Convert 20 mm to fractional inches

"Millimeters to Fractional Inches" Calculator
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How many fractional inches in 20 millimeters?

Answer

20 mm ≈ 25/32″

20 mm ≈ 0.7874″ · decimal inches

Nearest 1/64″ mark: 25/32″ = 19.84375 mm, 0.15625 mm short of 20 mm. On a tape measure (1/16″): 13/16″ = 20.6375 mm, 0.6375 mm over 20 mm.

01/41/23/4105101520inmm20 mm25/32″

20 ÷ 25.4 ≈ 0.7874″; 20 ÷ 25.4 × 64 ≈ 50.3937 → 50/64″ = 25/32″

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Millimeters to Fractional Inches Conversion Table

mmFractional InchesDecimal Inches
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″
31≈ 1 7/32″≈ 1.2205″
32≈ 1 17/64″≈ 1.2598″
33≈ 1 19/64″≈ 1.2992″
34≈ 1 11/32″≈ 1.3386″

FAQ

How many fractional inches in 20 millimeters?

20 mm ≈ 25/32″

What is the formula to convert 20 mm to fractional inches?

The formula is: inches = mm ÷ 25.4. For 20 mm: 20 ÷ 25.4 ≈ 0.7874″, nearest SAE fraction: 25/32″.

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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