Purchased stock length is not installed finished length.
Which losses have already been included in the installed cut list?
Use the matching calculator
Use this decision sequence
- List the specified finished cut lengths before applying machining losses.
- Identify saw kerf, end trimming and any separate fabrication allowances.
- Allocate cuts to usable stock rather than dividing total cut length by stock length alone.
- Report unallocated remainder separately from consumed kerf and finished installed material.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Finished cuts | Required resulting pieces. |
| Kerf and trim | Consumed stock not installed in the project. |
| Offcuts | Remaining pieces whose reuse needs a separate allocation. |
Worked comparison
Two illustrative 1.5 m finished cuts cannot both come from one exactly 3 m usable stock if the stated cut accounting also consumes 0.003 m kerf for each cut. Their finished sum is 3 m, but the model’s stock use is 3.006 m. A total-length ratio can therefore predict too few source pieces even before other trim allowances.
Check before using the estimate
Use the applicable cut accounting and actual usable stock dimensions; no cutting procedure is prescribed.
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.
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