Cast Nylon Weight Calculator
Accurate engineering estimation for PA6G sheets, rods, and tubes
Material Specification
Sheet / Plate (Flat)
Rod / Round Bar
Tube / Hollow Bar
Select the geometry of the raw material.
Standard Cast Nylon (PA6G) density is approx 1.15 g/cm³.
Please enter a valid positive density.
Length of the sheet.
Width of the sheet.
Thickness of the sheet.
Total number of pieces required.
Enter current market rate for Cast Nylon.
Total Estimated Weight
0.00 kg
Unit Weight
0.00 kg
Total Volume
0.00 cm³
Total Cost Est.
0.00
Formula Used: Volume × Density
Material Weight Comparison (Same Volume)
Comparing your Cast Nylon selection vs. Metal alternatives
Specification Summary
| Parameter | Value |
|---|---|
| Material | Cast Nylon (PA6G) |
| Density | 1.15 g/cm³ |
| Quantity | 1 |
What is a Cast Nylon Weight Calculator?
A cast nylon weight calculator is an essential engineering tool designed to estimate the mass of Cast Nylon (PA6G) components before production or ordering. Cast Nylon, or Polyamide 6 Cast, is a high-performance engineering plastic known for its toughness, wear resistance, and damping properties. Because material costs are often calculated by weight (per kilogram or pound) rather than just dimensions, knowing the exact weight is crucial for budgeting and logistics.
Engineers, procurement managers, and machinists use this calculator to determine shipping weights and raw material costs. Unlike generic calculators, a dedicated cast nylon weight calculator utilizes the specific density of cast nylon (typically 1.15 g/cm³), ensuring high accuracy for sheets, rods, and tubes.
Cast Nylon Weight Formula and Mathematical Explanation
The core principle behind calculating the weight of any engineering plastic is simple: Weight = Volume × Density. However, the calculation of volume changes based on the geometry of the stock shape.
The standard density used for Cast Nylon is 1.15 g/cm³ (grams per cubic centimeter). This is slightly higher than extruded nylon (1.14 g/cm³) due to the casting process which results in a more crystalline structure.
Formulas by Shape
- Sheet / Plate: $$ V = Length \times Width \times Thickness $$
- Round Rod: $$ V = \pi \times (\frac{Diameter}{2})^2 \times Length $$
- Tube (Hollow): $$ V = \pi \times [(\frac{OD}{2})^2 – (\frac{ID}{2})^2] \times Length $$
| Variable | Meaning | Unit (Metric) | Typical Range |
|---|---|---|---|
| V | Volume | cm³ | Varies |
| ρ (Rho) | Density | g/cm³ | 1.14 – 1.16 |
| OD / ID | Outer / Inner Diameter | mm | 10mm – 500mm+ |
Practical Examples (Real-World Use Cases)
Example 1: Calculating Cost for Nylon Crane Pads
A construction firm needs to order 4 stabilizer pads made of Cast Nylon sheets.
- Dimensions: 1000mm (L) x 1000mm (W) x 50mm (T)
- Calculation:
Volume = 100cm x 100cm x 5cm = 50,000 cm³
Weight = 50,000 cm³ x 1.15 g/cm³ = 57,500g = 57.5 kg per pad. - Financial Impact: At a price of $10/kg, one pad costs $575. The total for 4 pads would be $2,300.
Example 2: Machining Bushings from Nylon Rod
A machine shop requires a Cast Nylon rod to machine 20 bushings.
- Stock Size: 100mm Diameter x 1000mm Length
- Calculation:
Radius = 5cm.
Volume = π x 5² x 100 = 7,854 cm³
Weight = 7,854 cm³ x 1.15 g/cm³ = 9,032g = 9.03 kg. - Comparison: If this were steel (density ~7.85), it would weigh over 61 kg. Using the cast nylon weight calculator highlights the massive weight saving (over 85%).
