How to calculate it
Columns = ceil(desired width ÷ finished square size); rows = ceil(desired length ÷ finished square size). Multiply columns by rows for square count. The grid dimensions are columns and rows times square size.
Worked example
A 48 × 60 in blanket using 6 in finished squares needs 8 columns × 10 rows, or 80 squares, before any separate border.
Before you cut or buy
- Use the measured size after blocking and joining, not the size of an unfinished square.
- A join or border may add width; estimate its contribution separately before deciding final dimensions.
Common questions
Do joins count toward the finished blanket size?
The result treats the entered square size as the finished contribution of each joined square. If joining adds measurable width, include that in your square measurement or adjust the final target.
What if the desired dimensions do not divide evenly by square size?
The grid rounds rows and columns upward to whole squares. The displayed assembled dimensions show how much larger than your target the grid may become.
Use your own measured materials and pattern instructions. Estimates cannot account for every variation in technique, shrinkage or layout.