Six free tools
Quilting calculators
Every measurement a quilt needs, worked out in plain numbers — binding, backing, batting, half-square triangles, strip sets, and the whole top. No sign-up, no app, and they remember nothing about you.
All six calculators
Binding
Enter your quilt size and binding width to get total binding length, WOF strips to cut, and yards of fabric — diagonal-seam allowance built in.
Open the calculator →BackingBacking Yardage
Get backing yardage for any quilt. It compares horizontal vs. vertical seams, picks the thriftier layout, and adds overhang for longarm or domestic quilting.
Open the calculator →HSTHalf-Square Triangle
Choose your finished HST size, how many you need, and the method (2-, 4-, or 8-at-a-time) to get the exact cut-square size, squares to cut, and trim-down size.
Open the calculator →Strip piecingStrip Piecing
Turn finished strip widths into cut widths (seam allowance added), see strips per width of fabric, and total yardage for jelly-roll and strip-set quilts.
Open the calculator →BattingBatting Size
Add the recommended quilting overhang to your top, then match it to the nearest standard packaged batting size — or get the yardage to buy off a wide roll.
Open the calculator →Whole quiltQuilt Fabric
A whole-quilt estimator: enter block layout, sashing, and borders to get finished dimensions plus yardage for blocks, sashing, borders, binding, and backing.
Open the calculator →No spreadsheet required
Stop redoing the math on the back of an envelope.
Six calculators, all the formulas explained, and a growing library of guides — free, forever, and they work on your phone at the fabric shop.
Open the calculators