Converters
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin, including negative values where the scale allows them.
Temperature conversion
Converted temperature
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Your converted temperature will appear here after you calculate.
Worked example
What is 25 °C in Fahrenheit?
Problem
A forecast says 25 °C and you want the equivalent Fahrenheit temperature.
Solution
25 °C equals 77 °F.
Converters
How temperature conversion works
Temperature scales use offsets as well as scale factors. Celsius converts to Kelvin by adding 273.15. Fahrenheit converts through the exact relationship K = (°F + 459.67) × 5 ÷ 9. The selected output scale is then derived from Kelvin. Repeating decimal results are kept at calculation precision and shortened only for display, where approximation is marked explicitly.
Absolute zero and supported scales
This converter supports Celsius, Fahrenheit and Kelvin. Inputs below absolute zero are rejected: −273.15 °C, −459.67 °F and 0 K are the minimum physical temperatures on their respective scales.