How to Use Bean Bag Filler Calculator
The Bean Bag Filler Calculator estimates both volume and approximate shipping weight for common bean bag shapes. It is especially helpful when replacing compressed beads, building a DIY lounge chair, or choosing between EPS beads and shredded foam.
- Pick a shape — sphere, cube, cylinder or pear.
- Enter dimensions — diameter for spheres, length/width/height otherwise.
- Choose filler material — EPS beads, polystyrene, shredded foam or solid foam.
- Set fill level — light, standard or full firmness.
- Read volume and weight — total cubic feet, cubic meters, lb and kg.
Formula & Theory — Bean Bag Filler Calculator
The Bean Bag Filler Calculator first estimates the shell volume, then multiplies it by the selected fill ratio. The weight estimate uses typical loose-fill density, so the result is best for buying bags or boxes rather than predicting the final sitting feel exactly.
sphere V = 4/3 × π × r³
cube V = L × W × H
cylinder V = π × r² × H
pear V ≈ 0.7 × π × r² × H
buyVolume = V × fillLevel (0.65 / 0.85 / 1.0)
weight = buyVolume × density(material)| Fill level | Ratio used | Best for |
|---|---|---|
| Light | 65% | Soft floor cushions and kids seats |
| Standard | 85% | Everyday adult chairs |
| Full | 100% | Firmer support or oversized loungers |
Assumptions and Limits
Real bean bags are stitched, stretched and compressed, so the geometry is an approximation. EPS beads also settle over time, while shredded foam expands after unpacking. Buying 10–15% extra gives you room for top-ups without overfilling the liner on day one.
Use Cases for Bean Bag Filler Calculator
The Bean Bag Filler Calculator is useful for:
- Refills — Restore a flattened chair without guessing bag counts.
- DIY furniture — Plan foam or bead volume before cutting fabric panels.
- Material comparison — Estimate how much heavier shredded foam will be.
- Bulk orders — Scope lounge, classroom or co-working seating purchases.
For the most comfortable result, fill gradually, sit-test the chair, then add the remaining filler if it still feels loose.