CraftCalc

no accounts · no email gates · arithmetic shown

The craft calculator that gives you the number, not a blog post.

Every tool here answers one question — how much material do I need, and what size do I make it? — above the fold, in your units, with the formula expanded using your own numbers. Then it hands you a result card you can print and take to the cutting table, the bench, or the yarn shelf.

Browse the calculatorsStart with ring sizing — 6,600 makers search it monthly

Fourteen calculators, one workshop

Each calculator is a free, standalone page: sensible defaults so you see a real result before typing anything, metric/imperial handling that converts properly (including the fractional inches quilters actually cut in), saved presets in your browser, and a shopping list of exactly what to buy.

Jewellery & wire

01Ring size calculatorString or an existing ring → US, UK, EU & JP size.

Quilting

01Quilt binding calculatorBinding length, strips to cut and fabric, with corner allowance.02Half square triangle calculatorFinished HST size → starting square cut size, seam allowance included.

Sewing & fabric

01Fabric yardage calculatorPiece size × quantity → yards to buy, with layout and shrinkage.

Candle making

01Candle wax calculatorVessel volume × count → wax weight and fragrance-oil load.

Resin

01Resin calculatorMould volume → total resin and the A/B split.

Knitting

01Yarn calculatorProject size + gauge → yardage and skeins, rounded up.02Knitting gauge calculatorSwatch counts → gauge, needle change, cast-on for a width.03Knitting decrease calculatorShape evenly: which rows get the decreases, row by row.04Stitch counter onlineTap-to-count rows and stitches; remembers where you left off.

Crochet

01Crochet gauge calculatorSwatch counts → gauge, hook change, starting chain for a width.02Crochet blanket size calculatorTarget size + gauge → starting chain, rows and yarn.03Skein calculatorTotal yardage ÷ yards per skein, rounded up.

Soap making

01Soap recipe calculatorOil weights → lye via SAP values, superfat and water.

Reference charts

The lookup tables makers keep bookmarked — rendered in the page itself, searchable, and printable. No PDF paywalls.

01Dmc thread color chartDMC floss numbers, names and hex — searchable and printable.02Anchor to dmc conversionAnchor ↔ DMC thread equivalents, both directions.03Jewelry wire gauge chartAWG ↔ mm ↔ inch, with typical jewellery uses.

Planning a cross stitch from a photo or a chart of your own? Our sister tool PatternGrid turns any image into a printable cross stitch pattern with a DMC floss key built in.

Why makers keep these tabs open

The arithmetic, expanded

Every result shows the formula with your numbers substituted — “4.2 skeins → buy 5” — so you can check the work and adjust one input with confidence.

Units that behave

Quilting in fractional inches to the ⅛″, wax and resin in grams or ounces, ring sizing in millimetres or inches. The toggle converts your inputs, not just the answer.

A card for the bench

One click prints a clean result card: inputs, result, formula and shopping list. It is the number you came for, in a form you can carry to the shelf.

Everything is free and runs entirely in your browser — saved presets and stitch counts live in localStorage on your device, never on a server. Formulas and standard tables (ring sizing, SAP values, wire gauge) are documented in the methodology, because a calculator you cannot check is worse than no calculator at all.