Papercraft Calculators & Tools
Free, practical calculators for working with paper — convert paper weights, cut clean origami squares, size cards and their envelopes, estimate a project’s paper, plan a booklet, and measure quilling strips.
Paper Weight Converter
Convert paper weight between gsm and pounds for any grade — bond, text, cover, index — and see the same sheet expressed as a basis weight across every grade.
Origami Square & Size Calculator
Cut the largest square from A4, Letter, or any rectangle, read its diagonal, and plan a model's finished size up or down before you fold.
Card & Envelope Size Calculator
Match a handmade card to the envelope it needs, get the flat blank and score line to cut, and find the nearest standard A-line envelope.
Paper Quantity Calculator
Work out how many pieces cut from each parent sheet and how many sheets a whole project takes, with a waste allowance built in.
Booklet Signature & Imposition Calculator
Plan a saddle-stitched booklet or zine — pages padded to a multiple of four, folded sheet count, and which page numbers print on each sheet.
Quilling Strip Length Calculator
Convert a quilling strip length to its finished coil diameter and turns, or work backward from a target diameter to the strip you need.