Convert 8 mm to fractional inches

"Millimeters to Fractional Inches" Calculator
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mm
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How many fractional inches in 8 millimeters?

Answer

8 mm ≈ 5/16″

8 mm ≈ 0.315″ · decimal inches

Nearest 1/64″ mark: 5/16″ = 7.9375 mm, 0.0625 mm short of 8 mm.

01/41/23/4105101520inmm8 mm5/16″

8 ÷ 25.4 ≈ 0.315″; 8 ÷ 25.4 × 64 ≈ 20.1575 → 20/64″ = 5/16″

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Millimeters to Fractional Inches Conversion Table

mmFractional InchesDecimal Inches
1≈ 3/64″≈ 0.0394″
2≈ 5/64″≈ 0.0787″
3≈ 1/8″≈ 0.1181″
4≈ 5/32″≈ 0.1575″
5≈ 13/64″≈ 0.1969″
6≈ 15/64″≈ 0.2362″
7≈ 9/32″≈ 0.2756″
8≈ 5/16″≈ 0.315″
9≈ 23/64″≈ 0.3543″
10≈ 25/64″≈ 0.3937″
11≈ 7/16″≈ 0.4331″
12≈ 15/32″≈ 0.4724″
13≈ 33/64″≈ 0.5118″
14≈ 35/64″≈ 0.5512″
15≈ 19/32″≈ 0.5906″
16≈ 5/8″≈ 0.6299″
17≈ 43/64″≈ 0.6693″
18≈ 45/64″≈ 0.7087″
19≈ 3/4″≈ 0.748″
20≈ 25/32″≈ 0.7874″
21≈ 53/64″≈ 0.8268″
22≈ 55/64″≈ 0.8661″
23≈ 29/32″≈ 0.9055″
24≈ 15/16″≈ 0.9449″
25≈ 63/64″≈ 0.9843″
26≈ 1 1/32″≈ 1.0236″
27≈ 1 1/16″≈ 1.063″
28≈ 1 7/64″≈ 1.1024″
29≈ 1 9/64″≈ 1.1417″
30≈ 1 3/16″≈ 1.1811″

FAQ

How many fractional inches in 8 millimeters?

8 mm ≈ 5/16″

What is the formula to convert 8 mm to fractional inches?

The formula is: inches = mm ÷ 25.4. For 8 mm: 8 ÷ 25.4 ≈ 0.315″, nearest SAE fraction: 5/16″.

What are SAE fractions and why convert mm to fractional inches?

SAE fractions are standard inch sizes with denominators of 2, 4, 8, 16, 32, 64. They are used in American tools, automobiles, and fasteners.

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