Do I need to buy hook and loop tape separately?

Hook-and-loop tape comes in two forms: on a roll with hook and loop side by side, or as separate hook and loop rolls. Buying separately lets you position each side independently. Both sides are needed for a closure.

What type of hook-and-loop tape should I use?

Sew-on tape is most versatile and durable. Adhesive-backed tape is quick but may not withstand washing. Iron-on tape bonds with heat. For garments, always use sew-on tape for durability.

What width hook-and-loop tape should I use?

16mm for lightweight closures and small items. 20mm is the most common for garment overlaps and cushion covers. 25mm and wider for bags, equipment covers, and heavy-duty applications.

How do I sew hook-and-loop tape?

Use a standard presser foot and medium stitch length. Sew around all four edges of each piece. Use a polyester thread — cotton thread can be cut by the hooks. Round the corners to prevent peeling.

SewCalcs

Velcro Calculator — Hook & Loop Tape

Calculate hook-and-loop tape length for closures and fastenings.

Closure Length

Length of the opening the tape will span

Tape Width

Common widths: 1.6cm light, 2cm garments, 2.5cm+ bags (display only)

Number of Closures

How many separate closures need tape

TypeSew-on is most durable for washable garments

Tape Price (optional)

Per metre of paired tape

How We Calculate This

A hook-and-loop closure needs an equal length of hook tape and loop tape. For each closure the tape spans the opening, plus a little overlap, plus a fold-under at each end so the cut edges do not fray. UK haberdashers sell sew-on tape per metre with the hook and loop sides paired together, so the length you buy is the each-side figure.

The formula

Length per side = (Closure length + overlap + 2 × fold-under) × Number of closures

Buy this length of paired hook-and-loop tape (it includes both sides). The combined hook + loop figure only matters if you buy hook and loop on separate single-sided rolls.

Frequently Asked Questions

Related Calculators

Button Spacing Calculator

Calculate even button spacing and placement for garments.

Elastic Calculator

Calculate elastic length for waistbands, cuffs and casings.

Ribbon Calculator

Work out ribbon length needed for trims, bows and decoration.

Hook and Eye Calculator

Calculate hook and eye spacing and quantities for closures.

Snap Spacing Calculator

Calculate even snap placement and quantities.

Last updated: February 2026

All calculations are estimates. Always verify quantities before cutting or purchasing fabric.