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Machining & CNC
Convert decimal blueprint specs to fractional tooling sizes. Critical for selecting the right drill bits and reamers.
Convert decimal measurements to nearest fractions. Essential tool for machinists, woodworkers, and fabricators.
Woodworking • 1/64" • 0-1"
ChartsPrintables.com
Precision: 1/64" • Range: 0" - 1" • With Millimeters
| Decimal | Fraction | Millimeters |
|---|---|---|
| 0.0000 | 0" | 0.000 |
| 0.0156 | 1/64" | 0.397 |
| 0.0313 | 1/32" | 0.794 |
| 0.0469 | 3/64" | 1.191 |
| 0.0625 | 1/16" | 1.587 |
| 0.0781 | 5/64" | 1.984 |
| 0.0938 | 3/32" | 2.381 |
| 0.1094 | 7/64" | 2.778 |
| 0.1250 | 1/8" | 3.175 |
| 0.1406 | 9/64" | 3.572 |
| 0.1563 | 5/32" | 3.969 |
| 0.1719 | 11/64" | 4.366 |
| 0.1875 | 3/16" | 4.762 |
| 0.2031 | 13/64" | 5.159 |
| 0.2188 | 7/32" | 5.556 |
| 0.2344 | 15/64" | 5.953 |
| 0.2500 | 1/4" | 6.350 |
| 0.2656 | 17/64" | 6.747 |
| 0.2813 | 9/32" | 7.144 |
| 0.2969 | 19/64" | 7.541 |
| 0.3125 | 5/16" | 7.938 |
| 0.3281 | 21/64" | 8.334 |
| 0.3438 | 11/32" | 8.731 |
| 0.3594 | 23/64" | 9.128 |
| 0.3750 | 3/8" | 9.525 |
| 0.3906 | 25/64" | 9.922 |
| 0.4063 | 13/32" | 10.319 |
| 0.4219 | 27/64" | 10.716 |
| 0.4375 | 7/16" | 11.112 |
| 0.4531 | 29/64" | 11.509 |
| 0.4688 | 15/32" | 11.906 |
| 0.4844 | 31/64" | 12.303 |
| 0.5000 | 1/2" | 12.700 |
| 0.5156 | 33/64" | 13.097 |
| 0.5313 | 17/32" | 13.494 |
| 0.5469 | 35/64" | 13.891 |
| 0.5625 | 9/16" | 14.287 |
| 0.5781 | 37/64" | 14.684 |
| 0.5938 | 19/32" | 15.081 |
| 0.6094 | 39/64" | 15.478 |
| 0.6250 | 5/8" | 15.875 |
| 0.6406 | 41/64" | 16.272 |
| 0.6563 | 21/32" | 16.669 |
| 0.6719 | 43/64" | 17.066 |
| 0.6875 | 11/16" | 17.462 |
| 0.7031 | 45/64" | 17.859 |
| 0.7188 | 23/32" | 18.256 |
| 0.7344 | 47/64" | 18.653 |
| 0.7500 | 3/4" | 19.050 |
| 0.7656 | 49/64" | 19.447 |
| 0.7813 | 25/32" | 19.844 |
| 0.7969 | 51/64" | 20.241 |
| 0.8125 | 13/16" | 20.637 |
| 0.8281 | 53/64" | 21.034 |
| 0.8438 | 27/32" | 21.431 |
| 0.8594 | 55/64" | 21.828 |
| 0.8750 | 7/8" | 22.225 |
| 0.8906 | 57/64" | 22.622 |
| 0.9063 | 29/32" | 23.019 |
| 0.9219 | 59/64" | 23.416 |
| 0.9375 | 15/16" | 23.813 |
| 0.9531 | 61/64" | 24.209 |
| 0.9688 | 31/32" | 24.606 |
| 0.9844 | 63/64" | 25.003 |
| 1.0000 | 1" | 25.400 |
Formula: fraction = decimal × denominator
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Decimals
65
Precision
1/64" • 0-1"
PDF FILE SIZE
≈0KB
Quality
300 DPI
Quickly convert decimal readings to standard shop fractions
Locate your decimal measurement (e.g., 0.375") in the left column. The chart is sorted numerically.
Look across to the Fraction column to find the standard equivalent (e.g., 3/8").
Use the chart to see if your decimal reading falls close enough to a standard fraction for your project's needs.
Bridge the gap between digital design and physical fabrication
Convert decimal blueprint specs to fractional tooling sizes. Critical for selecting the right drill bits and reamers.
Translate digital CAD measurements (e.g., 13.4375") to markings on your analog tape measure (13 7/16").
Identify bolts, screws, and fittings by measuring them with calipers and finding the nearest fractional size.
