Free Online Knitting Calculators

Free Online Knitting Calculators

Have you ever wanted to know how much yarn you need to knit a project?  How many stitches to cast on for a knitted project.

Knitting calculators are some of the most sought-after resources by knitters.  These calculators make knitting math easy because you do not have to calculate anything yourself.

Below is a round-up of free online knitting calculators.  These calculators can be very useful:

  • Knitting Yarn Calculator
  • Knitting Yardage Calculator
  • Hat Calculator
  • Substituting Yarn Calculator
  • Yards and Meters Conversion Calculator
  • Knitting Gauge Calculator
  • Sock Calculator
  • And More

Don’t forget to bookmark or pin this page because you never know when you may need a knitting calculator.

These knitting calculators are provided free by various websites.  If you have any questions on how to use the calculators, please contact the person in charge of the website. 

We have many other helpful calculators like these such as our Cross Stitch Calculators or Beadwork Calculators.  

Supporting Products and links: Some of the links below may be affiliate links. We make a small commission on sales through the affiliate links, at no extra cost to you. Thank you in advance for your purchase and your support! Please see our full Affiliate Statement for more information.


This is a knitting calculator for set in sleeves. French Roast Design

Calculate chart/project size

The size of your finished object depends on your yarn, needles and tension. This guide helps you to calculate the size of your finished object. Stitch Fiddle

Free Yarn Yardage Calculator

Calculate the yardage needed to complete crochet or knit projects. Cozy Nooks Designs

Handy Knitting Calculators and Charts

Calculators and charts to convert between yards and metres, or if you're substituting yarn, calculate how much yarn you'll need for a project! Love Crafts

Hat Calculator

Super Simple Circular Hat Calculator Earth Guild

How To Calculate Yardage of Partial Skein

Calculate how much yardage is remaining on a partial skein of yarn. Through the Loop

Interactive Sock Calculator

The sock calculator will help you calculate all of the stitches you need to knit a sock. Good Night Kisses


Use this calculator to customize your raglan pullover pattern. Kniterator

Knitting Calculator

Knitting Calculator

This knitting calculator will help you estimates the total yarn need to knit a project. The calculator will help you figure out how much yarn is needed to knit socks, sweaters, hats, blankets, and more! Jimmy Beans

Knitting Calculators

How many stitches should I cast on for a baby blanket? What is the number of rows to loom knit a man’s scarf? How much yarn will I need to knit a queen size blanket? The Interactive Knitting Calculators are here to help! Good Knit Kisses

Knitting Gauge Calculator

This calculator will help you calculate stitches and rows when your gauge differs from the gauge specified on the pattern. Brenda A Bell Blog

Knitting Increase and Decrease Calculators

Use the calculators below to determine how to increase or decrease evenly across your row or round of knitting. World Knits

Knitting tools for double rake knitting

Several calculators to aid in double rake knitting projects. Rake Knitting

Online Stitch Multiple Calculator

This online calculator will help you figure out how many stitches you’ll need to get a particular width while matching a stitch multiple. Edie Eckman

Sock Calculator

Print customized instructions for knitting socks. Liz's Personal Page

Sock Calculator

A sock calculator for hand or machine knitting. Liz's Personal Page

Ten Stitch Calculator

With a couple measurements from your swatch this two-way calculator can tell you how many rounds* to knit to reach the size you want or you can tell it how many rounds you want to knit and it will give you the finished size. This just the tool you need so you can design just the right layout for your blanket. Good Knit Kisses

Triangular Shawl Calculator

Here’s a little way to calculate the maximum number of rows you can work on a shawl (top down shawls only). Colourful Designs

Yarn Calculators

Click for gauge calculators, increase and decrease calculators or calculate how long it will take to crochet a project. Joy of Motion Crochet

Yarn Substitution Calculator for Projects

This calculator will help you figure out how much yarn is needed for your project when switching yarn types. The Crochet Crowd

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