Skip to Content

C2C Interactive Crochet Calculators

C2C Interactive Crochet Calculators

C2C Interactive Crochet Calculators

C2C afghans and graphghans are wildly popular and with good reason.  It’s a great technique that looks difficult, but is actually simple.  If you want to follow an existing chart, but don’t have the same yarn or want to change the size you need to know how big your finished project will be.  That’s what the C2C Interactive Crochet Calculators are all about!

There’s two calculators: one to tell you the finished size of specific graph and the other to tell you how many squares you need reach a certain size.  That second is just what you need if you want to make your own graph to crochet!

But before you use the calculator you need to make a swatch.  Yeah, I know nobody likes swatches, but in this case a few minutes of time can save you loads of headaches later.  Check out Kristen’s How to Crochet Corner to Corner lesson if you need to learn the basics first.

All you need is a basic 5 x 5 swatch.  Here’s mine:

C2C Interactive Crochet Calculators Swatch Image

Although it’s a square you crochet a C2C on the diagonal.  Looking at the C2C Basic Square below I rotated the swatch so you can see how it looks as you are working on it.

I started at the bottom and worked each row back and forth.  For the first half I increased at the beginning of every row until I reached the halfway point.  Then I decreased at the beginning of every row until I reached the opposite corner.

C2C Interactive Crochet Calculators Swatch with grid overlay

The following diagram shows you exactly how the square is constructed using the same perspective.

C2C Interactive Crochet Calculators Swatch Increase Decrease Chart

Download fully notated charts for both right and left handed crocheters that even show the direction you’re working:
Right-handed Swatch Chart

Left-handed Swatch Chart


C2C Corner to Corner Interactive Crochet Calculators PIN Image

C2C Interactive Crochet Calculators

Corner to Corner afghans and graphghans are wildly popular and with good reason!   They are a simple way to turn any picture graph into an afghan.  Their unique corner to corner, or c2c as it’s commonly abbreviated, construction makes them a fun, easy project.  I’ve developed this C2C Interactive Crochet Calculator to help you plan your next project.

Make a 5 x 5 swatch with the yarn and hook you plan to use for your project and the calculators will do the rest.

1.How many squares in my graphghan?

The first calculator will need your swatch information and how large you want your finished afghan to be.  Then it will tell you how many squares across and down you will need to crochet to reach your desired size.  That’s just what you need to know to make a custom C2C graphghan!

2. How big will my graphghan end up?

The second calculator is designed to help you predict the finished size of your project if you already have the graph you want to use.  Enter the measurements of your swatch and how many squares across and down are shown on your graph and the calculator will tell you how big the finished project will end up.  Isn’t it better to know if your lap blanket is going to end up big enough to be a bedspread before you get half way through?

Watch the video below to see how to use the C2C Interactive Crochet Calculators!


Thursday 7th of December 2023

I cant see the calculator. I’m on an iPad and have used Safari, Chrome, and Pinterest. I cant see the calculators in any of these.

Alana Adams

Saturday 4th of February 2023

This has been most helpful.

Thank you

Michele Brower

Friday 30th of September 2022

I'm thoroughly confused but I really want to learn


Friday 2nd of September 2022

You're an excellent teacher and your beginner videos absolutely saved crochet for me!

Angel Faye Webb

Monday 27th of July 2020

I don't understand the calculator. Can it be used to determine a place mat design?.