Temperature Converters
Convert temperature between Celsius, Fahrenheit, and Kelvin scales. Each calculator runs entirely in your browser, updates as you type, and includes a worked reference table plus the conversion formula.
Temperature is the everyday measurement that sits behind weather forecasts, oven recipes, body-temperature readings, scientific lab work, and HVAC settings. Three scales still share the job. Celsius — anchored to the freezing and boiling points of water at standard atmospheric pressure — dominates the world outside the United States. Fahrenheit, devised by Daniel Gabriel Fahrenheit in 1724, anchors American weather, cooking, and clinical thermometers. Kelvin, the SI base unit, starts at absolute zero and underpins every scientific publication, engineering thermal-management calculation, and astrophysics paper. Unlike length or weight, temperature conversions are non-linear because the scales have different zero points — Celsius and Fahrenheit need both an offset and a multiplier, while Celsius and Kelvin share a slope but differ by exactly 273.15 degrees.
Choose a conversion
Celsius to Fahrenheit
International weather, oven recipes, and travel thermometers.
Fahrenheit to Celsius
American weather translated for global audiences.
Celsius to Kelvin
Lab work, thermal calculations, and physics problem sets.
Kelvin to Celsius
Scientific data translated for everyday temperature intuition.
Fahrenheit to Kelvin
American engineering specs translated into SI units.
Kelvin to Fahrenheit
Astrophysics and thermal science for US-trained engineers.