9/16 inch in decimal and mm
Decimal inches
0.5625 in
Millimetres
14.2875 mm
From the standard, the international inch, 25.4 mm exactly
The math
- A fraction is its top number divided by its bottom number: 9/16 in = 9 ÷ 16 = 0.5625 in.
- An inch is exactly 25.4 mm, so 0.5625 × 25.4 = 14.2875 mm, or 14.288 mm to three places.
- In feet, divide by 12: 0.5625 ÷ 12 = 0.046875 ft. In centimetres, divide the mm by 10: 1.42875 cm.
- The same size in finer steps: 9/16 = 18/32 = 36/64. A tape marked in 16ths, 32nds or 64ths shows it at those marks.
9/16 to the nearest 1/8
A tape or rule marked more coarsely than 16ths can’t show 9/16 exactly. The nearest marks, and how far off each is (plus means the mark is bigger; a size exactly halfway goes to the bigger mark):
| Nearest | Mark | Off by (in) | Off by (mm) |
|---|---|---|---|
| 1/8 | 5/8 in | +0.0625 | +1.588 |
Drills, plywood and lumber at 9/16 in
| Drill | Size | Off by |
|---|---|---|
| 14 mm | 0.5512 in | −0.2875 mm |
| 14.5 mm | 0.5709 in | +0.2125 mm |
Every drill is on the drill bit size chart.
Bits of this size
Sizes either side
Every size is on the fraction to decimal chart; any other size goes in the fraction to decimal calculator.