Sewing Machine Needle Size Converter
Convert sewing machine needle sizes between metric NM and American labels like 80/12, 90/14, and 100/16. Get a quick fabric-weight match, thread note, and common needle-type suggestion.
Convert a sewing needle size
Enter either part of the package label, or choose a fabric weight to find a good starting needle size.
A metric 80 sewing machine needle is commonly labeled American 12, shown as 80/12 on packages.
How to choose after converting
- Use the converted size as a starting point, then test on a scrap of the actual fabric.
- Move smaller if the needle leaves visible holes or puckers delicate fabric.
- Move larger if the machine skips stitches, the thread shreds, or the needle bends on heavy seams.
- Match the needle point to the material: universal for many wovens, ballpoint or stretch for knits, jeans for denim, microtex for sharp precision, and leather for leather or vinyl.
Sewing machine needle size chart
| Package size | Best starting fabrics | Thread note |
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Sewing needle conversion FAQ
What does 80/12 mean on a sewing machine needle?
80/12 shows both common sizing systems. The first number, 80, is the metric NM size. The second number, 12, is the American size. It is a common all-purpose size for medium woven fabrics.
What size needle should I use for denim?
Start around 90/14 for many denim projects. For very heavy denim, thick seams, or topstitching thread, try 100/16 or 110/18 and use a jeans needle.
What needle size should I use for knits?
For many knits, start with 75/11 or 80/12 in a ballpoint, jersey, or stretch needle. Choose the exact size by fabric weight and test for skipped stitches before sewing the project.