How do I space buttons evenly?

Measure the total button band length, subtract the offset from each end, then divide the remaining length by (number of buttons minus 1). This gives the distance between each button. The top and bottom buttons should be offset from the edges.

How far from the edge should the first and last buttons be?

Typically 1-2cm from each end. The exact position depends on the garment design. For cardigans with a collar, the top button is usually further from the edge (3-5cm) to allow the collar to fold.

How many buttons does a cardigan need?

A standard adult cardigan uses 5-8 buttons depending on length. A short cropped cardigan may need only 3-4. A long coat-style may need 8-10. Space buttons every 7-10cm for a balanced look.

Should I mark button positions before knitting the buttonhole band?

Yes. Sew buttons on the button band first, then use those positions to place buttonholes on the opposite band. This ensures perfect alignment. Pin or mark all positions before knitting any buttonholes.

How do I convert button position to rows?

Multiply the position in cm by your row gauge per cm. For example, a button at 8cm with 3 rows per cm means the buttonhole goes on row 24. Round to the nearest row.

KnitCalcs

Button Spacing Calculator — Even Button Placement

Calculate even button placement along a cardigan or garment button band.

Button Band Length

Total length of the button band

Number of Buttons

Top Offset

Distance from top edge to first button

Bottom Offset

Distance from bottom edge to last button

How We Calculate This

This calculator divides the available band length evenly between buttons, with offsets at top and bottom.

The formula

Spacing = (Band length - Top offset - Bottom offset) / (Buttons - 1)

Frequently Asked Questions

Related Calculators

Blocking Measurements Calculator

Calculate target blocking dimensions based on desired finished size and fibre type.

Mattress Stitch Calculator

Calculate yarn needed for mattress stitch seaming based on seam length.

Zip Length Calculator

Calculate the correct zip length for cardigans and bags.

Seaming Yarn Calculator

Calculate total yarn needed for seaming all pieces of a garment.

Pom Pom Calculator

Calculate yarn needed to make pom poms of various sizes.

Last updated: February 2026

All calculations are estimates based on standard yarn weights and gauge. Results may vary with individual tension, yarn brand, and needle size.