Free Cost Per Part Calculator

What does one part actually cost to make? Machine time, labor, material, and the scrap adder — calculated live in your browser.

Calculator

Machine rate ($/hr)

Cycle time (s)

Parts per cycle

Labor rate ($/hr)

Operators per machine

Material cost ($/part)

Scrap rate (%)

Machine $/part

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Labor $/part

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Before scrap

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Cost per part

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How cost per part is calculated

cost/part = (machine + labor + material) ÷ (1 − scrap rate)

Machine = machine rate × cycle time ÷ 3600 ÷ parts per cycle
Labor = labor rate × operators per machine × cycle time ÷ 3600 ÷ parts per cycle
Scrap adder — every scrapped part's cost is carried by the good ones, so divide by (1 − scrap%).

With the defaults: machine $0.813 + labor $0.175 + material $1.850 = $2.838 before scrap → $2.895 per part at 2% scrap. Small scrap percentages quietly become real money at volume.

Where the machine rate comes from

The $/hr rate should carry depreciation, maintenance, energy, floor space, and consumables — building that number defensibly is half the battle, and it's the first tab of the full workbook.

This calculator does the single calculation. The workbook does the whole study.

The full workbook builds the machine rate from depreciation, maintenance, energy, floor space, and consumables, then runs a 20-part cost model with overhead and annualized totals.

See the Cost per Part / Machine Rate Calculator workbook — $29 →