Material Cost Per Part Calculator

Calculate total cost per injection-molded part including material (with runner waste and regrind), machine time, and overhead. Shows cost breakdown percentages.

Inputs

Part weight (g)

Resin price ($/kg)

Cycle time (sec)

Number of cavities

Machine rate ($/hr)

Runner waste (%)

Regrind recovery (%)

Scrap rate (%)

Overhead rate ($/hr)

Tab to move between fields

Results

Total cost per part ($)

$0.73

Material cost per part ($)$0.06

Machine cost per part ($)$0.5

Overhead cost per part ($)$0.17

Material %8.9

Machine %68.4

Overhead %22.8

Parts per hour120

Cost per 1,000 parts ($)$731.46

Effective material per part (g)25.92

How to Use This Calculator

Enter Part weight (g), Resin price ($/kg), and Cycle time (sec).
Set Number of cavities, Machine rate ($/hr), and Runner waste (%).
Adjust Regrind recovery (%), Scrap rate (%) as needed.
Review the Total cost per part ($) ($) result.
Use Material cost per part ($) ($) and Machine cost per part ($) ($) to inform your decision.

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