How to use the temperature converter
This temperature converter lets you switch between Celsius, Fahrenheit, Kelvin, and Rankine—the four scales used in science, engineering, and daily life. Choose the scale you are converting from on the left and the target scale on the right, enter a numeric value, and click "Convert" to see the result. A "Swap" button reverses the direction so you can check the conversion both ways without retyping. The result panel also shows the formula that was applied, making it easy to verify or learn the relationship between scales.
Temperature conversion is something most people encounter regularly. Whether you are reading a weather forecast in a different country, following a cooking recipe that uses Fahrenheit while your oven is set to Celsius, or working on a physics problem that requires Kelvin, knowing how to switch between scales is essential. The key formulas are straightforward: °F = °C × 9/5 + 32, and K = °C + 273.15. Rankine, used mainly in some US engineering fields, relates to Kelvin the same way Fahrenheit relates to Celsius: °R = K × 9/5.
The converter runs entirely in your browser. There is no sign-up, no download, and no delay. It is designed to be mobile-friendly: the two-column layout stacks on small screens, inputs have a comfortable touch size, and the result appears right next to your input so you can compare at a glance. Results are rounded to four decimal places for clarity while remaining precise enough for scientific work.
Bookmark this page for quick access whenever you need to convert a temperature reading between Celsius, Fahrenheit, Kelvin, or Rankine. Whether you are a student, traveler, cook, or engineer, this free temperature converter provides fast, accurate, and easy-to-read results on any device.