# 1/16" drill size

A 1/16 in drill is 0.0625 in (1.59 mm). It sits between 3/64 in and 5/64 in in the fractional series; the nearest metric drill is 1.6 mm.

## 1/16" drill data

- Series: Fractional drill
- Decimal: 0.0625 in
- Metric: 1.59 mm (1.5875 mm exact)
- Nearest metric drill: 1.6 mm (+0.013 mm)
- Nearest number drill: #52 (0.0635 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 1.55 mm | 0.0610 | −0.037 mm |
| 1.6 mm | 0.0630 | +0.013 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 3/64" | Fractional | 0.0469 | 1.19 |
| #53 | Number | 0.0595 | 1.51 |
| 1/16" | Fractional | 0.0625 | 1.59 |
| #52 | Number | 0.0635 | 1.61 |
| 5/64" | Fractional | 0.0781 | 1.98 |
| Letter A | Letter | 0.2340 | 5.94 |

## Threads this drill can tap

| Thread | Standard drill | Thread % with this drill |
|---|---|---|
| M2 × 0.4 | 1.6 mm | 79 |
| #1-72 UNF | #53 | 58 |


## FAQ

**What size is a 1/16 in drill?**
A 1/16 in drill is 0.0625 in, which is 1.59 mm (1.5875 mm exactly).

**What is the metric equivalent of a 1/16 in drill?**
The nearest metric drill is 1.6 mm, 0.013 mm larger. The other close size is 1.55 mm.

**What thread can I tap with a 1/16 in drill?**
It leaves about 79 % thread in M2 × 0.4 and 58 % in #1-72 UNF.

**Which number or letter drill is closest to 1/16 in?**
#52 (0.0635 in) is the closest, 0.0010 in larger.

Source page: https://machinistcharts.com/drill-size/1-16-inch/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)