Degrees Fahrenheit to degrees Celsius Converter

Enter the degrees Fahrenheit, then press Calculate. The degrees Celsius stay hidden while you type.

Press Calculate after the entries are in.

What this temperature conversion is for

Use this page when a measurement is written in degrees Fahrenheit and the next step needs degrees Celsius. The number stays blank until you press Calculate, so a half-typed entry is never mistaken for the answer.

The factor

Change degree Fahrenheit to Celsius first, then into degree Celsius. Celsius and kelvin use the same size step. Fahrenheit and Rankine use a smaller step: nine of those degrees fit in five Celsius degrees. °C = (°F − 32) × 5/9. K = °C + 273.15. °R = (°F + 459.67).

A worked example

68 degrees Fahrenheit are 20 degrees Celsius. Multiply the result by the reverse factor if you want the original number back.

How to check it

Write the factor down, do the multiply on paper, and compare it with the result card. If you change a sentence on this page, edit the HTML file and reload. The form and this note live in the same file.

The reverse conversion is degrees Celsius to degrees Fahrenheit. A nearby pair in the same units is degrees Delisle to degrees Celsius. When the converted number is the input to a job, continue with the oven temperature conversion.