Injection Molding Cycle Time Calculator

Calculate total cycle time and cooling share. This practical tool is an engineering estimate—validate decisions against machine, material, mold, and process data.

Formula and method

Cycle time is the sum of fill, pack, cooling, and mold-motion steps.

Inputs and units

Enter measured or specified values in the displayed units. Keep units consistent; results are rounded for practical planning. This first release uses the displayed engineering units rather than a unit-switcher.

Worked example

2.5 s fill + 5 s pack + 18 s cooling + 5 s mold motion = 30.5 s.

Use this to connect process settings with output

Enter the observed or planned duration of each phase. The total is useful for capacity planning only when the definition of cycle start and end is consistent.

What changes the result most

Cooling, pack/hold, mold movement, automation, and part removal. Cooling often deserves the first optimization review.

Common mistake

Reducing a set time without checking ejection quality, dimensions, or gate freeze-off.

Interpretation, assumptions, and limitations

This tool provides an estimate for planning and education. It does not replace machine maker limits, material data sheets, mold trials, cavity-pressure data, process validation, or qualified engineering review.

FAQ

Can I use this as a final production setting?

No. Confirm with validated process data and the applicable machine and material documentation.

Why can the real result differ?

Geometry, melt behavior, pressure loss, material lot, temperature, cooling layout, and operating practice can materially affect results.