Bean Bag Filling Calculator
Calculate the volume of filling (like EPS beads) needed to stuff a bean bag chair based on its dimensions.
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The Ultimate Guide to the Bean Bag Filling Calculator
Find out exactly how much filling you need to create a perfectly comfortable bean bag chair.
Whether you're making a new bean bag chair from scratch or reviving an old, flattened one, the most common question is: "How much filling do I need?" The Bean Bag Filling Calculator is designed to answer precisely that. It helps you estimate the volume of filling required based on the shape and dimensions of your bean bag, ensuring you buy the right amount and avoid waste or a half-empty chair.
The Formulas Behind the Calculation
The calculator uses standard geometric formulas to determine the volume of the bean bag. The result is typically given in cubic feet or liters, which are the most common units for purchasing bean bag filling.
For a Round (Cylinder) Bean Bag:
Volume = π × (Diameter / 2)² × Height
This formula calculates the volume of a cylinder. The radius is half the diameter. This shape is common for classic round or drum-shaped bean bags.
For a Rectangular (Slab) Bean Bag:
Volume = Length × Width × Height
This is the standard formula for the volume of a rectangular prism, suitable for large, mattress-style or couch-style bean bags.
Important Note: The calculator provides the total volume of the bean bag. For a comfortable, plush feel, it's recommended to fill the bean bag to about 80-90% of its total capacity. This allows the filling to shift and conform to your body. The calculator automatically adjusts for this, giving you a practical "Recommended Filling" amount.
Practical Example
Let's say you have a standard round bean bag chair with a diameter of 3 feet and a height of 2 feet.
- Shape: Round (Cylinder)
- Diameter: 3 feet
- Height: 2 feet
First, calculate the total volume using the cylinder formula:
Volume = 3.14159 × (3 ft / 2)² × 2 ft ≈ 14.14 cubic feet
Next, to get a comfortable fill, we take about 85% of this total volume:
Recommended Filling = 14.14 cubic feet × 0.85 ≈ 12 cubic feet
So, you would need to purchase approximately 12 cubic feet of filling for your bean bag. Since filling is often sold in bags of 2, 3.5, or 5 cubic feet, you can use this number to determine how many bags to buy.
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