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The numbers you need before you send an RFQ.

Seven free calculators built on the same practice we use on client programs. No signup, no limits, no sales call. If a result surprises you, an engineer will look at it with you.

7 toolsFree, no accountReviewed October 2026

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Injection mold RFQ builder

Seven guided steps capture every spec a mold maker needs: part, resin, cavitation, tolerances, texture, volumes, delivery. Export a branded PDF your suppliers can quote from the same day.

Build your RFQ

Six calculators for the engineering behind the quote

Clamp force calculatorTonnage from projected area, cavities, runner and material factor.tonnage Plastic shrinkage calculatorCavity dimensions from part size and resin shrink, 30+ resins.150+ resins Draft angle calculatorMinimum draft by material, texture depth and wall height.textures Hardness converterBrinell, Rockwell and Vickers per ASTM E140 for mold steels.ASTM E140 Project timeline estimatorGantt chart for a mold build, projected against actual dates.weeks Profitability calculatorCost per part, margin and payback for a tooling program.per part

How we use these on real programs

01

Size the press

Clamp force and shrinkage set the machine and the cavity steel before anyone quotes.

02

Fix the part

Draft angle against the texture spec catches the drag marks that show up at T1.

03

Write the RFQ

A complete RFQ gets three comparable quotes instead of three different guesses.

04

Hold the schedule

The timeline tool is the same Gantt we report against weekly during the build.

A result you do not trust?

Send the part and the number. An engineer replies within one business day.

Start a tooling review (336) 517-7329