How to Use This Cast Nylon Weight Calculator
- Select Shape: Choose between Sheet, Rod, or Tube from the dropdown menu.
- Enter Dimensions: Input your values in millimeters (mm). Ensure accuracy, as small diameter changes affect volume exponentially.
- Verify Density: The default is set to 1.15 g/cm³ for standard PA6G. Adjust if using a filled grade (e.g., Oil-filled Nylon or Molybdenum filled).
- Input Financials: Enter the quantity and price per kg to get a total project estimate.
- Analyze Results: Use the "Copy Estimate" button to save the data for your purchase order or engineering quote.
Key Factors That Affect Cast Nylon Weight Results
When using a cast nylon weight calculator for financial or logistic planning, consider these factors:
- Additives and Fillers: While pure Cast Nylon is ~1.15 g/cm³, Oil-filled nylon (green/yellow) is lighter (~1.135), and Moly-filled (black) is slightly heavier (~1.16). Using the wrong density affects large orders.
- Moisture Absorption: Nylon is hygroscopic. It can absorb up to 7% moisture by weight at saturation. A "dry" calculated weight might differ from the "wet" weight of material stored outdoors.
- Tolerance Variations: Cast nylon stock shapes often have "oversized" tolerances (+0.5mm to +5mm) to allow for machining. The calculator assumes nominal dimensions, but actual billing weight from suppliers usually includes the extra material.
- Machining Waste: If you are calculating the weight of a finished part vs. the raw rod, remember that the removed chips are paid for in the raw material cost.
- Shipping Costs: Carriers charge by weight or volumetric weight. Accurate calculations prevent unexpected freight surcharges.
- Price Fluctuations: The raw material cost (Caprolactam) fluctuates with oil prices. Always update the "Price per Kg" field for accurate financial estimation.
Frequently Asked Questions (FAQ)
What is the density of Cast Nylon vs Extruded Nylon?
Cast Nylon (PA6G) typically has a density of 1.15 g/cm³, while Extruded Nylon (PA6) is about 1.14 g/cm³. While small, this difference matters for precision engineering calculations.
Does color affect the weight of Cast Nylon?
Generally, no. Standard colors (Natural/White, Black/Moly, Blue) have negligible weight differences unless heavy fillers like glass or oil are added specifically to alter properties.
Why is my actual weighed material heavier than the calculation?
This is usually due to "plus tolerances." Manufacturers cast rods and sheets slightly larger than the listed size to allow machinists to clean up the surface. A 50mm sheet might actually measure 52mm thick.
Can I calculate weight for Nylon 6/6 using this tool?
Yes, but you should adjust the density slightly to 1.14 g/cm³, which is the standard for Nylon 6/6.
How do I convert the result to pounds (lbs)?
The calculator displays Metric (kg). To convert to lbs roughly, multiply the kg result by 2.20462.
Is Cast Nylon lighter than Aluminum?
Yes, significantly. Aluminum density is ~2.70 g/cm³, while Cast Nylon is 1.15 g/cm³. Nylon is less than half the weight of Aluminum.
Does this calculator account for cutout waste?
No, this calculator determines the weight of the solid geometric shape. Any cutouts or internal machining should be subtracted manually if you need the finished part weight.
Why is weight calculation important for quoting?
Most plastic stock shapes are sold by the kilogram or pound. Even if you buy "one plate," the price is derived from its theoretical or actual weight.
Related Tools and Internal Resources
Explore our other engineering and financial estimation tools:
- Nylon Sheet Price List – Current market rates for PA6G sheets.
- Engineering Plastic Density Chart – Compare densities of Acetal, PTFE, and Nylon.
- Machining Cost Calculator – Estimate the labor cost for turning and milling plastics.
- Freight & Shipping Estimator – Calculate logistics costs based on material weight.
- PA6G vs PA6 Material Guide – Technical comparison for engineers.
- Universal Rod Weight Calculator – For steel, aluminum, and plastic round bars.