In the US Customary system, precision tools like calipers read in decimals (0.001"), while layout tools like rulers use fractions (1/16"). Converting between them is a daily necessity in many trades. For example, 0.5 is exactly 1/2, but 0.03125 is 1/32.
| Decimal Range | Closest Fraction | Error Margin |
|---|---|---|
| 0.100 - 0.140 | 1/8" (0.125) | +/- 0.025" |
| 0.225 - 0.275 | 1/4" (0.250) | +/- 0.025" |
| 0.350 - 0.400 | 3/8" (0.375) | +/- 0.025" |
| 0.475 - 0.525 | 1/2" (0.500) | +/- 0.025" |
Use this guide when transferring digital caliper readings to a standard tape measure.
| Gap (Decimal) | Approx Fraction | Metric |
|---|---|---|
| 0.028" | ~1/32" | 0.7 mm |
| 0.032" | >1/32" | 0.8 mm |
| 0.040" | ~1/25" | 1.0 mm |
| 0.060" | ~1/16" | 1.5 mm |
| Mils (Decimal) | Fraction | Common Use |
|---|---|---|
| 6 mil (0.006") | <1/64" | Vapor Barrier / Plastic Sheeting |
| 20 mil (0.020") | ~1/50" | Pool Liner / Heavy Duty Tarp |
| 60 mil (0.060") | ~1/16" | Roof Membrane / Rubber Mats |
Complete your workshop reference collection
| Fraction | Decimal | MM |
|---|---|---|
| 1/64" | 0.0156 | 0.40 |
| 1/32" | 0.0313 | 0.79 |
| 1/16" | 0.0625 | 1.59 |
| 1/8" | 0.1250 | 3.18 |
| 3/16" | 0.1875 | 4.76 |
| 1/4" | 0.2500 | 6.35 |
| 5/16" | 0.3125 | 7.94 |
| 3/8" | 0.3750 | 9.53 |
| 1/2" | 0.5000 | 12.70 |
| 5/8" | 0.6250 | 15.88 |
Convert inch fractions to decimals for woodworking, hardware sizing, and measuring.
| Millimeters | Decimal (in) | Fraction (in) |
|---|---|---|
| 0.5 | 0.020 | 0 |
| 1 | 0.039 | 1/16 |
| 6.35 | 0.250 | 1/4 |
| 12.7 | 0.500 | 1/2 |
| 19 | 0.748 | 3/4 |
| 25.4 | 1.000 | 1 |
| 38.1 | 1.500 | 1 1/2 |
| 50.8 | 2.000 | 2 |
| 76.2 | 3.000 | 3 |
| 101.6 | 4.000 | 4 |
Convert millimeters to inches with decimals and fractions for woodworking and engineering.
| Number | Fraction | Decimal (in) | Millimeters |
|---|---|---|---|
| #80 | — | 0.0135 | 0.34 |
| #50 | — | 0.0700 | 1.78 |
| #52 | 1/16" | 0.0625 | 1.59 |
| #41 | 3/32" | 0.0938 | 2.38 |
| #22 | 5/32" | 0.1562 | 3.97 |
| #11 | 3/16" | 0.1875 | 4.76 |
| #7 | 13/64" | 0.2031 | 5.16 |
| — | — | 0.2570 | 6.53 |
| — | 3/8" | 0.3750 | 9.53 |
| — | 1/2" | 0.5000 | 12.70 |
Numbered, lettered, metric, and fractional drill bit reference.
| Inches (fraction) | Inches (decimal) | Millimeters | Centimeters |
|---|---|---|---|
| 1/4" | 0.250 | 6.35 | 0.64 |
| 1/2" | 0.500 | 12.70 | 1.27 |
| 1" | 1.000 | 25.40 | 2.54 |
| 1 1/2" | 1.500 | 38.10 | 3.81 |
| 2" | 2.000 | 50.80 | 5.08 |
| 2 1/2" | 2.500 | 63.50 | 6.35 |
| 3" | 3.000 | 76.20 | 7.62 |
| 4" | 4.000 | 101.60 | 10.16 |
| 5" | 5.000 | 127.00 | 12.70 |
| 6" | 6.000 | 152.40 | 15.24 |
Imperial to metric conversions for hardware sizing and fabrication.
Explore more: All Charts · Categories · Use Cases
Find your decimal measurement in the left column. The corresponding fraction in the right column is the nearest standard fraction. If you enabled millimeters, you can also cross-reference metric values.
The chart lists values in specific steps (like 1/64"). If your decimal falls between two rows, choose the closest one. For critical precision, ensure you select a high-precision preset (like Machining/64ths).
Different trades work to different tolerances. A carpenter framing a wall only needs 1/16" precision. A cabinet maker might need 1/32". A machinist needs 1/64" or finer. Choosing the right precision keeps the chart readable and relevant.
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