27/32 inch in decimal and mm
Decimal inches
0.84375 in
0.8438 in to four places
Millimetres
21.43125 mm
From the standard, the international inch, 25.4 mm exactly
The math
- A fraction is its top number divided by its bottom number: 27/32 in = 27 ÷ 32 = 0.84375 in.
- An inch is exactly 25.4 mm, so 0.84375 × 25.4 = 21.43125 mm, or 21.431 mm to three places.
- In feet, divide by 12: 0.84375 ÷ 12 = 0.070313 ft. In centimetres, divide the mm by 10: 2.143125 cm.
- The same size in finer steps: 27/32 = 54/64. A tape marked in 16ths, 32nds or 64ths shows it at those marks.
27/32 to the nearest 1/8, 1/16
A tape or rule marked more coarsely than 32ths can’t show 27/32 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 | 7/8 in | +0.03125 | +0.794 |
| 1/16 | 7/8 in | +0.03125 | +0.794 |
Drills, plywood and lumber at 27/32 in
| Drill | Size | Off by |
|---|---|---|
| 21 mm | 0.8268 in | −0.4312 mm |
| 21.5 mm | 0.8465 in | +0.0688 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.