Should startup purge be included?

Include it by increasing runtime, use rate, or running a separate startup scenario if purge is significant.

Can this be used for additives?

Yes, if the use rate and cost are entered for the additive or masterbatch rather than the base resin.

What if throughput changes during the run?

Use an average rate or split the run into separate scenarios for startup, steady production, and slowdown conditions.

How can I use the result?

Use it to stage enough resin, estimate run cost, update purchase needs, and compare process rates or line speeds.

Bioplastics & Biomaterials Processing calculator

Bio-Resin Usage Calculator

Bio-resin usage planning helps processors buy and stage the correct amount of PLA, PHA, PBAT, PBS, starch blend, cellulose compound, filler, fiber, color, and additive for a production run. It also gives a quick material cost estimate for runtime-based production plans.

What this calculator does

Estimate bio-resin, compound, filler, or additive consumption and run cost from use rate, runtime, and cost per unit for extrusion, molding, or packaging runs.
a processor needs to estimate resin consumed and material cost for a planned extrusion, compounding, molding, sheet, film, or packaging run
Returns estimated material consumed and material run cost for the planned processing time.

Formula used

Bio-resin consumed = bio-resin use rate × planned processing runtime
Bio-resin run cost = bio-resin consumed × bio-resin cost per unit

Inputs explained

Bio-resin use rate: Use measured or planned consumption for resin, compound, additive blend, filler, fiber, sheet, film, or pellet output.
Planned processing runtime: Enter production, trial, startup, or service runtime for the extruder, molding press, sheet line, or packaging line.
Bio-resin cost per unit: Use landed cost for the resin, compound, filled blend, masterbatch, or additive package on the same weight basis.

How to use the result

Use it for resin staging, purchase planning, production scheduling, trial costing, and run-cost estimates.
It assumes a steady use rate and does not separately model scrap, drying loss, purge, trim, or regrind recovery.

Common questions

Should startup purge be included? Include it by increasing runtime, use rate, or running a separate startup scenario if purge is significant.
Can this be used for additives? Yes, if the use rate and cost are entered for the additive or masterbatch rather than the base resin.
What if throughput changes during the run? Use an average rate or split the run into separate scenarios for startup, steady production, and slowdown conditions.
How can I use the result? Use it to stage enough resin, estimate run cost, update purchase needs, and compare process rates or line speeds.

Last reviewed 2026-05-12.