60+ free tools for makers
Crochet math, without the math.
60+ free crochet & knitting calculators for yarn, gauge, sizing, stitches, costs and project planning.
Calculate for free, download a clean PDF summary, and use practical guides when you need more context.
60+ Free CalculatorsFree PDF DownloadsPro Project PlansPractical Guides
How it works
From one answer to a whole project
- 01
Calculate
Use any focused calculator for free and get the complete answer.
- 02
Save
Download a clean calculation PDF for free, with no signup.
- 03
Learn
Use practical guides to understand the choices behind the numbers.
StitchTip toolbox
Popular tools
Choose a focused calculator for yarn, skeins, stitches, gauge or substitution.
Skein calculatorTurn the yarn length in your pattern into a practical number of skeins, with an optional margin for swatching and small variations.Open calculatorCrochet blanket yarn calculatorStart with a quick range based on blanket size and yarn weight, or use a measured sample for a more accurate estimate.Open calculatorYarn calculatorScale the yarn used by a measured sample to estimate yarn length and skeins for a rectangular project.Open calculatorCrochet stitch calculatorTurn your measured stitch gauge into a practical starting stitch count for the width you want to make.Open calculatorCrochet gauge calculatorConvert the stitches and rows in your sample into consistent metric and imperial gauge measurements.Open calculatorYarn substitution calculatorCompare yarn lengths and find the number of replacement skeins needed for a pattern.Open calculatorRow calculatorTurn a measured row gauge into the practical number of rows needed for your project height.Open calculatorFinished size calculatorEstimate the finished dimensions of a piece from its stitch and row counts and your measured gauge.Open calculatorPattern repeat calculatorAdjust a target stitch count to the nearest number that fits complete pattern repeats and edge stitches.Open calculatorGranny square calculatorPlan the number and orientation of granny squares needed for a blanket, panel or other rectangular layout.Open calculatorYarn length converterConvert yarn labels and pattern requirements between meters and yards.Open calculatorYarn weight converterConvert yarn and project weights between grams and ounces.Open calculatorSweater yarn calculatorEstimate yarn for a sweater, cardigan or vest with separate body, tapered-sleeve and finishing calculations.Open calculatorHat yarn calculatorEstimate crochet or knitting yarn for a fitted hat with the crown and folded brim calculated separately.Open calculatorPattern resizing calculatorScale a rectangular pattern to new dimensions while keeping stitch counts compatible with your repeat.Open calculatorProject cost calculatorAdd yarn, supplies, working time and overhead to understand what a handmade project actually costs.Open calculatorHandmade price calculatorBuild a selling price that covers materials, paid working time, overhead and your target profit margin.Open calculatorGauge adjustment calculatorAdjust pattern stitch and row counts when your measured gauge differs from the original.Open calculatorCast-on calculatorCalculate a cast-on count from gauge, finished width and stitch repeat.Open calculatorFoundation chain calculatorCalculate a crochet foundation chain from gauge, target width and repeat.Open calculatorEven increase calculatorDistribute stitch increases evenly across rows, rounds or sections.Open calculatorEven decrease calculatorDistribute stitch decreases evenly across rows, rounds or sections.Open calculatorSleeve taper calculatorPlan sleeve decreases between cuff and upper arm over the available rows.Open calculatorRaglan increase calculatorPlan paired raglan increases across the available yoke rows.Open calculatorBaby blanket yarn calculatorEstimate yarn for a baby blanket from finished size and measured swatch consumption.Open calculatorScarf yarn calculatorEstimate yarn for a scarf from its width, length and swatch consumption.Open calculatorShawl yarn calculatorEstimate yarn for a shawl from planned dimensions and swatch consumption.Open calculatorYarn held together calculatorCombine two yarns from the length and net weight printed on each label, then compare their exact combined linear density and equivalent put-up.Open calculatorRemaining yarn calculatorEstimate usable yarn left either from a known amount used or by weighing a partial ball against its original label length and weight.Open calculatorYarn cost calculatorConvert the yarn units a project needs into complete store packs, actual checkout spend, effective unit cost and the value left in your stash.Open calculatorYarn by sample calculatorUse the yarn by sample calculator to turn your own measurements into a clear, editable result.Open calculatorWPI calculatorCalculate wraps per inch from a longer measured section and compare the result with every matching Craft Yarn Council weight range.Open calculatorYarn stash sufficiency calculatorCompare matching yarn already in your stash with a project estimate plus safety allowance, then calculate complete extra skeins only when needed.Open calculatorPick-up stitches calculatorTurn a blocked edge, its available row ends or stitches and the band gauge into a repeat-compatible pickup