Cost Calculator AI
Manufacturing & IndustrialUnit Economics

Cost Per Unit Calculator

Calculate average manufacturing cost per unit and evaluate defect cost penalties across gross production versus first-pass good units.

Per-Unit Absorption Breakdown

Total Unit Cost
—
DM + DL + Allocated OH
Overhead / Unit
—
Fixed OH / Volume
Direct Cost / Unit
—
Material + Labor
Total Batch Cost
—
Unit Cost × Volume

Cost Per Unit Formula

Cost Per Good Unit = Total Production Cost ÷ Good Units Produced (Gross Units - Defects)
  • Gross Output: Total pieces processed through the manufacturing line.
  • Defective Units: Off-spec or non-conforming parts rejected during quality control.
  • Defect Premium: Incremental cost burden borne by surviving good units.

Step-by-Step Worked Example

Scenario: Stamping 1,000 metal brackets with 50 quality rejects

Calculation Steps:

  1. Cost Per Gross Unit = $10,000 / 1,000 = $10.00
  2. Good Units = 1,000 - 50 = 950 (95% Yield)
  3. Cost Per Good Unit = $10,000 / 950 = $10.53
  4. Defect Premium = $10.53 - $10.00 = +$0.53 / good unit
Result: Cost per good unit is $10.53. Scrap reduces yield to 95%, adding a $0.53 defect penalty per salable bracket.

How to Use This Calculator

  1. 1Input total production expenditures incurred for the manufacturing run.
  2. 2Enter total gross units produced.
  3. 3Specify any defective or scrapped units to determine true cost per good unit.

Assumptions & Limitations

  • Scrapped units retain zero resale value unless explicitly adjusted.
  • Zero production quantity returns a normalized zero result rather than a divide-by-zero error.

Frequently Asked Questions

Why does cost per unit increase when scrap occurs?

Because the entire production budget (materials, labor, and machine time) is absorbed solely by the salable good units that can be sold to customers.

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