// Converter
Temperature Converter online
Convert between Celsius, Fahrenheit and Kelvin - real-time
by
CHUNKY
MUNSTER
MUNSTER
Temperature Converter provides instant, bidirectional conversion between the world's major heat measurement scales. By entering a value into any field, you trigger a real-time recalculation using standard linear formulas: C = (F−32) × 5/9 and K = C + 273.15. This kelvin calculator handles high-precision scientific data with ease, rounding to four decimal places to minimize floating-point errors while maintaining technical accuracy.
This thermal conversion utility accepts negative inputs down to −273.15 °C, the point of absolute zero. The interface includes reference markers for the freezing and boiling points of water according to the ITS-90 scale, alongside average human body temperature. Whether you are performing a simple fahrenheit to celsius swap or a complex rankine converter calculation, the logic runs entirely in your local browser environment for maximum privacy and speed.
Multiply the Celsius value by 9/5 and add 32. So 100 °C × 9/5 = 180, plus 32 gives 212 °F. The reverse is (F − 32) × 5/9.
Kelvin is defined so that the triple point of water is exactly 273.16 K. That places absolute zero at −273.15 °C - the extra 0.15 isn't a rounding error, it's part of the SI definition.
Currently only Celsius, Fahrenheit and Kelvin are shown. Rankine equals Fahrenheit + 459.67, and Réaumur equals Celsius × 0.8 if you need to convert manually.
Most cross-scale conversions are non-integer - 100 °F is exactly 37.7778 °C (with rounding). The output is truncated to four decimal places to keep it readable while staying accurate.
Bookmark this page for your next physics lab or engineering task, and explore our other unit conversion utilities. From simple daily checks to complex scientific modeling, this reliable Temperature Converter is your go-to for accurate results.