Bin Bag Size Calculator

Measure the inside of the bin at its widest points. For a round bin, measure the diameter and height. For a square or rectangular bin, measure the width, depth and height. The calculator converts those measurements into the minimum flat bag width and length.

No. Litre capacity is useful for comparison, but bins with the same capacity can have different shapes. Match the calculated flat width and bag length first, then use litres as a secondary guide.

A 10 cm overhang is a practical starting point for folding the liner over the rim. Increase it if you need additional material for tying, or reduce it when the bin has a liner retaining ring.

There is no single answer based on litres alone because tall, round and rectangular 50 litre bins have different openings. Measure the bin dimensions and choose a liner whose flat width and length meet or exceed the calculated minimums.

Yes. Choose the next available liner with both a flat width and length at least as large as the calculated result. A smaller liner may split, slip into the bin or fail to cover the base.