Bag Dimensions From the bag specification

Base Length cm

Base Width cm

Body Height cm

Vertical Body Seams seams

Four for a four-panel bag, two for a U-panel, none for a circular woven tube.

Seam Allowance per Edge cm

Filling Spout Diameter (0 = None) cm

Filling Spout Length cm

Discharge Spout Diameter (0 = None) cm

Discharge Spout Length cm

Fabric, Loops & Load From the fabric and webbing specifications

Base Fabric Weight g/m²

Coating or Lamination Weight (0 = Uncoated) g/m²

Lifting Loops loops

Webbing Length per Loop cm

Cut length of webbing, including the part sewn to the body.

Webbing Weight g/m

Safe Working Load kg

Bag Tare (Fabric + Loops)

— kg

Fabric area at base plus coating weight, plus the webbing in the loops

Fabric & Mass

Body Fabric: — m²
Top and Bottom Panels: — m²
Spouts: — m²
Fabric per Bag: — m²
Outer Faces of the Bag (for Comparison): — m²
Fabric Mass incl. Coating: — kg
Loop Webbing Mass: — kg
Tare as a Share of SWL: — %
Bags per Tonne of Coated Fabric: — bags

Every dimension and weight is the bag specification's; the tool has no typical figure of its own. The body is a tube the height of the bag plus a seam allowance top and bottom, with an allowance on each side of every vertical seam; a circular woven body has none. Top and bottom panels are counted flat with an allowance round each edge, and spouts as plain cylinders, so a duffle top, a cone bottom or a baffle bag needs its extra fabric added. Thread, labels, document pouches, liners and fabric lost in cutting are not counted, so a weighed bag comes out heavier. **This is a fabric and mass estimate, not a safety rating: the safe working load and the safety factor come from the bag's own type test.**

FIBC Bulk Bag Fabric: Body, Top, Bottom & Spout Area, Fabric Mass and Bag Tare — free, with the formula and a worked example, at Textile School.