at 0°C / 32°F / 273.15 K, and boils at 100°C / 212°F / 373.15 K (at sea level).
- Kelvin and Rankine are absolute scales: 0 K and 0°R represent absolute zero, with no negative values possible.
- Fully flexible: change either dropdown to convert between any two of the four supported temperature scales.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 and add 32, or select "Celsius" as From and "Fahrenheit" as To in this converter.
Why is Kelvin used in science?
Kelvin has no negative values and starts at absolute zero, making it convenient for physics and chemistry formulas where temperature must be strictly positive.