Quilt math quick answers

Exact, worked answers for the quilting math questions we're asked most. Each one shows the method and opens the matching calculator if your numbers are different.

Binding

How much binding for a baby quilt?
How much binding for a crib quilt?
How much binding for a throw quilt?
How much binding for a twin quilt?
How much binding for a full quilt?
How much binding for a queen quilt?
How much binding for a king quilt?
How much binding for a California king quilt?

Backing

How much backing fabric for a baby quilt?
How much backing fabric for a crib quilt?
How much backing fabric for a throw quilt?
How much backing fabric for a twin quilt?
How much backing fabric for a full quilt?
How much backing fabric for a queen quilt?
How much backing fabric for a king quilt?
How much backing fabric for a California king quilt?

Half-square triangles

What size to cut for 2 inch half-square triangles?
What size to cut for 2 1/2 inch half-square triangles?
What size to cut for 3 inch half-square triangles?
What size to cut for 3 1/2 inch half-square triangles?
What size to cut for 4 inch half-square triangles?
What size to cut for 5 inch half-square triangles?
What size to cut for 6 inch half-square triangles?

Planning the whole quilt? The Quilt Planner has a backing and binding worksheet, fabric requirements and a cutting chart for every project.