Bioplastics & Biomaterials Processing calculator

Bio-Based Content Percentage Calculator

Bio-based content percentage helps material teams check whether a PLA blend, PHA compound, PBS/PBAT formulation, starch-filled resin, cellulose material, or bio-based additive package meets product, customer, or certification targets. It is useful during formulation, purchasing, and sustainability claim reviews.

What this calculator does

  • Calculate bio-based content from renewable carbon or bio-based material weight against total formulation weight, with a target content requirement.
  • a product developer or sustainability manager needs to verify bio-based content for a formulation, package, or molded part
  • Returns the renewable or bio-based share of the formulation on the entered mass basis.

Formula used

  • Bio-based content = bio-based material weight ÷ total formulation weight × 100
  • Bio-based content gap to target = bio-based content - target bio-based content

Inputs explained

  • Bio-based material weight: Use certified bio-based resin, renewable filler, bio-based additive, or renewable carbon-equivalent weight included in the formulation.
  • Total formulation weight: Include all resin, fossil-based modifier, filler, fiber, additive, color, coating, and masterbatch weight in the blend.
  • Target bio-based content: Use the customer, certification, regulatory, marketing, or internal sustainability target for the product.

How to use the result

  • Use it for formulation checks, product claims, supplier comparisons, customer specifications, and certification preparation.
  • It is not a certification result; some standards use renewable carbon, radiocarbon testing, or dry-weight rules that may differ from simple mass share.

Common questions

  • Should mineral filler count as bio-based? Only count filler as bio-based if it qualifies under the target standard or customer definition being used.
  • Can recycled bio-resin be included? Yes, if your claim or certification allows recycled bio-based material and the supplier documentation supports it.
  • Is this the same as compostable content? No. Bio-based content and compostability are different claims; a bio-based material may not be compostable.
  • How can I use the result? Use it to adjust blend ratios, support purchasing decisions, and identify whether a formulation meets content targets.

Last reviewed 2026-05-12.