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Millimeters to fractional inches

Convert millimeters to the nearest 1/16, 1/32 or 1/64 inch, like the marks on a tape measure, with the math shown step by step.

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Inches (fraction)
7/16 in

10.88 mm ≈ 7/16 in

Exact size 0.428 in · 7/16 in is 0.23 mm over

Also equals

How it works

in = mm ÷ 25.4

One inch is exactly 25.4 millimeters, so dividing by 25.4 gives inches as a decimal. To read that on a tape measure, count how many 1/16-inch marks it covers, round to the nearest mark, then simplify the fraction.

  1. Divide by 25.4 to get inches 10.88 ÷ 25.4 = 0.4283 in
  2. Count the 1/16 in marks 0.4283 × 16 = 6.85 → nearest mark: 7
  3. Simplify the fraction 7/16 in = 7/16 in
Picture it

10.88 mm is 0.428 in, between marks. The nearest mark is 7/16 in (0.23 mm over).

Nearest mark Exact size

Nearby values

Millimeters Inches (fraction) Exact Centimeters
7.88 mm 5/16 in 0.31 0.79
8.88 mm 3/8 in 0.35 0.89
9.88 mm 3/8 in 0.39 0.99
10.88 mm 7/16 in 0.43 1.09
11.88 mm 7/16 in 0.47 1.19
12.88 mm 1/2 in 0.51 1.29
13.88 mm 9/16 in 0.55 1.39

Printed from rocketcalc.io/length/mm-to-inch-fractions/10.88