6 mm is about 0.236 inches, or about 15/64 inch (slightly more). Divide millimeters by 25.4, because 1 inch is defined as exactly 25.4 mm.
6 mm ≈ 15/64″
Slightly more than 15/64″ (by 0.05 mm) · ≈ 0.236 in
- Inches
- ≈ 0.2362 in
- Nearest 1/16″
- 1/4″ 6 mm is 0.35 mm shorter
- Nearest 1/32″
- 1/4″ 6 mm is 0.35 mm shorter
- Nearest 1/64″
- 15/64″ 6 mm is 0.05 mm longer
How big is 6 mm?
6 mm = 6 ÷ 25.4 in ≈ 0.23622 in. On a tape measure that is 15/64 in (0.2344 in, 5.953 mm), and 6 mm is longer than that by about 0.05 mm, less than the thickness of a sheet of paper. In other metric units, 6 mm is exactly 0.6 cm and exactly 0.006 m.
Compared with other common fractions: 3/16 in is 4.7625 mm, so 6 mm is about 1.24 mm more; 1/4 in is 6.35 mm, so 6 mm is about 0.35 mm less.
Things that are about 6 mm
These are nominal sizes. Real parts vary a little with the maker, so check the part when fit matters.
An M6 bolt or screw
The “M6” label means a thread diameter of 6 mm. A standard hex head M6 bolt takes a 10 mm wrench, and an M6 socket head screw takes a 5 mm hex key.
A 6 mm drill bit
A standard metric bit size. The closest fraction bit, 15/64 in, drills a hole about 0.05 mm smaller. A 1/4 in bit drills one about 0.35 mm larger.
6 mm panel board
Plywood, MDF and similar boards are sold in 6 mm thickness. Compared with inch sizes, 6 mm is a little less than 1/4 in (6.35 mm).
A 6 mm airsoft BB
The common airsoft pellet is 6 mm across, a little under 1/4 of an inch.
A 6 mm bead
6 mm is a common round bead size in jewelry and crafts, about 0.24 of an inch across.
Nearby millimeter sizes
Decimals are rounded to 3 places. In the fraction columns, + means the value is slightly longer than the fraction, − slightly shorter, and = exact.
| Millimeters (mm) | Inches (decimal) | Nearest 1/16″ | Nearest 1/32″ |
|---|---|---|---|
| 1 mm | 0.039 | 1/16″ − | 1/32″ + |
| 2 mm | 0.079 | 1/16″ + | 3/32″ − |
| 3 mm | 0.118 | 1/8″ − | 1/8″ − |
| 4 mm | 0.157 | 3/16″ − | 5/32″ + |
| 5 mm | 0.197 | 3/16″ + | 3/16″ + |
| 6 mm | 0.236 | 1/4″ − | 1/4″ − |
| 7 mm | 0.276 | 1/4″ + | 9/32″ − |
| 8 mm | 0.315 | 5/16″ + | 5/16″ + |
| 9 mm | 0.354 | 3/8″ − | 11/32″ + |
| 10 mm | 0.394 | 3/8″ + | 13/32″ − |
| 11 mm | 0.433 | 7/16″ − | 7/16″ − |
| 12 mm | 0.472 | 1/2″ − | 15/32″ + |
| 13 mm | 0.512 | 1/2″ + | 1/2″ + |
| 14 mm | 0.551 | 9/16″ − | 9/16″ − |
| 15 mm | 0.591 | 9/16″ + | 19/32″ − |
| 16 mm | 0.63 | 5/8″ + | 5/8″ + |
| 17 mm | 0.669 | 11/16″ − | 21/32″ + |
| 18 mm | 0.709 | 11/16″ + | 23/32″ − |
| 19 mm | 0.748 | 3/4″ − | 3/4″ − |
| 20 mm | 0.787 | 13/16″ − | 25/32″ + |
Frequently asked questions
How many inches is 6 mm?
6 mm is about 0.236 inches (0.23622 in), or about 15/64 inch, slightly more.
What is 6 mm as a fraction of an inch?
About 15/64 inch. 6 mm is 0.23622 in and 15/64 in is 0.234375 in, so 6 mm is slightly more.
Is 6 mm the same as 1/4 inch?
No. 1/4 inch is 6.35 mm, which is about 0.35 mm larger than 6 mm, roughly the thickness of three sheets of paper.
How many cm is 6 mm?
6 mm is exactly 0.6 cm, because 1 cm is 10 mm.
Can I use a 1/4 inch drill bit for a 6 mm hole?
The hole will be about 0.35 mm larger than 6 mm, which is loose for a 6 mm bolt or dowel. Use a 6 mm bit when you have one.
How do I convert mm to inches?
Divide the millimeters by 25.4. For 6 mm, 6 ÷ 25.4 ≈ 0.236 inches.