Bean Bag Filling Calculator

Estimate the filling (foam/beans) a bean bag needs.

How the Math Works

The Bean Bag Filling Calculator uses a simple yet effective formula to estimate the volume of filling needed: filling in cubic feet is approximately equal to 0.3 multiplied by the diameter of the bean bag in inches. This formula is derived from empirical observations of typical bean bag construction, where the filling volume is roughly 30% of the diameter measurement. For example, a bean bag with a 40-inch diameter would require approximately 0.3 × 40 = 12 cubic feet of filling. The 0.3 factor accounts for the spherical shape of the filled bag and the space between individual bean bag chunks.

Practical Applications

To use this calculator practically, first measure the diameter of your bean bag cover from one side to the other using a tape measure. Ensure the bag is laid flat or stretched to its maximum dimensions for an accurate measurement. Multiply the diameter in inches by 0.3 to determine the approximate cubic feet of filling needed. You can then purchase loose-fill beans, foam pellets, or other suitable materials based on this volume. It's recommended to buy slightly extra filling in case of settling or future replacement needs.

Day-to-Day Use

This calculator simplifies a common household challenge: properly filling bean bag chairs without guesswork. Instead of dumping bags of filling into a cover and hoping for the best, you can now purchase the exact amount needed, saving both money and time. This is particularly useful when replacing old fillings, buying new bean bags, or creating custom seating for living rooms, dorm rooms, or play areas. The calculator also helps you compare prices of different filling materials by giving you a standardized volume to work with, making you a more informed consumer.

Worked example

36 in → ~11 ft³.

FAQ