Plastic Bottle Weight Calculator: Grams, Resin and Cost Per 10,000
Enter capacity, diameter, height, wall and material; the calculator estimates bottle weight in grams and the resin needed for 10,000 pieces.
Designed by Joe Joo · 8PCK, Shantou
Resin is priced by the kilogram: 2 g on a 28 g bottle is 7 % of the material cost, and 80 kg of resin across a container.
Want a Person to Check It?
Send the numbers and we reply with a written quotation, lead time and a sample plan — usually within a few hours, Mon–Sat.
The Formula, the Assumptions, and Where It Stops
- Side wall = π × D × H × t.
- Base = π × (D/2)² × t × 1.6 (the base is thicker than the wall).
- Shoulder = π × D × min(D/2, 30) × t × 0.8.
- Mass = total volume × density (PET 1.34, HDPE 0.95, PP 0.90, PETG 1.27 g/cm³).
Assumptions. A smooth body with no ribs, handle or thick collar; those add 5–15 %, which is why the result is quoted ±10 %.
Standards we work to. ISO 9001:2015 (quality system, cert PCC85724Q01277R1S) · EU 10/2011 (plastic food-contact, migration report E2032) · RoHS (PE B-R01612E2033, PET B-R201133464) · ISO 4180 (packaging for transport). The calculator is a planning tool: the approved drawing and the migration report decide the final specification.
Where it does not apply. It is an estimate for planning. The real weight comes from the drawing and a trial mould.
Send the Numbers, Get a Person
Reply with the result above and we come back with a written quotation, packing data and a sample plan — within one business day.
Worked examples
Wall, diameter and height decide the gram weight; the gram weight decides the price. Same formula as the calculator.
| Input | Bottle weight | Resin per 10,000 | Fill ratio |
|---|---|---|---|
| 100 ml PET, Ø40 × 90 mm, 0.6 mm wall | 12 g ±10 % | 123 kg | 0.88 |
| 200 ml HDPE, Ø50 × 120 mm, 0.8 mm wall | 19 g ±10 % | 191 kg | 0.85 |
| 500 ml PET, Ø65 × 160 mm, 0.9 mm wall | 52 g ±10 % | 517 kg | 0.94 |
Why the Weight Matters More Than the Wall
Resin is priced by the kilogram, so a 2 g difference on a 28 g bottle is 7 % of the material cost — and on a 40,000-piece container it is 80 kg of resin. Weight is also what the container payload and the pallet limits are calculated from.
What This Estimate Cannot See
Neck finish, handle, ribs and any thick section at the base. Those add 5–15 %, so treat the number as a planning figure and confirm against a sample.
Questions About This Tool
How much does a 500 ml PET bottle weigh?
Around 25–30 g at 0.55 mm wall; heavier with a pump collar or thick base.
How does rPET change the weight?
Not at all — same density; only the resin cost and colour change.
Is thinner always lower in unit cost?
lower in unit cost in resin, more expensive in returns: below 0.5 mm the shoulder flexes and the pump draws air.
Didn't Solve It?
Tell us what you are trying to pack and we will tell you what fits, what it costs and how long it takes. No forms if you would rather just message.