Penny size to millimeters
Type a value in d to get it in mm instantly.
63.5mm
That's about the same as a siding nail (8d).
Convert the other way: mm to d
What it means
How long is that nail?
Lengths for common nails; the gauge (thickness) varies by type: common, box, sinker and finish nails of the same penny size differ in diameter.
The math
How to convert d to mm
From 2d to 10d, length (in) = penny ÷ 4 + ½; larger sizes follow the table: 16d = 3½ in, 20d = 4 in, 60d = 6 in.
Example: 8d d = 63.5 mm.
Every unit
That nail in every unit
Tables
d to mm conversion table
| d | mm |
|---|---|
| 2d d | 25.4 mm |
| 3d d | 31.75 mm |
| 4d d | 38.1 mm |
| 5d d | 44.45 mm |
| 6d d | 50.8 mm |
| 7d d | 57.15 mm |
| 8d d | 63.5 mm |
| 9d d | 69.85 mm |
| 10d d | 76.2 mm |
| 12d d | 82.55 mm |
| 16d d | 88.9 mm |
| 20d d | 101.6 mm |
| 30d d | 114.3 mm |
| 40d d | 127 mm |
| 50d d | 139.7 mm |
| 60d d | 152.4 mm |
mm to d conversion table
| mm | d |
|---|---|
| 25.4 mm | 2d d |
| 31.8 mm | 3d d |
| 38.1 mm | 4d d |
| 44.4 mm | 5d d |
| 50.8 mm | 6d d |
| 57.2 mm | 7d d |
| 63.5 mm | 8d d |
| 69.8 mm | 9d d |
| 76.2 mm | 10d d |
| 82.5 mm | 12d d |
| 88.9 mm | 16d d |
| 102 mm | 20d d |
| 114 mm | 30d d |
| 127 mm | 40d d |
| 140 mm | 50d d |
| 152 mm | 60d d |
Quick answers
Quick answers
- How many mm is 10d d?
- 10d d is 76.2 mm.
- How many mm is 8d d?
- 8d d is 63.5 mm.
The units
About these units
Penny size (d)
US nail size 2d to 60d.
Millimeters (mm)
Nail length in millimeters.
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