Can I use pallet-days?

Yes, if both stored inventory and storage cost use pallet-days or another consistent inventory basis.

Should expired resin be included?

Include storage cost while it was held, but treat expired or downgraded resin as scrap, rework, or inventory write-off separately.

Where does humidity control go?

Use the fixed storage control cost for monitoring, desiccant, dry-room controls, or special liners.

How can I use the result?

Use it to compare stocking strategies, justify dry storage, set reorder quantities, and include storage cost in resin economics.

Bioplastics & Biomaterials Processing calculator

Biomaterial Storage Cost Calculator

Biomaterial storage may require sealed packaging, humidity control, FIFO tracking, cold or dry rooms, lot segregation, certification documentation, and shelf-life management. Materials buyers and warehouse managers use this calculator to estimate storage cost for PLA, PHA, PBAT blends, starch compounds, cellulose materials, and additives.

What this calculator does

Estimate storage cost for moisture-sensitive or certified bio-resins, compounds, additives, and biomaterial inventory using inventory volume, storage cost, allocation, and fixed controls.
a biomaterials processor needs to cost inventory storage for resin, compound, regrind, additives, or certified material lots
Returns estimated storage cost assigned to biomaterial inventory or certified material lots.

Formula used

Allocated variable storage cost = stored biomaterial inventory × storage cost per inventory unit × storage cost allocation share
Total biomaterial storage cost = allocated variable storage cost + fixed biomaterial storage control cost

Inputs explained

Stored biomaterial inventory: Use resin bags, gaylords, pallets, additives, regrind, or certified lots stored during the reporting period.
Storage cost per inventory unit: Use warehouse, dry-room, humidity-control, cold-storage, financing, or handling cost on the selected unit basis.
Storage cost allocation share: Use 100% for the full inventory or allocate to one resin grade, customer, SKU, plant, or certification program.
Fixed biomaterial storage control cost: Add humidity monitoring, desiccant, sealed liners, lot documentation, recertification, or special handling cost.

How to use the result

Use it for inventory carrying cost, resin shelf-life reviews, humidity-control decisions, and supplier stocking comparisons.
It does not estimate degradation or shelf-life loss; verify storage temperature, humidity, packaging, and material age separately.

Common questions

Can I use pallet-days? Yes, if both stored inventory and storage cost use pallet-days or another consistent inventory basis.
Should expired resin be included? Include storage cost while it was held, but treat expired or downgraded resin as scrap, rework, or inventory write-off separately.
Where does humidity control go? Use the fixed storage control cost for monitoring, desiccant, dry-room controls, or special liners.
How can I use the result? Use it to compare stocking strategies, justify dry storage, set reorder quantities, and include storage cost in resin economics.

Last reviewed 2026-05-12.