New to Piecing: Need Help with math
I am creating a quilt for my father's 90th birthday. I have a 10.5" center square. I want to surround it with a 10.5" square cut from 3 strips of different fabrics. Can someone please help me with the measurements of each strip width?? Is there some kind of calculator or website or?? that would help me with this?? I hope this makes sense!!! Thanks sew much for your assistance.
If I need to change the size of my center square that is also totally do-able.