📐 Design Scaling Calculator

Stitches follow the area, not the width

Scaling a design stretches it in two directions at once, so the stitched area — and the stitch count needed to fill it at the same density — goes up with the square of the scale:

factor = (scale % / 100)²
new stitches = original × factor
10,000 at 150 % → 10,000 × 1.5² = 10,000 × 2.25 = 22,500

The same law runs downhill: 80 % is 0.64, so a 10,000-stitch design shrinks to 6,400. Run time and thread track stitch count, so that 150 % logo costs 2.25 times the minutes and thread, not half as much again.

When the estimate holds, and when it does not

• It assumes stitches are recalculated. Digitising software, or a machine with true resizing, regenerates the fill and holds density constant. A plain percentage change on the machine screen usually keeps all 10,000 stitches and spreads them over 2.25 times the area instead, dropping density to 44 % — the gappy look blamed on the file.
• Satin columns set the ceiling. A 6 mm column at 150 % becomes 9 mm, near the 10–12 mm limit where long stitches snag and should be split or converted to a fill.
• Small text sets the floor. Lettering under about 5 mm cap height will not hold, so a 7 mm letter at 70 % is out of reach whatever the count says.

Frequently asked questions