Hexagon Quilt Calculator

First, divide your quilt width by (hexagon size × 1.732) and round up to get the number of columns. Then use the formula (2L − d) / (3d) to find the number of rows, rounding up to the nearest odd number. Finally, apply the hexagon count formula: ((rows/2 + 0.5) × columns) + ((rows/2 − 0.5) × (columns − 1)). This calculator handles all of that for you automatically.

Hexagon size refers to the finished side length of one hexagon after the seam allowance has been folded or sewn. A 1" hexagon has six sides each measuring 1 inch. When you purchase English paper piecing templates or pre-cut papers, the size listed is typically this finished measurement.

When a hexagon quilt layout has staggered columns, the edges of the quilt end up with half-hexagon shaped gaps. To create a straight edge on your quilt, you either fill those gaps with half hexagons or trim the full hexagons along the edge. The number of half hexagons is calculated as (rows/2 − 0.5) × 2.

Using the standard formulas: columns = ceil(90 / (4 × 1.732)) = 13, rows = the nearest odd number from (2×90 − 4)/(3×4) = 14.67, rounded up to 15. Total hexagons ≈ (8 × 13) + (7 × 12) = 188. The exact count may vary slightly based on rounding — this calculator will give you the precise figure.

Not exactly, because hexagons must be arranged in whole-number columns and rows. The calculator rounds up to the nearest whole column and the nearest odd row count, then computes the actual finished dimensions from those rounded values. Your real quilt will be close to, but may be slightly larger than, your target size.

Yes — hexagons come in many sizes, from tiny ¼" papers used in intricate miniature quilts all the way up to 6" or larger for a bold modern look. Smaller hexagons require far more pieces and stitching time, while larger hexagons work up quickly. Enter any decimal value (e.g. 0.5, 1.5, 2.25) for your hexagon size.

The most common method is English Paper Piecing (EPP): wrap fabric around a paper hexagon template, baste it in place, then whipstitch adjacent hexagons together by hand. Once all hexagons are joined, remove the paper templates and press the quilt. Machine-piecing hexagons is also possible using Y-seams. Many quilters sew in rows first, then join rows together.

The fabric needed depends on your total hexagon count and the size of each piece. For each hexagon, you typically cut a fabric piece approximately (hexagon size + seam allowance) across. A rough rule of thumb is to add ¼" to ½" seam allowance on each side. For an exact fabric estimate, multiply the number of hexagons of each fabric by the area of one fabric piece, then add 10–15% for waste.