Bean Bag Filling Calculator - Calculator Academy

Enter the length, width, and height of your bean bag into the calculator to estimate the total number of 1 kg bags of bead filler needed to fill your bean bag (results vary by filler type, density, and desired firmness).

Bean Bag Filling Formula

The following formula is used to estimate how many 1 kg bags of bead filler are needed to fill a bean bag when you approximate the bean bag as a rectangular box and assume ~50,000 cm³ of EPS beads per 1 kg (bulk density ≈ 20 kg/m³). Actual results vary by filler type/density and how full/firm you want the bean bag.

B = L * W * H / 50,000

Where B is the estimated number of 1 kg bags needed to fill the bean bag
L is the length of the bean bag (cm)
W is the width of the bean bag (cm)
H is the height of the bean bag (cm)

To estimate the number of bags needed, multiply the length, width, and height in centimeters, then divide by 50,000. This divisor corresponds to assuming 1 kg of EPS bead filler occupies about 50,000 cm³ (about 50 L); adjust your estimate if your filler is denser/lighter or you plan to fill less than “full box” volume.

What is bean bag filler?

Bean bag filler is the material used to stuff a bean bag—commonly small expanded polystyrene (EPS) beads, but sometimes shredded foam or other fillings.

How to calculate how many bags of filler I need to fill my bean bag?

Example:

The following example outlines the steps needed to calculate the amount of bags of filler needed to fill a bean bag.

First, determine the length of the bean bag. In this case, the length is 60 cm.

Next, determine the height of the bean bag. For this example, the height is measured to be 35 cm.

Next, determine the width of the bean bag. This is measured to be 65 cm.

Finally, estimate the number of 1 kg bags of filler needed for the bean bag using the formula above:

B = L * W * H / 50,000

B = 60 × 65 × 35 / 50,000

B ≈ 2.73 (so about 3 bags of 1 kg filler, depending on filler type and desired firmness)