Bean bag filling is measured in cubic feet of volume, and most top-ups need 15–20% of the original fill, while a 10-cubic-foot adult chair takes about 2 cubic feet of refill beads.
For the full breakdown, see our best Bean Bag Filler guide.
A tired bean bag that still holds its shape needs less filler than the package label suggests. The sack sizes sold online look huge next to the chair, and the number printed on your old cover rarely matches what the cushion actually holds. Get the volume right, though, and the chair feels new again for the price of one bag.
The figures below come from published manufacturer guidance and a fill-calculator method, and they split cleanly into three jobs: a light top-up, a substantial refresh, and a completely empty cover.
How Many Cubic Feet Of Filler Does A Bean Bag Hold?
Product examples run from about 4 cubic feet for a small chair to roughly 10 cubic feet for a large adult bag, and those numbers are specific to each cover rather than a universal rule. Comfy Bean lists 6 cubic feet for its standard chair and 10 cubic feet for its lounger, which shows how fast capacity climbs with size.
The honest answer is that external dimensions overstate the usable interior. A bean bag is flexible fabric, so measuring the outside gives you a starting estimate only. If the manufacturer printed the original fill requirement on the tag or product page, treat that number as the answer and skip the math entirely.
Table: Filler Amounts By Job And Chair Size
Match your situation to a row, then add beads gradually and sit in the chair before pouring the rest.
| Job Or Chair Size | Approximate Filler |
|---|---|
| Light top-up on a usable chair | 15–20% of original fill |
| Small refill sack | 2 cubic feet |
| Small chair | About 4 cubic feet |
| Medium chair | About 6 cubic feet |
| Comfy Bean chair | 6 cubic feet |
| Large adult chair | About 10 cubic feet |
| Comfy Bean lounger | 10 cubic feet |
One manufacturer’s large chair example makes the top-up math concrete: a 10-cubic-foot cover takes a 2-cubic-foot refill to feel full again. That 20% figure is a sensible ceiling for a chair that has flattened but not collapsed.
How Do You Calculate The Fill Volume Yourself?
Empty covers get measured, then converted to cubic feet, and the formula depends on whether the cover is boxy or round. Bean Products’ fill calculator accepts diameter and height for round forms, and width, length, and height for everything else.
For a rectangular cover, multiply width, length, and height in inches, then divide by 1,728 to get cubic feet. A round cover uses pi times the radius squared times the height. The calculator’s own allowance starts around 40% of measured volume and can be adjusted, where 100% equals the measured volume and 200% represents loose fill at twice that volume before compression.
- Enter the empty cover’s real dimensions, never the filled chair’s footprint.
- Do not type a manufacturer’s published fill quantity into the volume field, because that figure is the answer, not the container size.
- Treat every result as a starting point, then adjust upward in small pours.
How Do You Choose Between Beads, Foam, And Refill Sacks?
Polystyrene beads are the standard loose fill for bean bags and large cushions, and they are sold by cubic volume in sacks that are commonly 2 cubic feet each.
Foam-filled bags are a separate design and take replacement foam chunks or shredded foam, not beads. Check that the cover has a working zippered opening, and match the material to the original fill before buying. Shoppers comparing brands and bead quality can scan a tested bean bag filler roundup before ordering, since price per cubic foot varies widely.
What Goes Wrong When You Refill A Bean Bag?
Most failures come from buying by weight, overfilling, or spilling beads everywhere, and each one is preventable in a few minutes. Loose beads are small parts and a choking hazard, and supplier warnings state they are not suitable for children under 3 years, so keep kids and pets clear during the pour.
- Measure the empty cover or find the original fill requirement.
- Pick the right material and calculate a starting volume.
- Open the cover over a sheet, ideally with a second person holding the sack.
- Close the inner liner and outer cover securely before sitting down.
- Test the chair, then add fill in small batches until it supports you.
A chair that feels stiff after refilling usually has too much fill, and scooping some back out is normal. When the cover zips closed, the liner sits flat, and you sink in without hitting the floor, the job is done.
Lovesac’s filling guide and Great Bean Bags’ walkthrough both stress the same point: refill in stages rather than all at once. Full instructions from the Lovesac bean bag filling guide confirm that incremental pouring prevents the mess and lumpy settling that comes from dumping a whole sack at once.
FAQs
Is It Cheaper To Buy Beads By Weight Or Volume?
Volume is the only figure that maps to your chair’s capacity, so buy by cubic feet. Comparing price per cubic foot across brands gives you a fair read on value.
Can I Mix Shredded Foam With Polystyrene Beads?
Mixing the two produces an uneven chair, because foam compresses and beads shift. A foam-filled bag should get replacement foam, and a bead-filled bag should get beads. Check what the original cover came with before ordering anything, since the inner liner design differs between the two types.
How Full Should A Bean Bag Be For Sitting?
Fill it until you sink in a few inches without reaching the floor, which usually means slightly less than the cover’s full capacity. Leave the beads loose enough to shift under you. A chair packed to the zipper feels like a rock and defeats the point of owning one.
References & Sources
- Lovesac. “How to Fill a Bean Bag Chair” Manufacturer guidance on refill amounts and incremental filling.
- Bean Products. “Fill Calculators” Volume formula inputs and the 40%/100%/200% allowance scale.
- Great Bean Bags. “How to Fill a Bean Bag” Practical pour sequence and chair-size examples.