Pack Bench cut list & spec

Backpack designer

Draw the bag. Get the cut list.

A pack is five flat panels, some webbing and a handful of buckles. Set the box you want and this bench works the rest out — every panel at its cut size with seam allowance, how it nests on a roll of fabric, what the whole thing will weigh before you thread a machine, and the order to sew it in.

Seam allow.
12 mm on every seamed edge
Roll width
150 cm
Units
centimetres, grams, litres
Assumes
a domestic machine, size 100 needle, bonded nylon thread

Your design lives in this browser and in the address bar — the link above carries the whole thing, and nothing is sent anywhere.

Specification

rev A
Start from
Dimensions
30 cm
20 cm
48 cm
18 cm rolls down three turns — half of it counts as capacity
Closure

Materials

Colourway
Body
Base
Webbing
Hardware
Pockets
Harness & fittings

Specification sheet

Field Rolltop

Cut list

Every piece at its cut size — finished dimension plus 12 mm seam allowance on each seamed edge. Cut with a hot knife or seal the edges; woven nylon frays from the moment you look at it.

PieceMaterialCut size QtyArea

Nesting layout

The same pieces laid on the roll, shortest side to the selvedge, packed in shelves. Buy the length at the bottom of the drawing and you have the pack with a little over.

Webbing & tape

RunWidthLength

Hardware

ItemQtyEach

Weight empty, estimated

Fabric area times its weight per square metre, plus the tape, the buckles and the foam. Real packs land a little over this — binding, bartacks and thread all count.

    Build order

    Sew it in this order and every seam stays reachable. Get it wrong and you will be stitching the last one from inside a finished bag.

      Where the load actually goes

      Take it to the workshop

      Install Pack Bench

      Add it to your home screen or dock and it runs like any other app — its own window, its own icon, no browser chrome. Every design you make is stored on the device, so it opens and works with no connection at all: on a train, in a fabric shop, or at a bench with no signal.

      iPhone & iPad

      1. Open this page in Safari.
      2. Tap the Share button.
      3. Choose Add to Home Screen.

      Android

      1. Open this page in Chrome.
      2. Tap Install above, or the ⋮ menu.
      3. Choose Install app.

      Mac & Windows

      1. Open in Chrome or Edge.
      2. Click Install above, or the icon in the address bar.
      3. It lands in your dock or Start menu.

      Also on this bench

      The Knitting Studio A free course in hand knitting — diagrams, stitch charts and a full stitch library. The Model Railway Handbook Choosing a scale, laying track that actually runs, wiring, stock and scenery. Cook Without a Recipe Five dials, a heat ladder drawn to scale, and salt and ratio calculators.