# #61 drill size

A #61 drill is 0.0390 in (0.99 mm). It sits between #62 and #60 in the number series; the nearest metric drill is 1.0 mm.

## #61 drill data

- Series: Number drill
- Decimal: 0.0390 in
- Metric: 0.99 mm (0.9906 mm exact)
- Nearest metric drill: 1.0 mm (+0.009 mm)
- Nearest fractional: 1/32" (0.0312 in)

## Nearest metric drills

| Metric drill | Inch | Difference |
|---|---|---|
| 0.95 mm | 0.0374 | −0.041 mm |
| 1.0 mm | 0.0394 | +0.009 mm |

## Nearby inch drills

| Drill | Series | Inch | mm |
|---|---|---|---|
| 1/32" | Fractional | 0.0312 | 0.79 |
| #62 | Number | 0.0380 | 0.97 |
| #61 | Number | 0.0390 | 0.99 |
| #60 | Number | 0.0400 | 1.02 |
| 3/64" | Fractional | 0.0469 | 1.19 |
| Letter A | Letter | 0.2340 | 5.94 |


## FAQ

**What size is a #61 drill?**
A #61 drill is 0.0390 in, which is 0.99 mm (0.9906 mm exactly).

**What is the metric equivalent of a #61 drill?**
The nearest metric drill is 1.0 mm, 0.009 mm larger. The other close size is 0.95 mm.

**Which fractional drill is closest to #61?**
1/32 in (0.0312 in) is the closest, 0.0077 in smaller.

Source page: https://machinistcharts.com/drill-size/number-61/
Updated: 2026-10-06
Publisher: MachinistCharts (https://machinistcharts.com)