Sashing Calculator

Sashing that actually rescues a quilt

Sashing can save blocks that don't quite match. If your sampler blocks came out slightly different sizes, sashing hides the inconsistency better than setting blocks edge-to-edge where every mismatch shows. Cut your sashing strips to the size the blocks should be, then ease the blocks to fit — the sashing becomes the enforcer of your grid.

Cut all your sashing strips in one session. Even a tiny width variation compounds across a full quilt and throws off block alignment. Cornerstones need the same precision — cut them all at once from a squared-up strip. Press seams toward the sashing so the seams nest when you join rows.

Assembly order matters: sew sashing strips to blocks into rows first. Then sew cornerstones to horizontal sashing strips. Then join the rows. Pin at every intersection — the seams should nest if your pressing direction is consistent. Build the grid one row at a time and it comes together cleanly.