State end-cut angles relative to square before calculating blanks.
Is a supplied angle measured from a square end or from the board edge?
Use the matching calculator
Use this decision sequence
- Read the angle convention on the supplied two-dimensional drawing.
- Use deviations from square in the angled-blank form.
- Calculate each end’s long-to-short edge difference independently.
- Check that both ends extend the same outside edge before adding both differences.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Deviation from square | Zero produces no edge-length difference. |
| Angle from the board edge | Uses a different reference convention. |
| Compound cut | Not described by this two-dimensional model. |
Worked comparison
An illustrative 1 m short edge across a 0.1 m face width with two 45° deviations from square has 0.1 m difference at each end. The long blank is 1 + 0.1 + 0.1 = 1.2 m. At square ends both deviations are zero and the blank remains 1 m. Angles near 90° make the geometric extensions very large.
Check before using the estimate
The calculation is not a machine setup, clamping or cutting instruction.
All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.
Calculation and scope checked 2026-10-04. Methods and scope.