Practical measurement guide
27/64 Inch to MM and CM
Convert 27/64 inch to decimal inches, centimeters, and millimeters with ruler-position and rounding guidance.
27/64 inch equals 0.421875 decimal inches, 1.071563 cm, and 10.715625 mm.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
mm
Try a value
Fractions
0.421875 in = 10.715625 mm
0.421875 in × 25.4 = 10.715625 mm
Decimal inches0.421875 in
Feet + inches0 ft 0.4219 in
Nearest 1/16 inch7/16"
Fraction inch result
27/64 inch equals 0.421875 inches, 1.071563 cm, and 10.715625 mm.
Calculation method
First divide 27 by 64 to get decimal inches. Then multiply decimal inches by 25.4 for millimeters or by 2.54 for centimeters.
Nearby ruler fractions
| Fraction | Decimal inches | Millimeters |
|---|---|---|
| 26/64 in | 0.40625 | 10.31875 mm |
| 27/64 in | 0.421875 | 10.715625 mm |
| 28/64 in | 0.4375 | 11.1125 mm |
Precision note
This page keeps the fraction exact and rounds the metric result only for display. Use 64ths when the tool or ruler supports fine increments; otherwise round to 32nds, 16ths, or 8ths.
Related measurement tools
Frequently asked questions
What is 27/64 inch as a decimal?
27/64 inch is 0.421875 decimal inches.
How many mm is 27/64 inch?
27/64 inch equals 10.715625 millimeters.
Is the fraction simplified?
Yes. This page uses a canonical common ruler fraction and does not publish duplicate simplified equivalents.