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Calcimator

Gate Size Calculator

Calculate injection mold gate dimensions from part weight, wall thickness, and material flow characteristics.

Inputs

oz
mm
mm

Results

Gate Thickness

1.65 mm

Gate Width3.3 mm
Gate Cross-Section Area5.44 mm²
Gate Land Length1.32 mm
Est. Fill Time5.51 sec
Gate Freeze-Off Time6.81 sec
Recommended Gate TypeEdge gate
How to Use This Calculator
  1. Enter part weight (g), nominal wall thickness (mm), and flow length from gate to farthest point (mm).
  2. Select material viscosity class (low, medium, or high-viscosity resin).
  3. Review recommended gate thickness, gate width, gate cross-section area, and gate land length.
  4. Ensure gate thickness is 50–75% of nominal wall thickness to allow clean gate removal.
  5. Compare estimated fill time to your target — undersized gates cause excessive shear and fill problems.

How the result changes with Nominal Wall Thickness

Nominal Wall ThicknessGate Thickness
2.451.62 mm
7.324.83 mm
138.58 mm
1811.88 mm

What each input means

Part Weight
Weight of a single part in grams.
Nominal Wall Thickness
Nominal wall thickness near the gate location.
Flow Length
Distance from gate to farthest cavity point.
Material Viscosity
Material flow behavior affects gate sizing.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Part Weight = 30, Nominal Wall Thickness = 2.5, Flow Length = 150, Material Viscosity = 2 = 4 input(s) provided
  2. Calculate Gate Thickness
    1.65 = 1.65
  3. Calculate Gate Width
    Gate Width
    3.3 = 3.3
  4. Calculate Gate Cross-Section Area
    Gate Cross-Section Area
    5.44 = 5.44

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