Quilting calculators that show their math

Work out yardage and cut sizes in seconds, then see exactly how the number was reached, so you can trust it before you cut into fabric you love.

• Backing CalculatorYardage and seam layout for the back of your quilt.
• Binding CalculatorHow many strips to cut and how much fabric to buy.
• Half-Square Triangle CalculatorCut sizes for 2-, 4- and 8-at-a-time HSTs.
• Setting Triangle CalculatorSide and corner triangles for on-point layouts.
• Quilt Size CalculatorFinished quilt size for any bed, drop and pillow tuck.
• Border CalculatorStrip counts, cut lengths and yardage for one or more quilt borders.

Why another quilting calculator?

Most quilting math comes down to a few formulas: add seam allowances, multiply by 1.414 for anything on the diagonal, and round up to a size your ruler can cut. Every calculator here shows the formula and a worked example, uses fractions you can actually find on a ruler, and works on your phone at the cutting table.

Accept fractions the way you'd write them: 12 1/2, 12.5 and 12-1/2 all work. Results update as you type, and the address bar keeps your numbers so you can bookmark or share a calculation.