Instarsia C2C Calculator
Below is a super cool tool for all you crocheters out there.
On my charts, I include the number of squares that each colour makes up of the chart.
You can use that number to estimate how much of each yarn you will need to make a corner to corner blanket of your chart.
HOW TO USE
Select the yarn weight you would like to use to make your C2C blanket from the dropdown and then enter the number you see in the first shade square at the bottom of your chart. The yarn estimate will be calculated automatically. Work your way across all the shades listed on your chart making a note of the amounts as you go.
Please note that these are estimates using my tension.
If you know you are a loose crocheter you will need more yarn than that estimated.