count with an even marker plan.Open calculatorIncrease rate calculatorUse the increase rate calculator to turn your own measurements into a clear, editable result.Open calculatorDecrease rate calculatorUse the decrease rate calculator to turn your own measurements into a clear, editable result.Open calculatorSleeve decrease calculatorTurn starting stitches, target stitches and sleeve rows into a checked decrease schedule with an exact first shaping row.Open calculatorRaglan increase plannerCheck a raglan yoke from its exact first increase row through the target stitch count and final scheduled row.Open calculatorButtonhole spacing calculatorTurn a blocked button band, vertical gauge and real button dimensions into evenly spaced positions aligned to whole rows.Open calculatorCrochet circle calculatorTurn a blocked diameter and measured gauge into a flat-circle plan with a final edge count and target for every round.Open calculatorCrochet oval calculatorPlan a chain-based crochet oval from blocked length, width and gauge, including the center chain and every round target.Open calculatorAmigurumi shape calculatorBuild a symmetric amigurumi sphere or capsule from finished diameter, height and measured round gauge.Open calculatorGranny square layout plannerCompare both orientations of a blocked motif and plan the whole-piece grid, finished dimensions and joining workload.Open calculatorCrochet border calculatorPlan a rectangular crochet border with different pickup rates for stitch and row edges, repeat fitting, corners and a complete setup-round total.Open calculatorCrochet stitch height calculatorTurn the measured height of several complete crochet rows into one-row height, standard row gauge and practical whole-row options for a target project length.Open calculatorC2C calculatorTurn a measured corner-to-corner block into a rectangular grid, complete diagonal row sequence and sample-based yarn estimate.Open calculatorCircle-to-square calculatorTurn a measured flat crochet circle into a symmetric square with four equal sectors, corner increases and a target for every transition round.Open calculatorTurning chain calculatorChoose a crochet stitch and edge convention to calculate the turning-chain height, complete foundation chain and exact first-stitch placement.Open calculatorBlanket project calculatorUse the blanket project calculator to turn your own measurements into a clear, editable result.Open calculatorSweater project calculatorEstimate sweater yarn from finished body measurements, tapered sleeve dimensions, finishing allowance and a measured swatch.Open calculatorHat project calculatorEstimate hat yarn from the straight section, reduced crown area, folded brim and a measured swatch.Open calculatorSock calculatorTurn a blocked sock gauge and finished foot measurements into a cast-on, heel allocation and round-by-round foot and toe plan.Open calculatorGranny square blanket calculatorCompare both orientations of a blocked motif and plan the whole-piece grid, finished dimensions and joining workload.Open calculatorTemperature blanket calculatorPlan a temperature blanket from calendar length, rows per day, measured yarn use and your expected distribution across five color bands.Open calculatorAmigurumi project calculatorEstimate amigurumi yarn from the total pattern stitch count and yarn measured across a representative group of stitches.Open calculatorProject time calculatorEstimate total craft time, remaining work, daily pace and a realistic finish date from one timed section.Open calculatorProject finish date calculatorUse the project finish date calculator to turn your own measurements into a clear, editable result.Open calculatorRows per day calculatorUse the rows per day calculator to turn your own measurements into a clear, editable result.Open calculatorHourly rate calculatorTurn desired owner pay, business overhead, reserve and realistic billable hours into a sustainable handmade hourly rate.Open calculatorProfit margin calculatorSee actual profit after discount, labor, materials, overhead and selling fees, then calculate break-even and target-margin list prices.Open calculatorMarketplace fee calculatorSee platform fees, payment fees, product costs, packaging, seller-paid shipping, break-even price and net profit in one calculation.Open calculator
Guides
Learn before you start
Short practical guides explain the choices behind the numbers.
Yarn / BlanketsHow Much Yarn Do I Need for a Blanket?The amount of yarn you need for a blanket depends on the finished size, yarn thickness, stitch pattern, hook or needle size, and your personal tension. That is why two blankets with the same dimensions can use noticeably different amounts of yarn.Read guideGaugeHow to Calculate Crochet Gauge — and What to Do When It Doesn't MatchCrochet gauge tells you how many stitches and rows fit into a given measurement. It is one of the most important numbers in a fitted project because it connects the written pattern to the physical size of your work.Read guideYarnHow to Substitute Yarn Without Ruining Your ProjectA good yarn substitution is not simply another skein with the same weight printed on the label. To preserve the size and behaviour of a project, compare yarn thickness, gauge, fibre characteristics and total length.Read guide