How Big Is a 20 Gallon Trash Can? | Real Dimensions

A 20-gallon trash can holds about 2.67 cubic feet of waste, but its physical size varies widely by shape and brand.

If you’re picturing a single standard size, that’s the first mistake. A “20 gallon” label tells you the capacity — roughly 75.7 liters — not the footprint. Whether you’re fitting one under a kitchen counter, in an office corner, or in a garage, the width, depth, and height matter just as much as the volume. Two bins can both hold 20 gallons and look nothing alike in person.

Here’s how the capacity breaks down: 20 U.S. gallons equals about 2.67 cubic feet or 75.7 liters. Some manufacturers round that metric label — Glad’s 20-gallon can, for instance, lists itself as 74L. It’s the same capacity, just a simplified number for international packaging.

Why Shape Changes the Actual Size

Manufacturers build 20-gallon bins in round, square, and tapered profiles, and each one claims a different footprint. A tall, narrow round can is common in offices; a wide, low rectangular can fits under a counter; a tapered bin takes up less floor space near the top but needs room for its base. The listed dimensions, not the gallon rating, tell you what you’re really working with.

Round cans dominate retail shelves. A typical round 20-gallon bin runs about 19.5 inches in diameter and stands 27 to 29 inches tall. Rectangular models are slightly more compact in depth but wider side to side. The only way to know if it fits your spot is to measure the space and compare it against the product’s exact dimensions.

Real 20-Gallon Examples Compared

Two well-known commercial models show just how much the label can hide:

The Rubbermaid BRUTE sits at about 23.7 inches tall and is relatively wide, built for restaurants, offices, warehouses, and other commercial spaces. Uline’s metal can stretches to 33 inches — nearly ten inches taller — despite holding the same 20 gallons. If you bought one without measuring, you’d be in for a surprise.

Liner Size Is Not the Same as Capacity

Don’t assume a 20-gallon can takes a 20-gallon bag. Uline lists a separate liner size for its 20-gallon can — 17.5 inches wide by 23.25 inches tall — which differs from the can’s own dimensions. Liner sizing accounts for how the bag drapes over the rim, so it’s almost always listed separately from the bin’s capacity.

Check both numbers before buying liners. A bag labeled for a 20-gallon trash can should fit, but the tightest fit depends on the can’s exact height and rim width, not just its volume.

What to Measure Before Buying

Skip the guesswork and take three quick measurements where the can will live: width, depth, and height. If it goes under a counter, verify the clearance above the floor to the underside of the countertop. If it sits in a doorway or cabinet, check the base width, since tapered cans may not fit through narrow openings even when the top seems fine.

Also confirm whether the listed height includes the lid. Some manufacturers state that their product dimensions cover the can and lid together; others measure only the body. A lid adds anywhere from one to three inches, and that gap matters in tight spaces. If you’re comparing a few models side by side, the best 20-gallon plastic trash can roundup breaks down the top contenders by footprint and fit.

For a mid-size home or office bin, a 20-gallon can handles a household kitchen’s daily waste or a busy home office’s recyclables. Just remember the size question has no single answer — the dimensions on the box are the only truth that matters.