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Calcimator

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.

Inputs

Results

Part weight (g)

118.75

Part weight (oz)4.19
Part volume (cm³)125
Total weight (g)118.75
Total weight (kg)0.12
Material cost per part ($)$0.30
Total material cost ($)$0.30
How to Use This Calculator
  1. Enter Shape (1=box, 2=cyl, 3=tube), Length (mm), and Width / outer diameter (mm).
  2. Set Height / wall thickness (mm), Plastic density (g/cm³), and Quantity.
  3. Adjust Material cost ($/kg) as needed.
  4. Review the Part weight (g) result.
  5. Use Part weight (oz) and Part volume (cm³) to inform your decision.

How the result changes with Length (mm)

Length (mm)Part weight (g)
10,00011,875
35,00041,562.5
65,00077,187.5
90,000106,875

What each input means

Shape (1=box, 2=cyl, 3=tube)
1 = solid rectangular box, 2 = solid cylinder, 3 = hollow cylinder (pipe/tube).
Length (mm)
Part length in mm.
Width / outer diameter (mm)
Box width or cylinder/tube outer diameter in mm.
Height / wall thickness (mm)
Box height, or wall thickness for hollow cylinders.
Plastic density (g/cm³)
Material density. HDPE ~0.95, PP ~0.90, ABS ~1.05, PC ~1.20, Nylon ~1.13.
Quantity
Number of parts to calculate total weight and cost.
Material cost ($/kg)
Resin price per kilogram.

What each result means

Part weight (g)
Weight of a single part in grams.
Part weight (oz)
Weight of a single part in ounces.
Part volume (cm³)
Volume of a single part.
Total weight (g)
Total weight for all parts.
Total weight (kg)
Total weight in kilograms.
Material cost per part ($)
Raw material cost for one part.
Total material cost ($)
Total raw material cost for all parts.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Shape (1=box, 2=cyl, 3=tube) = 1, Length (mm) = 100, Width / outer diameter (mm) = 50, Height / wall thickness (mm) = 25 = 7 input(s) provided
  2. Calculate Part weight
    Part weight = volumeCm3 * density
    118.75 = 118.75
  3. Calculate Part weight
    Part weight = partWeightG * 0.035274
    4.189 = 4.189
  4. Calculate Part volume
    Part volume = volumeMm3 / 1000
    125 = 125

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