Apply for financingInjection molding estimates
Estimate injection molding batch cost and cost per required good part from cavity count, cycle time, reject allowance and your resin and machine rates. See unit cost with and without allocated tooling. All prices are planning estimates, not a mold quote; the sample inputs are not market benchmarks.
Estimated molding batch cost
$5,567.50
Cost estimate from your inputs, not a supplier quote or selling price. Taxes, shipping and profit are excluded. Dengaro is an equipment-financing broker, a brand of Funding Routes LLC, not the lender. The equipment link does not send this job cost as a loan amount. Financing is subject to provider review; approval and rates are not guaranteed.
How it works
Divide the required good parts by active cavities times the expected good-part yield, then round up to a whole shot count. Each shot consumes one full cycle and the material for every cavity, including parts expected to be rejected. Add the unrecovered runner-and-sprue mass once per shot, not once per cavity. Convert total grams to kilograms before applying the resin price. Add machine time, batch setup cost and the tooling cost allocated to this order. Divide by requested good parts, not gross molded parts. Expected yield is a planning average and cannot guarantee an accepted quantity on an actual run.
Formula
Yield = 1 − reject percentage ÷ 100. Machine hours = shots × cycle seconds ÷ 3,600. Resin kg = shots × (cavities × part grams + unrecovered runner grams per shot) ÷ 1,000. Batch cost = resin kg × resin price + machine hours × machine rate + setup + allocated tooling. Unit cost = batch cost ÷ required good parts.
Example
Two cavities and 10% rejects require 500 shots for 900 expected good parts out of 1,000 gross parts. A 36-second cycle gives five machine hours at $60/h, or $300. Each shot uses 45 g: two 20 g parts plus a 5 g unrecovered runner. The 22.5 kg of resin costs $67.50 at $3/kg. Add $200 setup and $5,000 allocated tooling: $5,567.50, or $6.19 per requested good part. Excluding tooling, it is about $0.63 per part.
Tips
Use a cycle time that includes fill, pack, cooling and ejection. Use active cavities, not nominal cavity count when cavities are blocked. The machine rate should include labor, utilities and routine overhead. Enter only runner mass not recovered into usable feedstock; this is not a detailed regrind model. Add startup purge, finishing, inspection and packaging to your allowances when needed. Allocate tooling over the volume it will actually serve instead of charging the full mold twice.
Equipment
The links are for injection molding equipment financing, not resin, job costs or working capital. Dengaro is an equipment-financing broker and a brand of Funding Routes LLC, not the lender. Batch and per-part results are not forwarded as loan amounts. A financing provider determines any approval, rate and terms after review.
Important questions
Only the tooling cost you allocate to this batch. Enter the full mold cost for a one-order allocation, a planned share for a longer program, or zero to examine production-only economics. The calculator does not estimate mold design or fabrication prices.
Ten percent rejects means only 90% of gross output is expected to be good. Required gross output is good demand divided by 0.90, not multiplied by 1.10. Whole shots are rounded up after accounting for cavity count.
Enter unrecovered runner and sprue grams for the entire shot. Part mass is per individual molded part. For a hot-runner tool with no unrecovered runner loss, enter zero; rejected part resin is still included in gross production.
No. Reject rate is an average planning assumption, and actual scrap can vary. Startup rejects, purge, downtime, secondary work, tax, shipping and profit are not automatically added. Include appropriate allowances and obtain a production quote before committing to a price or delivery quantity.
Molding equipment financing