Quilting how-to guides

Every guide has a simulation: change the size, press play, and watch the maths happen before you cut a single piece of fabric.

• Interactive How to calculate quilt backing Drag the quilt size and see the panels, the seams and the yardage change.
• Interactive How to calculate and make quilt binding Watch the strips get cut, joined at 45° and sewn around your quilt.
• Interactive How to make half-square triangles Pick a finished size and method: the cut size and every step, animated.
• Interactive What size quilt for a bed? Choose a mattress, a drop and a pillow tuck and see the quilt fall over the bed.
• Interactive How many squares from a fat quarter? See exactly how a fat quarter cuts up, and how much is left over.
• Interactive How to set a quilt on point Turn blocks 45° and watch the side and corner triangles fill in.

Just want the number? The free calculators give the answer straight away, and how we calculate lists every formula and assumption.

Updated 2026-11-14.