Machine sizing
Clamp Tonnage Calculator
Estimate injection molding clamp force from projected area and cavity pressure.
Tools hub
Calculators with useful engineering context
Choose an injection molding calculator below. Materials and other process families are structured for careful expansion.
Machine sizing
Shot Size Calculator
Calculate injection molding shot weight including cavities, runner, and cushion.
Machine sizing
Shot Volume Calculator
Convert injection molding shot weight to melt volume.
Machine sizing
Projected Area Calculator
Estimate total projected area for an injection mold.
Process
Injection Molding Cycle Time Calculator
Calculate total cycle time and cooling share.
Process
Cooling Time Calculator
Estimate cooling time using a flat-wall heat-transfer model.
Production
Parts Per Hour Calculator
Calculate injection molding production output from cycle time.
Mold planning
Cavity Count Calculator
Estimate a minimum cavity count from demand and available time.
Mold planning
Mold Shrinkage Calculator
Calculate nominal cavity size from part dimension and linear shrinkage.
Materials
Resin Weight Calculator
Calculate resin mass from volume, density, and cavities.
Costing
Material Cost Per Part Calculator
Estimate resin material cost per molded part.
Quality
Scrap Rate Calculator
Calculate manufacturing scrap rate and yield.
Production
Machine Utilization Calculator
Calculate time-based injection molding machine utilization.
Costing
Mold Amortization Calculator
Calculate tooling and maintenance cost allocated to each part.
Decision map
Follow the evidence record, not a generic tool list.
Choose the first calculation from the data you can document, then use its output to define the next constraint. Each route ends with a machine, material, mold, production, or commercial cross-check.
- 01Part and geometry
Start with a CAD projection on the parting plane, cavity count, and runner projection.
Next calculationProjected Area → Clamp Tonnage; then check platen, tie-bar, and mold-height fit.
- 02Injection unit
Start with weighed part and runner mass, cavity count, cushion, exact resin, and machine rating basis.
Next calculationShot Size → Shot Volume; then compare screw stroke and documented injection-unit limits.
- 03Thermal and output
Start with the controlling wall, thermal inputs, a defined cycle boundary, cavities, and planned uptime.
Next calculationCooling Time → Cycle Time → Parts Per Hour.
- 04Capacity and quality
Start with demand, compatible-machine hours, observed availability, and a consistent good-versus-scrap count.
Next calculationCavity Count, Machine Utilization, and Scrap Rate separate capacity loss from quality loss.
- 05Material and cost
Start with weighed or validated mass, grade-specific data where mass is derived, purchase price, and a stated recovery rule.
Next calculationResin Weight → Material Cost → Mold Amortization; keep conversion costs separate.
Phase 3 reference tools
More documented injection-molding checks
Mold geometry
Runner Volume Calculator
Cold-runner volume from circular runner diameter and total centerline length.
Materials
Runner Weight Calculator
Cold-runner mass from runner volume and the stated material density.
Mold geometry
Sprue Volume Calculator
Estimate the volume of a tapered circular sprue as a frustum.
Injection unit
Screw Stroke Calculator
Convert a documented shot volume to an ideal screw-forward stroke.
Injection unit
Injection Unit Utilization Calculator
Compare a planned shot volume with a documented usable injection-unit volume.
Injection unit
Residence Time Calculator
Estimate barrel residence time from barrel melt mass, shot mass, and cycle time.
Process
Screw Recovery Time Calculator
Estimate recovery time from shot volume and measured plasticizing rate.
Process
Fill Time Calculator
Estimate cavity fill time from total cavity volume and volumetric injection rate.
Machine fit
Platen Fit Calculator
Screen a mold footprint against machine platen dimensions, including rotation.
Machine fit
Tie-Bar Clearance Calculator
Check the remaining width and height clearance inside a four-tie-bar opening.
Machine fit
Mold Height Compatibility Calculator
Check whether a mold height lies inside the machine’s stated height range.
Production
Parts Per Shift Calculator
Estimate good parts per shift from cycle time, cavities, uptime, and scrap rate.
Production
OEE Capacity Calculator
Estimate good-part capacity using availability, performance, quality, cycle, and cavities.
Quality
Scrap-Adjusted Output Calculator
Convert gross molded output and scrap rate into expected good output.
Materials
Regrind Blend Calculator
Calculate virgin and regrind mass for a planned blend percentage.
Materials
Masterbatch Dosage & Let-Down Ratio Calculator
Build an explicit total-blend, base-resin-addition, or active-content recipe and report both ratio conventions.
Materials
Resin Purchase Quantity Calculator
Estimate virgin resin purchase mass and package count for a production order.
Costing
Machine Cost Per Part Calculator
Allocate machine-hour cost to one molded part using cycle, cavities, and uptime.
Costing
Break-Even Volume Calculator
Calculate the sales volume needed to recover a fixed tooling investment.
Mold Cooling & Thermal Control Tools
Connect cooling-time estimates to circuit flow, thermal load, chiller capacity and measured validation.
Process Validation & Stability Tools
Build controlled molding-study evidence from fill behavior through cavity balance, pressure demand, gate seal and repeatability.
Energy operations
Injection Molding Energy Measurement & Efficiency
Four tools for measured product energy, idle shutdown break-even, machine upgrade payback, and startup peak-demand screening.
Part Design & DFM
Injection Molding Part Design & DFM Tools
Four independent screens for wall uniformity, ribs, bosses, and draft/texture requirements.
Plastic extrusion
Extrusion Setup & Line Balance Calculators
Six connected tools for actual output, product mass flow, screw surface speed, average residence time, tube drawdown, and cooling-path planning.
Film laboratory data
Film & Flexible Packaging Test Calculators
Five independent tools for tensile and elongation, static and kinetic friction, normalized seal strength, corrected haze, and dart-impact failure weight.