Creating graphghan pattern from a picture

[ninjapanda]

I want to attempt making my own graphghan from a picture but I'm having trouble finding a program that will work for me. I tried stitch wizard but they only graph out patterns that go up to a certain size. I want to make a blanket big enough for a twin or double bed though and using sc and the yarn I wanted to use, the large size on stitch wizard doesn't go large enough. Maybe I'm doing something wrong, I'm new to this.... I don't know. Any help or program suggestions would be greatly appreciated.

[Granny Square]

Try this program http://www.microrevolt.org/knitPro/

Choose the XL size and the 1:1 ratio.  Here's a list of mattress sizes http://www.quiltmaker.com/quilt-measurements-common-and-standard-bed-sizes

Do a swatch to get your stitch gauge, example the biggest graph is 120 stitches wide - do a swatch say 20 stitches wide, and your pic will be 6x that size.  I don't think you are going to find something that will get you the fill width of a mattress top, but you can put the graphed pic in the center of a bigger plot with wide borders.  Example, if your gauge is 4 stitches per inch (not unreasonable), 120/4 is 30"; a twin mattress is 39 inches wide.  You don't want the pic spilling over the sides, you'd want it just at the top of the bed, so that would be perfect.  And usually, a design on a bedspread would be centered left and right, and centered top to bottom of the area between the bottom of the pillow to the foot of the bed.

 

[Granny Square]

PS forgot to say welcome to the 'ville!

[ninjapanda]

Thanks! That's really helpful! ^.^