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 calculatorEstimate how much yarn your blanket will need using a sample made with the same yarn, hook and stitch pattern.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 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 sweater yarn from the body, sleeves and a swatch made with your chosen yarn and stitch pattern.Open calculatorHat yarn calculatorTurn a measured swatch into a practical yarn estimate for a fitted crochet or knitted hat.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 calculatorUse the yarn held together calculator as a focused planning tool with transparent inputs and results.Open calculatorRemaining yarn calculatorUse the remaining yarn calculator as a focused planning tool with transparent inputs and results.Open calculatorYarn cost calculatorUse the yarn cost calculator as a focused planning tool with transparent inputs and results.Open calculatorYarn by sample calculatorUse the yarn by sample calculator as a focused planning tool with transparent inputs and results.Open calculatorWPI calculatorUse the wpi calculator as a focused planning tool with transparent inputs and results.Open calculatorYarn stash sufficiency calculatorUse the yarn stash sufficiency calculator as a focused planning tool with transparent inputs and results.Open calculatorPick-up stitches calculatorUse the pick-up stitches calculator as a focused planning tool with transparent inputs and results.Open calculatorIncrease rate calculatorUse the increase rate calculator as a focused planning tool with transparent inputs and results.Open calculatorDecrease rate calculatorUse the decrease rate calculator as a focused planning tool with transparent inputs and results.Open calculatorSleeve decrease calculatorUse the sleeve decrease calculator as a focused planning tool with transparent inputs and results.Open calculatorRaglan increase plannerUse the raglan increase planner as a focused planning tool with transparent inputs and results.Open calculatorButtonhole spacing calculatorUse the buttonhole spacing calculator as a focused planning tool with transparent inputs and results.Open calculatorCrochet circle calculatorUse the crochet circle calculator as a focused planning tool with transparent inputs and results.Open calculatorCrochet oval calculatorUse the crochet oval calculator as a focused planning tool with transparent inputs and results.Open calculatorAmigurumi shape calculatorUse the amigurumi shape calculator as a focused planning tool with transparent inputs and results.Open calculatorGranny square layout plannerUse the granny square layout planner as a focused planning tool with transparent inputs and results.Open calculatorCrochet border calculatorUse the crochet border calculator as a focused planning tool with transparent inputs and results.Open calculatorCrochet stitch height calculatorUse the crochet stitch height calculator as a focused planning tool with transparent inputs and results.Open calculatorC2C calculatorUse the c2c calculator as a focused planning tool with transparent inputs and results.Open calculatorCircle-to-square calculatorUse the circle-to-square calculator as a focused planning tool with transparent inputs and results.Open calculatorTurning chain calculatorUse the turning chain calculator as a focused planning tool with transparent inputs and results.Open calculatorBlanket project calculatorUse the blanket project calculator as a focused planning tool with transparent inputs and results.Open calculatorSweater project calculatorUse the sweater project calculator as a focused planning tool with transparent inputs and results.Open calculatorHat project calculatorUse the hat project calculator as a focused planning tool with transparent inputs and results.Open calculatorSock calculatorUse the sock calculator as a focused planning tool with transparent inputs and results.Open calculatorGranny square blanket calculatorUse the granny square blanket calculator as a focused planning tool with transparent inputs and results.Open calculatorTemperature blanket calculatorUse the temperature blanket calculator as a focused planning tool with transparent inputs and results.Open calculatorAmigurumi project calculatorUse the amigurumi project calculator as a focused planning tool with transparent inputs and results.Open calculatorProject time calculatorUse the project time calculator as a focused planning tool with transparent inputs and results.Open calculatorProject finish date calculatorUse the project finish date calculator as a focused planning tool with transparent inputs and results.Open calculatorRows per day calculatorUse the rows per day calculator as a focused planning tool with transparent inputs and results.Open calculatorHourly rate calculatorUse the hourly rate calculator as a focused planning tool with transparent inputs and results.Open calculatorProfit margin calculatorUse the profit margin calculator as a focused planning tool with transparent inputs and results.Open calculatorMarketplace fee calculatorUse the marketplace fee calculator as a focused planning tool with transparent inputs and results.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