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MEASUREMENTS AND PURCHASE DECISIONS

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

  1. List the specified finished cut lengths before applying machining losses.
  2. Identify saw kerf, end trimming and any separate fabrication allowances.
  3. Allocate cuts to usable stock rather than dividing total cut length by stock length alone.
  4. Report unallocated remainder separately from consumed kerf and finished installed material.

Keep the quantities distinct

Quantity or assumptionHow to use it
Finished cutsRequired resulting pieces.
Kerf and trimConsumed stock not installed in the project.
OffcutsRemaining 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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