Standard ChartsMetric Charts

This chart converts standard measurements to metric(mm) and decimal inch measurements. The standard to metric measurement conversion formula is 1 inch = 25.4 mm.

Inch(fractions) to mm conversion calculations are approximate. For exact conversion from inches to mm the decimal inch measurement is accurate. Fractional values are always approximate while decimal values are exact.

Inch to MM Conversion Chart

This is a measurement chart, for a socket size conversion chart visit the HOME page.

Inches to MM Conversion Chart

Inches (fraction) Inches (decimal) Millimeters (mm)
1/32 " 0.03125 " 0.79375 mm
1/16 " 0.0625 " 1.5875 mm
1/8 " 0.125 " 3.175 mm
3/16 " 0.1875 " 4.7625 mm
1/4 " 0.25 " 6.35 mm
5/16 " 0.3125 " 7.9375 mm
3/8 " 0.375 " 9.525 mm
7/16 " 0.4375 " 11.1125 mm
1/2 " 0.5 " 12.7 mm
9/16 " 0.5625 " 14.2875 mm
5/8 " 0.625 " 15.875 mm
11/16 " 0.6875 " 17.4625 mm
3/4 " 0.75 " 19.05 mm
13/16 " 0.8125 " 20.6375 mm
7/8 " 0.875 " 22.225 mm
15/16 " 0.9375 " 23.8125 mm
1 " 1.00 " 25.4 mm
1 1/16 " 1.0625 " 26.9875 mm
1 1/8 " 1.125 " 28.575 mm
1 3/16 " 1.1875 " 30.1625 mm
1 1/4 " 1.25 " 31.75 mm
1 5/16 " 1.3125 " 33.3375 mm
1 3/8 " 1.375 " 34.925 mm
1 7/16 " 1.4375 " 36.5125 mm
1 1/2 " 1.50 " 38.1 mm
1 9/16 " 1.5625 " 39.6875 mm
1 5/8 " 1.625 " 41.275 mm
1 11/16 " 1.6875 " 42.8625 mm
1 3/4 " 1.75 " 44.45 mm
1 13/16 " 1.8125 " 46.0375 mm
1 7/8 " 1.875 " 47.625 mm
1 15/16 " 1.9375 " 49.2125 mm
2 " 2.0 " 50.8 mm

Frequently asked Conversion questions

What is 1 inch equal to in mm?

1 inch = 25.4 millimeters.

How do you measure 1/4 inch in mm?

To convert 1/4 inch to mm first divide 1 by 4 which is 0.25. Next multiply the number of millimeters in an inch(25.4) by 0.25. The math: 25.4 mm x 0.25 = 6.35 mm.

What size is 10 mm in inches?

10mm = 3/8 inch.

Is 50mm 2 inches?

Almost. 50mm = 1.97 inches as can be seen in the decimal column of this chart.

Is an inch exactly 25.4 mm?

Yes, 1 inch = 25.4 mm exactly.

What is 3/8ths of an inch in mm?

3/8 inch = 9.53 mm.

How many inch is 9mm?

9mm = 5/16 inch.

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MM to Inch Conversion Chart

MM to Inch Conversion Chart

A simple measurement chart to help you convert millimeters(mm) to Inches and fractions of inches. Metric to Standard chart includes decimal values.

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