This pouch capacity calculator estimates how much a stand-up or flat-bottom pouch holds from its outside dimensions. Enter width, height and bottom gusset to get usable volume in ml, litres and US fluid ounces, plus an approximate fill weight. It is the fastest way to check whether a pouch size fits your 250 g, 500 g or 1 kg product before requesting samples.
Estimate capacity
All dimensions in centimetres (cm).
Default 0.5 covers sealed base, headspace and incomplete squaring.
Your result
Size needed for common fill weights
Pouch volume required at the current density and fill factor.
The formula & fill factor
A filled stand-up pouch never uses its full geometric volume, so we apply a practical fill factor:
- Volume (ml) = W x gusset x H x 0.5 (cm)
- The 0.5 factor accounts for the sealed base, headspace and the pouch not squaring out fully.
- Enter a product density to convert volume to weight: whole-bean coffee about 0.35 g/ml, ground coffee about 0.55, powders 0.5-0.9, granola about 0.25.
- Weight (g) = volume (ml) x density (g/ml). 1 US fl oz = 29.5735 ml.
Treat the result as a starting point for sizing; the exact fill depends on product flow, headspace and how the pouch stands.
Typical pouch sizes and capacity
How common stand-up pouch sizes map to volume using the formula above (W x H x gusset in mm; volume at a 0.5 fill factor).
| Typical use | W x H x gusset (mm) | Est. volume | Litres | Action |
|---|---|---|---|---|
| Coffee 250 g | 130 × 205 × 80 | |||
| Coffee 500 g | 160 × 230 × 90 | |||
| Coffee / pet food 1 kg | 210 × 310 × 110 | |||
| Bulk 2 kg | 260 × 360 × 120 | |||
| Snack 100 g | 110 × 180 × 60 |
Ready to order? Get these bag types made
Turn the numbers above into a finished spec sheet. Send us your dimensions, material and quantity and our engineers reply with a firm quote and free samples within one business day, produced in-house at our own cleanroom facility.
Need this spec produced, not just calculated?
{{site.name}} is not a variable here; we are a direct manufacturer of custom flexible packaging, producing in-house in a cleanroom facility. Send us your target numbers and our team will confirm feasibility and quote, with free design support included.
Frequently asked questions
How do I calculate the capacity of a stand-up pouch?
Multiply width x gusset (depth) x height in centimetres to get the geometric volume in ml, then multiply by a fill factor of about 0.5 for a realistic usable volume.
Why is the usable volume less than width x height x gusset?
The sealed base, side seals, top headspace and the rounded shape of a filled pouch mean it never forms a perfect box, so only part of the geometric volume holds product.
How do I convert pouch volume to product weight?
Multiply the usable volume in ml by the product bulk density in g/ml. For example, 1,656 ml of whole-bean coffee at 0.35 g/ml is about 580 g.
Can you make a custom pouch size for my fill weight?
Yes. Send your product, target weight and preferred material and we will recommend dimensions, confirm feasibility and quote custom sizes.
Results are engineering estimates for planning and quoting. Real-world values vary with material lot, structure, tolerance and process. For production-grade figures, confirm with our team.