3 1/8 inches to decimal

3 1/8 inches is inches as a mixed number. Here we will teach you how to convert 3 1/8 inches to decimal, and as an added bonus you will also learn how to convert 3 1/8 inches to decimal foot.

We start by labeling the numbers in 3 1/8 inches as follows: 3 1/8 inches = W N/D inches and then we use the mixed number inches to decimal formula displayed below to convert the mixed number inches to decimal inches:

((W x D) + N) / D

Looking at our labels and the formula, you see that W equals 3, N equals 1, and D equals 8. Therefore, when we enter 3 1/8 inches into our formula we get this:

((3 x 8) + 1)/8
= 3.125 inches

Thus, 3 1/8 inches to decimal is 3.125. Moving on, note that there are 12 inches in a foot. Therefore, to convert 3 1/8 inches to foot, you simply divide the above decimal answer by 12 like so:

3.125 / 12
= 0.260416667 foot

That's it folks. In summary, 3 1/8 inches is the same as 3.125 inches and 3 1/8 inches is also the same as 0.260416667 foot.

Inches to Decimal Calculator
Please enter another length of inches below for us to convert to decimal. You can enter a number (a.a), a fraction (a/b), or a mixed number (a b/c) similar to 3 1/8 like we calculated on this page.

3 1/9 inches to decimal
Here is the next length of inches that we have converted to decimal.

More information: You may have correctly concluded that W = Whole Number, N = Numerator, and D = Denominator. In addition to using the formula above to convert 3 1/8 inches to decimal, you can actually use it to convert any mixed number to a decimal number.