Half Square Triangle (HST) Calculator
Calculate starting square size and fabric needed for half square triangles.
HST Specifications
Size when sewn into quilt
HST Method Reference
| Method | Formula | HSTs Made | Best For |
|---|---|---|---|
| 2-at-a-time | Finished + 7/8" | 2 | Small batches |
| 4-at-a-time | (Finished × 2) + 1.25" | 4 | Medium batches |
| 8-at-a-time | (Finished × 2) + 1" | 8 | Large batches |
HST Tips
- • Cut slightly larger and trim to perfect size
- • Press seams to the darker fabric
- • Use a square ruler with diagonal line for trimming
- • Chain piece for efficiency
- • Make a few extras in case of mistakes
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