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Pillow Cover Calculator

Turn a pillow insert size into a cut list for an envelope-back cover.

The measured size of the pillow form you are covering, not the cover.

Ease makes the cover slightly larger than the insert so it fills out. The seam allowance is added on every cut edge. The two back panels overlap by the chosen amount, and each opening edge is turned under by the hem.

The finished cover is the insert plus the ease on both sides, and every panel adds the seam allowance to its edges. The back is cut as two rectangles the full width of the front: their combined height covers the front plus the overlap, and each gains the hem at its opening edge. The fabric length assumes all three panels fit across a single 44 in (112 cm) width and are stacked along the bolt. It does not allow for a directional print, nap, pattern matching or squaring the fabric. Everything is worked out in your browser; nothing is sent or stored.