What this calculator does
Bean bag filling works out filler needed for a bean bag chair from its filled dimensions, using the standard bead density. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaFiller mass = length × width × height × 20 kg/m³, the typical bulk density of expanded-polystyrene bean bag beads
The inputs explained
| Field | What to enter |
|---|---|
| Filled length (cm) | A number, measured in cm. Starts at 70. |
| Filled width (cm) | A number, measured in cm. Starts at 60. |
| Filled height (cm) | A number, measured in cm. Starts at 50. |
| Filler bag size (kg/bag) | A number, measured in kg/bag. Starts at 1. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with filled length
Every other input is held at the calculator’s starting values while filled length varies. Select any row to load that scenario into the calculator.