Precision and rounding
Convert with the complete scale-and-offset formula, then round the final result. Applying only a multiplier gives an incorrect result for most Celsius or Fahrenheit pairs.
Conversion library
Temperature converters
Convert between Celsius, Fahrenheit, Kelvin, and Rankine with the correct scale and offset for every pair.
4 units12 directional pairsExact formulas
Common starting points
Popular temperature conversions
Celsius to FahrenheitFahrenheit to CelsiusCelsius to KelvinKelvin to CelsiusFahrenheit to KelvinKelvin to Fahrenheit
Browse popular conversions across all categories →Essential context
Understanding temperature conversions
Temperature scales do not share both the same zero point and degree size. Celsius and Fahrenheit need an offset, while Kelvin and Rankine are absolute scales beginning at absolute zero.
A distinction that matters
Kelvin is written without a degree sign. A temperature interval and an absolute temperature can also require different interpretation in technical work.
Complete directory
Browse by starting unit
Choose the unit you have, then select the unit you need. Every destination opens a dedicated static page with an interactive converter, formula, worked example, and reference table.
From Celsius
°CFrom Fahrenheit
°FFrom Kelvin
KFrom Rankine
°REnjoy Convr? Follow us on Google
Add convr.tools as a Preferred Source so our converters and guides show up first in Google Search, Top Stories, AI Overviews and Discover.
Add as a preferred source on Google