Plastics
Planning calculators for plastics — estimates from industry-style inputs.
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Melt Flow Index Interpretation Calculator
Interpret MFI test results to determine shear rate, apparent viscosity, molecular weight distribution breadth, and recommended processing method.
Injection Molding Clamp Tonnage Calculator
Calculate required clamping force for injection molding from projected part area, cavity pressure, number of cavities, and runner system.
Thermoforming Draw Ratio Calculator
Calculate areal and linear draw ratios for thermoformed parts. Estimates wall thinning, minimum wall thickness, and forming feasibility.
Extrusion Die Swell Calculator
Calculate die swell ratio from material elasticity, L/D ratio, shear rate, and melt temperature. Determine required die dimensions to achieve target extrudate size.
Recycling Grade Value Calculator
Estimate the market value of recycled plastic based on resin type, contamination level, color, form, and source. Compare against virgin resin pricing.
Injection Molding Cooling Time Calculator
Calculate cooling time using the flat-plate analytical solution: t = (s²/(π²·α)) × ln(8(Tm−Tw)/(π²(Te−Tw))). Determines total cycle time and production rate.
Plastic Part Weight Calculator
Calculate plastic part weight from volume and density for solid boxes, solid cylinders, or hollow tubes/pipes. Includes material cost estimate.
Shrinkage Compensation Calculator
Calculate mold cavity dimensions to compensate for plastic shrinkage in flow, cross-flow, and thickness directions. Assesses warpage risk and tolerance feasibility.
UV Degradation Life Estimator
Estimate outdoor service life of plastic parts based on material type, UV stabilizer loading, climate UV exposure, temperature, wall thickness, and pigmentation.
Material Cost Per Part Calculator
Calculate total cost per injection-molded part including material (with runner waste and regrind), machine time, and overhead. Shows cost breakdown percentages.