Screw number to millimeters
Type a value in screw to get it in mm instantly.
4.826mm
That's about the same as a door-hinge screw (#10).
Convert the other way: mm to screw
What it means
How thick is that screw?
Major (outside) thread diameter. The number gives the thickness only; length and thread pitch are separate (8-32 × 1/2" is a #8, 32 threads per inch, half an inch long).
The math
How to convert screw to mm
Diameter (in) = 0.060 + 0.013 × number; for #00 use −1, #000 −2. Millimeters = inches × 25.4.
Example: #10 screw = 4.826 mm.
Every unit
That screw in every unit
Tables
screw to mm conversion table
| screw | mm |
|---|---|
| #0 screw | 1.524 mm |
| #1 screw | 1.8542 mm |
| #2 screw | 2.1844 mm |
| #3 screw | 2.5146 mm |
| #4 screw | 2.8448 mm |
| #5 screw | 3.175 mm |
| #6 screw | 3.5052 mm |
| #8 screw | 4.1656 mm |
| #10 screw | 4.826 mm |
| #12 screw | 5.4864 mm |
| #14 screw | 6.1468 mm |
| #16 screw | 6.8072 mm |
| #18 screw | 7.4676 mm |
| #20 screw | 8.128 mm |
| #24 screw | 9.4488 mm |
mm to screw conversion table
| mm | screw |
|---|---|
| 1.52 mm | #0 screw |
| 1.85 mm | #1 screw |
| 2.18 mm | #2 screw |
| 2.51 mm | #3 screw |
| 2.84 mm | #4 screw |
| 3.18 mm | #5 screw |
| 3.51 mm | #6 screw |
| 4.17 mm | #8 screw |
| 4.83 mm | #10 screw |
| 5.49 mm | #12 screw |
| 6.15 mm | #14 screw |
| 6.81 mm | #16 screw |
| 7.47 mm | #18 screw |
| 8.13 mm | #20 screw |
Quick answers
Quick answers
- How many mm is #1 screw?
- #1 screw is 1.8542 mm.
- How many mm is #10 screw?
- #10 screw is 4.826 mm.
The units
About these units
Screw number (screw)
US machine and wood screw numbers, #0000 to #24.
Millimeters (mm)
The major diameter in millimeters.
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