Convert Fahrenheit Centigrade Calculator

How the answer is presented. The conversion itself is identical in every mode.
Ruler reading only. 16 for a standard tape measure, 32 or 64 for a machinist rule.
Height reading only, when the source unit is feet.
Height reading only, added to the feet above.
Applied to the display value; the exact result is also returned.
Converted value
-17.222222
Unit Converter
Unrounded result
-17.222222
Conversion
1 F = -17.22222222 C
Reading
-17.22222222 C
Reverse conversion
1
Worked out from NIST Special Publication 811, Guide for the Use of the International System of Units and 1 other source.

How this is worked out

2 steps
  1. Temperature scales have different zero points, so this uses the exact scale formulas.
  2. 1 F = -17.22222222 C

Results are general information, not financial, tax, legal, medical or engineering advice.