Nylon Weight Calculator
Calculate weight for all nylon grades and shapes with instant, accurate results
Nylon Weight Calculator
Calculation Results
Grade Reference
Nylon Grades & Density Values
Nylon (polyamide) is one of the most widely used engineering plastics, prized for its toughness, low friction, and excellent wear resistance. Density varies meaningfully across grades — using the wrong value leads to significant weight estimation errors.
| Grade | Abbreviation | Density (g/cm³) | Typical Use |
|---|---|---|---|
| Nylon 6 | PA6 | 1.14 | Gears, bearings, bushings, film |
| Nylon 6/6 | PA66 | 1.15 | Automotive parts, electrical connectors |
| Glass-Filled Nylon 30% | PA66-GF30 | 1.37 | Structural parts, housings, brackets |
| Cast Nylon | MC Nylon | 1.16 | Large blocks, rods, sheaves, wear pads |
How Nylon Weight Is Calculated
Weight Formula
Nylon 6 vs Nylon 6/6 — What's the Difference?
Nylon 6 (PA6)
- • Density: 1.14 g/cm³
- • Better impact resistance
- • Easier to process
- • Higher moisture absorption
- • Lower melting point (~220°C)
Nylon 6/6 (PA66)
- • Density: 1.15 g/cm³
- • Higher stiffness and strength
- • Better heat resistance
- • Lower moisture absorption
- • Higher melting point (~265°C)
Note on Glass-Filled Nylon
Glass fiber reinforcement increases density from ~1.14 to ~1.37 g/cm³ at 30% fill — a 20% increase. This significantly affects weight estimates. Always verify the glass fiber percentage with your supplier's datasheet for critical applications.
Nylon Rod Weight Calculator
Nylon rod (round bar) is the most common form calculated on this page. To get the weight of any nylon rod, select Rod / Cylinder in the calculator above, pick your grade, and enter the diameter and length — or use the formula and weight-per-length tables below.
Round Bar Weight Formula
Worked Example: 2" × 48" Nylon 6/6 Rod
Metric check: a 50 mm × 1 m Nylon 6/6 rod is π/4 × 5² × 100 = 1,963.5 cm³ × 1.15 = 2,258 g (2.26 kg). The same rod in cast nylon (1.16 g/cm³) weighs 2,278 g.
Nylon Rod Weight per Foot (Imperial)
| Diameter | Nylon 6/6 (1.15) lb/ft | Cast Nylon (1.16) lb/ft |
|---|---|---|
| 1/4" | 0.024 | 0.025 |
| 3/8" | 0.055 | 0.056 |
| 1/2" | 0.098 | 0.099 |
| 3/4" | 0.220 | 0.222 |
| 1" | 0.392 | 0.395 |
| 1-1/4" | 0.612 | 0.617 |
| 1-1/2" | 0.881 | 0.889 |
| 2" | 1.57 | 1.58 |
| 2-1/2" | 2.45 | 2.47 |
| 3" | 3.52 | 3.55 |
| 4" | 6.27 | 6.32 |
Nylon Rod Weight per Meter (Metric)
| Diameter | Nylon 6/6 (1.15) kg/m | Cast Nylon (1.16) kg/m |
|---|---|---|
| 10 mm | 0.090 | 0.091 |
| 12 mm | 0.130 | 0.131 |
| 16 mm | 0.231 | 0.233 |
| 20 mm | 0.361 | 0.364 |
| 25 mm | 0.565 | 0.569 |
| 30 mm | 0.813 | 0.820 |
| 40 mm | 1.45 | 1.46 |
| 50 mm | 2.26 | 2.28 |
| 60 mm | 3.25 | 3.28 |
| 80 mm | 5.78 | 5.83 |
| 100 mm | 9.03 | 9.11 |
Nominal solid round bar, calculated from the densities in the grade table above. Nylon 6 (1.14 g/cm³) is about 1% lighter than Nylon 6/6; 30% glass-filled nylon (1.37 g/cm³) is about 19% heavier. Actual stock is often supplied slightly oversize, so finished weights can run a few percent higher.
Frequently Asked Questions
What is the density of nylon?
Nylon density varies by grade: Nylon 6 is 1.14 g/cm³, Nylon 6/6 is 1.15 g/cm³, Cast Nylon 6 (MC Nylon) is 1.16 g/cm³, and 30% glass-filled nylon is 1.37 g/cm³. Nylon is heavier than HDPE (0.955 g/cm³) and polypropylene (0.905 g/cm³) but lighter than PVC (1.40 g/cm³). Glass-filled grades weigh approximately 20% more than unfilled nylon for the same volume.
How do I calculate nylon rod weight?
Nylon rod weight = π × (diameter ÷ 2)² × length (mm) ÷ 1000 × density (g/cm³). For a 50 mm diameter × 1000 mm long Nylon 6/6 rod (1.15 g/cm³): π × 25² × 1000 ÷ 1000 × 1.15 = 1,963.5 × 1.15 = 2,258 g (2.258 kg). For cast nylon rod (1.16 g/cm³), the same dimensions give 2,278 g. Select Rod shape in the calculator above and enter your diameter and length.
How much does nylon rod weigh per foot?
Using W = π/4 × D² × L × ρ with Nylon 6/6 at 1.15 g/cm³: 1/2" nylon rod weighs 0.098 lb/ft, 1" rod weighs 0.392 lb/ft, 2" rod weighs 1.57 lb/ft, and 4" rod weighs 6.27 lb/ft. In metric, 25 mm nylon rod weighs 0.565 kg/m and 50 mm rod weighs 2.26 kg/m. Cast nylon (1.16 g/cm³) is about 1% heavier. See the nylon rod weight tables above for more diameters, or select Rod / Cylinder in the calculator for any size.
How do I calculate cast nylon weight?
Cast nylon 6 has a density of 1.16 g/cm³ — slightly higher than injection-grade Nylon 6 (1.14 g/cm³) due to higher molecular weight and crystallinity from the casting process. Select "Cast Nylon 6 (MC Nylon)" from the grade dropdown. Weight = volume (cm³) × 1.16. For large-diameter cast rod: volume = π × (D/2)² × L ÷ 1000. Cast nylon is commonly available in large-diameter billets and slab stock not available in extruded form.
What is the nylon weight calculation formula?
Sheet: Weight (g) = L × W × T (mm) ÷ 1000 × Density (g/cm³). Rod: Weight (g) = π × (D ÷ 2)² × L (mm) ÷ 1000 × Density. Tube: Weight (g) = π × ((OD ÷ 2)² − (ID ÷ 2)²) × L (mm) ÷ 1000 × Density. For imperial dimensions in inches, multiply each dimension by 25.4 before applying the formula, or use the imperial unit toggle in the calculator above.
How do I calculate nylon sheet weight?
Nylon sheet weight = Length (mm) × Width (mm) × Thickness (mm) ÷ 1000 × Density (g/cm³). For a 500 mm × 500 mm × 25 mm Nylon 6 sheet (1.14 g/cm³): (500 × 500 × 25) ÷ 1000 × 1.14 = 6,250 × 1.14 = 7,125 g (7.125 kg). For Nylon 6/6 (1.15 g/cm³), the same dimensions give 7,188 g. Use the Sheet shape in the calculator above and switch to imperial if your dimensions are in inches.