Number drill to fractional inches
Type a value in drill to get it in in (fraction) instantly.
≈13/64in (fraction)
That's about the same as the tap drill for 1/4-20 (#7).
What it means
How wide is that hole?
Sizes from ASME B94.11M. Between two listed drills the label shows the nearest one; the millimeters are exact.
The math
How to convert drill to in (fraction)
Number and letter drills are a table: #29 = 0.1360 in = 3.454 mm, #7 = 0.2010 in, F = 0.2570 in. Millimeters = inches × 25.4.
Example: #7 drill = ≈13/64 in (fraction).
Every unit
That drill in every system
Tables
drill to in (fraction) conversion table
| drill | in (fraction) |
|---|---|
| #1 drill | ≈15/64 in (fraction) |
| #3 drill | ≈7/32 in (fraction) |
| #5 drill | ≈13/64 in (fraction) |
| #7 drill | ≈13/64 in (fraction) |
| #10 drill | ≈3/16 in (fraction) |
| #15 drill | ≈3/16 in (fraction) |
| #20 drill | ≈5/32 in (fraction) |
| #21 drill | ≈5/32 in (fraction) |
| #25 drill | ≈5/32 in (fraction) |
| #29 drill | ≈9/64 in (fraction) |
| #30 drill | ≈1/8 in (fraction) |
| #33 drill | ≈7/64 in (fraction) |
| #36 drill | ≈7/64 in (fraction) |
| #40 drill | ≈3/32 in (fraction) |
| #43 drill | ≈3/32 in (fraction) |
| #50 drill | ≈1/16 in (fraction) |
| #60 drill | ≈3/64 in (fraction) |
| #70 drill | ≈1/32 in (fraction) |
| #80 drill | ≈1/64 in (fraction) |
in (fraction) to drill conversion table
| in (fraction) | drill |
|---|---|
| 1/64 in (fraction) | #78 drill |
| 1/32 in (fraction) | #68 drill |
| 3/64 in (fraction) | #56 drill |
| 1/16 in (fraction) | #52 drill |
| 3/32 in (fraction) | #42 drill |
| 7/64 in (fraction) | #35 drill |
| 1/8 in (fraction) | #30 drill |
| 9/64 in (fraction) | #28 drill |
| 5/32 in (fraction) | #22 drill |
| 3/16 in (fraction) | #12 drill |
| 13/64 in (fraction) | #6 drill |
| 7/32 in (fraction) | #2 drill |
Quick answers
Quick answers
- How many in (fraction) is #1 drill?
- #1 drill is ≈15/64 in (fraction).
- How many in (fraction) is #10 drill?
- #10 drill is ≈3/16 in (fraction).
- How many in (fraction) is #7 drill?
- #7 drill is ≈13/64 in (fraction).
The units
About these units
Number drill (drill)
Number drills #1 to #80.
Fractional inches (in (fraction))
The nearest 64th of an inch; ≈ marks a size that falls between marks.
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