Injection Molding calculator
Regrind Savings Calculator
Estimate plastic regrind savings from reused resin quantity, resin cost, and handling burden. Add quantity, variable cost, labor, and burden to see total cost and cost per piece in one place.
What this calculator does
- Estimate plastic regrind savings from reused resin quantity, resin cost, and handling burden.
- Use it when regrind savings in injection molding is being quoted and you need a number you can defend on a phone call.
- Turns regrind savings quantity, variable regrind savings cost, fixed regrind savings cost into a total cost for regrind savings in injection molding.
Formula used
- Total regrind savings cost = regrind savings quantity × variable regrind savings cost + fixed regrind savings cost + labor and overhead adder
- Cost per unit = total regrind savings cost ÷ regrind savings quantity
Inputs explained
- Regrind savings quantity: Enter the units, parts, kits, assemblies, or jobs covered by the quote or production run.
- Variable regrind savings cost: Use the per-unit material, labor, test, service, or supplier cost from the BOM, quote, ERP, or cost model.
- Fixed regrind savings cost: Add setup, tooling, freight, engineering, inspection, or other fixed cost assigned to this calculation.
- Labor and overhead adder: Include labor, burden, handling, testing, or support cost not already captured in the variable cost.
How to use the result
- Use it when regrind savings in injection molding needs a fast quote build-up.
- Tariffs, freight, and packaging are not modeled. Add them as a fixed adder if they apply.
Common questions
- What does the regrind savings calculator give me? Estimate plastic regrind savings from reused resin quantity, resin cost, and handling burden. You get a total cost you can defend before quoting, scheduling, or sign-off.
- Which assumptions drive the total cost? regrind savings quantity, variable regrind savings cost, fixed regrind savings cost usually move the total cost most. Pull from measured injection molding runs, supplier data, and recent quotes rather than memory.
- How should I use the result? Use the cost per piece as the floor of the quote, then layer in margin for injection molding risk.
- What should I verify first? Confirm scrap and yield are reflected in variable cost; missing scrap is the usual reason a quote bleeds.
Last reviewed 2026-05-12.