Hi everyone,

i was wondering if there is computer software or a website that helps you with sizing patterns. For example, I came up with a sweater for a 12 month old, but would like to expand for newborn, 6 mos, 18 mos, etc. I suppose there is some magical math formula to do this, but I would have to think that there is software out there that does this for you.

Anyone know where I could find this?