Free Crafts & Sewing Calculators
These tools are for knitters, sewists, candle and soap makers, leatherworkers and other makers who buy materials by the yard, gram or skein. Enter your project details and get the amount to buy or cut. Everything runs in your browser and nothing is uploaded.
Featured Crafts & Sewing tools
- Yarn Yardage CalculatorTurns pattern yardage and ball length into balls to buy, with a stash checker.
- Soap Making Lye CalculatorReturns the exact NaOH or KOH amount and water for your oils and superfat.
- Candle Wick Size GuideCompares wick families side by side for your jar diameter and wax type.
- Quilting Fabric Cut CalculatorGives exact yardage from a cut size and draws the cutting layout.
Knitting & Yarn
4 toolsYardage, gauge changes, row tracking and raw fleece yield.
- Knitters / Crocheters
Yarn Yardage Calculator
Enter pattern yardage and yarn ball length to get balls needed. Size scaling table, stash checker, cost estimate.
- Knitters / Crocheters
Knitting Row Counter
Build named sections with their own counters, progress bars, and notes. Saves projects to your browser.
- Knitters / Garment Designers
Knitting Pattern Repeat Calculator
Enter original and new gauge with pattern repeat to get the new stitch count rounded to the nearest correct multiple.
- Handspinners & Fibre Artists
Raw Fleece Scouring Yield Calculator
Calculate scoured clean weight, washing detergent amounts, and expected yarn yardage from raw greasy fleece. Enter breed and weight to get exact yield.
Sewing & Textiles
4 toolsPattern grading, needles and thread, fabric cuts and yarn count conversion.
- Sewers / Garment Makers
Sewing Pattern Grading Calculator
Enter original and target measurements to get total grade and per-seam adjustment for each key measurement point. cm and inches.
- Sewers / Garment Makers
Sewing Needle & Thread Guide
Select fabric type, weight, and machine to get recommended needle size, point type, thread weight, and stitch length.
- Quilters
Quilting Fabric Cut Calculator
Enter cut size, fabric width, and pieces needed to get exact yardage, a live cutting layout diagram, and a shopping card for the fabric store.
- Textile Industry / Fashion Designers
Textile Denier & Thread Count Converter
Convert between denier, tex, dtex, metric count (Nm), and English cotton count (Ne). Fabric GSM estimator from thread count and yarn weight.
Embroidery & Screen Printing
3 toolsStitch files, thread quantities and ink amounts.
- Embroidery
EPS to DST Converter
Convert vector EPS artwork into Tajima DST stitch files with automatic path tracing and density control. No software install.
- Hand & Machine Embroiderers
Embroidery Thread Yardage Calculator
Calculate exactly how many yards and DMC skeins you need for any embroidery design. Enter area, stitch type and colour count - get skein totals and cost.
- Screen Printers / Print Shops
Screen Printing Ink Estimator
Enter print area, colours, mesh count, and run quantity to get ink weight and cost per colour. Underbase white calculation.
Cord, Leather & Fly Tying
4 toolsCord lengths, hide usage and tying materials.
- Crafters / Outdoors
Paracord Length Calculator
Pick a weave (cobra, king cobra, fishtail, diamond) and finished length to get total cord needed with buffer. Bracelets, collars, lanyards.
- Macrame Crafters
Macrame Cord Length Calculator
Enter finished length, number of cords, and knot density to get the exact cut length per strand and total cord to buy.
- Leatherworkers
Leather Hide Square Footage Calculator
Enter hide size and cut type to get usable square footage, plus whether one hide covers your pattern pieces.
- Fly Tyers
Fly Tying Material Calculator
Pick a hook size, a fly style and how many you are tying to get thread yardage and spools to buy, dubbing in grams, hackle feathers needed, and ribbing length, with the wrap count behind every number.
Candles, Soap & Resin
4 toolsBatch weights and safe ratios for poured and cast projects.
- Crafters / Etsy Sellers
Candle Making Calculator
Enter jar size, batch count, and fragrance load to get exact wax, fragrance oil, and dye weights plus cost per candle.
- Candle Makers / Crafters
Candle Wick Size Guide
Enter jar diameter and wax type to get CD, ECO, Cotton Core, and Wood Wick recommendations side by side. Fragrance load adjustment, test protocol, wick log.
- Soapmakers
Soap Making Lye Calculator
Add oils, set superfat, and get exact NaOH or KOH amount and water. INS hardness value included. 16 oils.
- Crafters / Artists
Resin Art Volume Calculator
Enter mold shape and mix ratio to get exact Part A and Part B weights in grams and mL. Epoxy, polyester, UV resin.
Jewelry & Body Art
3 toolsMarks, sizes and stencils for jewelry and tattoo work.
- Jewelry Buyers / Sellers
Jewelry Hallmark Decoder
Type a fineness mark (925, 750, 375, 585, 950) to get metal type, karat, purity percentage, and intrinsic metal value from spot price.
- Jewelry Buyers / E-commerce
Ring Size Converter
Enter any ring size - US, UK letter, EU numeric, Japanese, or finger circumference in mm - and get all other systems instantly. Printable ring sizer guide.
- Tattoo Artists
Tattoo Stencil Size Calculator
Upload a design, enter target dimensions in cm or inches, and print at true 1:1 physical size using the browser print API.
Which tool do I need?
- Work out how many balls of yarn to buyYarn Yardage Calculator
- Keep your place in a knitting patternKnitting Row Counter
- Change gauge and keep a pattern repeat intactKnitting Pattern Repeat Calculator
- Choose a needle and thread for a fabricSewing Needle & Thread Guide
- Grade a pattern to a new sizeSewing Pattern Grading Calculator
- Calculate fabric yardage for quilt piecesQuilting Fabric Cut Calculator
- Estimate embroidery thread and skeinsEmbroidery Thread Yardage Calculator
- Cut cord for a macrame or paracord projectMacrame Cord Length Calculator
- Weigh wax and fragrance oil for a batch of candlesCandle Making Calculator
- Find the lye amount for cold-process soapSoap Making Lye Calculator
- Mix resin in the right proportionsResin Art Volume Calculator
- Convert a ring size between countriesRing Size Converter
Crafts & Sewing FAQ
How much yarn do I need for a pattern?
Enter the pattern yardage and the length of one ball into the yarn yardage calculator. It returns the number of balls to buy, scales by size and checks your stash.
How do I calculate lye for cold-process soap?
Add your oils and set the superfat in the soap lye calculator. It returns the exact NaOH or KOH amount and the water, and includes the INS hardness value for 16 oils. Handle lye with the safety precautions your recipe specifies.
How do I choose a candle wick size?
Enter the jar diameter and wax type in the candle wick guide. It shows CD, ECO, Cotton Core and Wood Wick recommendations side by side, with a fragrance load adjustment and a test protocol.
How do I change gauge without breaking a knitting pattern repeat?
Enter the original and new gauge with the pattern repeat into the knitting repeat calculator. It returns the new stitch count rounded to the nearest correct multiple.
How much cord does a macrame project need?
Enter the finished length, the number of cords and the knot density. The macrame cord length calculator returns the cut length per strand and the total cord to buy.
Are these tools free?
Yes. Every calculator is free, needs no account and runs in your browser.
Related categories
Last updated: September 30, 2026