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Seam Allowance Addition Planner
Add seam allowance on two opposing edges to determine cut dimension.
Enter your values
Your inputs are processed locally. Review the method and limitations before relying on the estimate.
Your result
How does Seam Allowance Addition Planner work?
Add seam allowance on two opposing edges to determine cut dimension.
Worked example
Example input: Finished desired dimension cm = 40; Seam allowance each side cm = 1.5. With all other prefilled inputs unchanged, cut size cm is approximately 43. Change any input to recalculate your own scenario.
Frequently asked questions
Does the calculator use real-time data?
No. All values come from your entries; no external price, weather or regulatory data is fetched.
Should I use this result without checking?
No. Confirm input measurements, local circumstances and any equipment or legal requirements first.