What is the four-at-a-time QST method?
Cut two squares, draw two diagonal lines, sew on both lines, cut along both lines to get four QSTs.
Free quilting calculator
Quarter-Square Triangle Calculator
Quarter-square triangles are used in many quilt blocks including Ohio Star and Carpenter's Wheel. This calculator helps with cutting sizes and yardage.
Result
QST cutting estimate
Cut 12 squares at 5.25" to make 24 QSTs.
- Finished QST size
- 4"
- Cut square size
- 5.25"
- Squares to cut
- 12
- Pairs per row (WOF)
- 8
- Rows needed
- 2
- Estimated yardage
- 0.375 yards
Four-at-a-time method: cut two squares, draw two diagonal lines, sew on lines, cut along both lines for four QSTs.
Formula
Cut square size = finished QST size + 1.25 inches for 4-at-a-time method. For 8-at-a-time, use 2 × finished size + 1.25 inches.
Example calculation
For a 4 inch finished QST, cut squares at 5.25 inches for the 4-at-a-time method.
Results are planning estimates. Always round up when buying fabric, especially for directional prints, shrinkage, fussy cutting, or cutting mistakes.
Related calculators
Half-Square Triangle CalculatorCalculate HST cutting sizes and yardage for the two-at-a-time method or traditional method. Enter finished size and block count.Flying Geese CalculatorCalculate sky square and geese rectangle cutting sizes plus fabric yardage for flying geese quilt blocks.Quilt Block CalculatorCalculate how many quilt blocks you need based on finished quilt size, block size, sashing, and borders.
Frequently asked questions
What is the eight-at-a-time QST method?
Cut two larger squares, stack them, sew around all four sides, cut diagonally twice in each direction for eight QSTs.
Should I trim QSTs after sewing?
Yes. Trim to exact finished size for accurate piecing and sharp points.
What seam allowance is used?
A standard ¼ inch seam allowance is used in all calculations.