Garbage Bag Size Calculator

Using the Garbage Bag Size Calculator ensures you never again buy liners that are too small to reach the bottom or too narrow to fit over the rim of your trash can. Follow these steps to find the perfect fit:

Step 1: Identify the shape of your trash can (Circular, Square, or Rectangular).

Step 2: Measure the physical dimensions of the can using a tape measure. - For Circular cans: Measure the Diameter (width across the top) and the Height. - For Rectangular/Square cans: Measure the Width, the Depth (length), and the Height.

Step 3: Enter these measurements into the corresponding fields in the calculator.

Step 4: Select your desired Overhang. This is how much of the bag you want to fold over the top rim to keep it from sliding down. A standard overhang is 3 to 4 inches.

Step 5: Click "Calculate."

Step 6: Review the output. The calculator will provide the minimum required Bag Width (when flat) and Bag Height. Use these dimensions to match against the sizing listed on the back of garbage bag boxes in the store.

Garbage bag sizing is based on geometry, converting a 3D container volume into a 2D flat plastic sheet dimension.

For Rectangular Cans: - Bag Width = (Can Width + Can Depth) - Bag Height = Can Height + (Smallest Side ÷ 2) + Overhang Adding half of the smallest side ensures the bag has enough material to form a flat bottom inside the can.

For Circular Cans: - Bag Width = (Circumference ÷ 2) = (Diameter × 3.14) ÷ 2 - Bag Height = Can Height + (Diameter ÷ 2) + Overhang

Example: A circular can with a 12-inch diameter and 20-inch height (4-inch overhang). Bag Width = (12 × 3.14) ÷ 2 = 18.84 inches. Bag Height = 20 + (12 ÷ 2) + 4 = 30 inches. You should look for bags that are at least 19 inches wide and 30 inches tall.

The Garbage Bag Size Calculator is a practical tool designed to eliminate the common frustration of 'bin-liner fail'. Most people buy bags based purely on 'Gallon' capacity (e.g., 13-gallon bags), but this is a measurement of volume, not shape. A 13-gallon bag designed for a tall, skinny kitchen can will not fit a short, wide 13-gallon office bin. By calculating the required flat width and height based on the specific geometry of your container, this tool ensures the bag fits snugly over the rim and reaches the floor of the can, preventing the messy collapse of the bag when heavy items are thrown inside. This also helps reduce plastic waste by ensuring you don't buy bags that are unnecessarily oversized for your specific trash can.