Fahrenheit to Celsius Converter

Subtract 32 from the Fahrenheit reading, then multiply by 5/9. Written out that is C = (F - 32) x 5/9. For example, 212 F becomes (212 - 32) x 5/9 = 100 C, the boiling point of water.

Many conversions land on repeating decimals because of the 5/9 factor. The tool rounds to six decimal places for display, so 72 F reads as 22.222222 C rather than an endless string, while clean values like 32 F show as a plain 0.

The classic average of 98.6 F converts to exactly 37 C. A reading of 100.4 F, which is 38 C, is the usual clinical threshold for a fever, though normal body temperature varies a little between people and times of day.

Handy anchors are 32 F = 0 C where water freezes, 50 F = 10 C, 68 F = 20 C for room temperature, 98.6 F = 37 C for body heat and 212 F = 100 C where water boils at sea level.

Apply the same formula. 350 F is about 176.67 C, 375 F about 190.56 C, 400 F about 204.44 C and 450 F about 232.22 C. Cookbooks usually round these to 180, 190, 200 and 230 C for the nearest dial mark.

They meet at minus 40 degrees. Minus 40 F equals minus 40 C exactly, the single point where the two scales cross, which makes it a quick way to sanity-check any conversion tool.

Yes. The fields are bidirectional, so typing into the Celsius box converts to Fahrenheit using C x 9/5 + 32. If you prefer a page dedicated to that direction, use the Celsius to Fahrenheit converter linked nearby.

No practical limit. Negative temperatures, decimals and very large numbers all convert correctly. Non-numeric text simply leaves the opposite field blank until you enter a valid number.

No. The conversion runs entirely in your browser with no network request, so the temperatures you enter never leave your device and the tool works offline once loaded.