Many times in my practice life has presented me a little problem, How to convert millimeters to fractions known inch ?.

It is well known by all that in order to convert millimeters to inches, what we do is split between 25.4 millimeters or multiply by 0.03937 mm, which will give us results in a figure mils. Well then, after a good time experimenting and doing some calculations with fractions and integers, I found an easy way to solve this little dilemma and today I want to share it with you, so without further ado here are the steps:

1. millimeters are taken and multiplied by “5.03937”
2. This operation is positioned as the numerator in a new fraction.
3. This fraction is placed as the denominator the number “128”.
4. The fraction is simplified to a minimum.

Here is an example:




We all know that 1/2 ” is equivalent to 12.7 millimeters, now see if the above procedure serves to convert millimeters to known fractions of an inch .

1. 12.7 x 5.03937 = 63.999999, which is equivalent to 64 in our case
2. Now we set up a fraction whose numerator is the previous result, or 64 / .
3 Then it is so; 64/128
4. mímima simplifying its previous fractional expression we have: 64/128 = 32/64 = 16/32 = 8/16 = 4/8 = 2/4 = 1/2

The latter value is an irreducible term, so it is the value that we need find, then using this process have found that 12.7 mm is equivalent to 1/2 “.

Now another example:

To that fractional amounts 7.54?

7.54 X 5.03937 = 37.99, is approximately 38, then left and 38/128 “= 19/64”.

This procedure is váildo or apply for all fractions caliper or gauge measuring range whose minimum is 1/128 “.

And more: On-Line Calculator whit this procedure: https://www.easymetalworking.mahtg.com/conversores/convert-millimeters-to-inches.html