Next we add 1 4/32 (Triangle A )+1/32 (Triangle B)=1 5/32.” So the final measurement is 1 5/32. To do the math properly we need to get our common denominator so 1 1/8' becomes 1 4/32'. While I like my dial calipers without a vernier scale, I like the vernier scale on my micrometer for precise measurements. Now looking at the table on the right side of the scale (Triangle C) we see that it’s graduations are in 1/128” so we will add 4/128 or 1/32 of an inch to our 1 1/8 ”. I thought you explained the use of calipers perfectly as an introduction. Then we look at the hundredths: 2.41 isnt even close. So we know its 2.4 because thats the closest number to the left of the zero. Youre just looking at which small slidey line best matches up with a big non-slidey line, and they should get incrementally closer to matching up. So go along the vernier scale and find the only mark that lines up perfectly with any hash mark on the main scale (Triangle B). Its easier to see on an actual vernier caliper. The vernier is a convenient tool to use when measuring the length of an object, the outer diameter (OD) of a round or cylindrical object, the inner diameter (ID). That puts our first number at 1 1/8 ” now we want to know how much further the mark A is from the 1 1/8' and then we will add these two numbers together to get the proper measurement. It is two hash marks past the the 1” mark, 2 hash marks would be 2/16 or 1/8 of an inch. This model is in fractional increments instead of decimal, so our reference point is where the 0 on the imperial vernier scale lines up on the main scale (Triangle A). If you need 3D model of a Vernier caliper, please visit this page: 3D model of Vernier caliper.

It is capable of measuring internal and external dimensions and can also be used as a depth gauge. When using a vernier scale you should check to see what kind of measurement the caliper is calibrated for. Vernier calipers are used for more accurate measuring than can be achieved with a measuring rule or a slide caliper.

Vernier calipers how to use