Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Type in any field and all others update. Free, no signup required.
What is Temperature Converter?
Temperature is measured in four main scales used in science and everyday life. Celsius (°C) is the standard in most countries and in scientific contexts. Fahrenheit (°F) is primarily used in the United States. Kelvin (K) is the SI base unit of thermodynamic temperature, starting at absolute zero (0 K = -273.15°C). Rankine (°R) is an absolute scale based on Fahrenheit, used in some engineering applications.
Temperature conversion comes up constantly in cooking (recipe conversions), science (chemistry and physics calculations), travel (weather forecasts in unfamiliar units), and engineering (thermal calculations). The most common conversions are Celsius to Fahrenheit and back, but knowing how to work with Kelvin is essential for scientific and technical work.
All conversions happen instantly in your browser as you type. Enter a value in any field and all other units update simultaneously. No data is sent to any server.
How to use
Frequently asked questions
Absolute zero is 0 K = -273.15°C = -459.67°F. It is the lowest theoretically possible temperature — the point at which particles have minimum thermal motion.
The commonly cited normal body temperature is 98.6°F (37°C). Modern research suggests the average varies between individuals and throughout the day, typically 97–99°F (36.1–37.2°C).
°F = (°C × 9/5) + 32. Reverse: °C = (°F - 32) × 5/9.
Yes. All conversions run in your browser. Nothing is sent to any server.