Trash Can Sizes in Gallons | How to Pick the Right Bin

Standard trash can sizes range from 3 gallons for a bathroom to 13 gallons for a kitchen and up to 96 gallons for residential curbside pickup, with specific dimensions and bag requirements for each size.

The standard US kitchen trash can holds 13 gallons — roughly 24 inches tall and 15 inches wide — designed to fit tall kitchen bags. Bathrooms, offices, garages, and curbside carts each use a completely different standard size. Get the size wrong and your bags sag, split, or never reach the rim.

Standard Trash Can Sizes by Room

Kitchen (10–13 gallons). The 13-gallon tall can measures about 24–26 inches tall, 15–16 inches wide, and 12–13 inches deep. A rectangular 13G can sits 24″ H × 16″ W × 13″ D; round versions run 27–30 inches high. For one or two people, a 10-gallon can works; families of three to five prefer 12–16 gallons.

Bathroom (1.5–3 gallons). A 3-gallon can is roughly 12 inches tall and 10 inches wide. Compact 4–6 gallon models run 12–16 inches tall for small spaces like guest baths. These use standard 4-gallon bathroom bags.

Office and Under-Sink (3–7 gallons). A 3-gallon wastebasket measures about 11″ L × 8″ W × 12″ H. Under-sink cans should max out at 12 inches in width. Use 4–6 gallon bags for smaller sizes.

Garage and Utility (20–32 gallons). These are the most common sizes for heavy-duty use;

Residential Curbside (64–96 gallons). A 64-gallon cart stands 41.75″ H × 24.25″ W × 31.5″ L and holds three to four tall kitchen bags, suited to households of three to four people. The 96-gallon version measures 44.5″ H × 27.25″ W × 35″ L and carries five to six bags for families of five to seven. Bear-resistant 64-gallon models exist for wildlife-prone regions. Confirm your local waste service accepts these sizes before purchasing.

How to Measure a Trash Can When the Label Is Missing

Check the obvious spots: back exterior a third of the way up from the bottom, or interior base. Markings say “13 GAL” or “50L.” If liters, multiply by 0.264 — 50L equals about 13.2 gallons.

For a rectangular can, measure height (H), width (W), and depth (D) in inches. Multiply: H × W × D = cubic inches. Divide by 231 (one gallon). Example: 20″ × 15″ × 10″ = 3,000 cubic inches. 3,000 ÷ 231 ≈ 12.99 gallons.

For a round can, measure height (H) and diameter (D). Radius is half the diameter. Use π × r² × H (3.14159) to get cubic inches, then divide by 231. Example: 3.14159 × 7² × 24 = 3,694 cubic inches. 3,694 ÷ 231 ≈ 15.99 gallons.

Always round up when buying bags. If your can measures 10.5 gallons, grab 13-gallon tall kitchen bags for a snug fit.

Bag Compatibility and Common Mistakes

The most frequent error: buying bags that exactly match the can’s volume. A 10–12 gallon can needs 13-gallon bags. An 18–22 gallon can needs 30-gallon bags. Using 4–5 gallon bathroom bags in a standard 13-gallon bin leaves the bag loose, tearing under weight. Ornate or tapered bins can hold 10–15 percent less than labeled due to wasted volume. When in doubt, size up. For under-sink areas, confirm width under 12 inches; office clearance is similar.

FAQs

What is the most common trash can size for a family kitchen?

Thirteen gallons is the US standard, fitting tall kitchen bags. Families with three or more often prefer 12–16 gallons for a full week without overflowing.

Can I use a 13-gallon bag in a 10-gallon trash can?

Yes, often recommended. The bag drapes over the rim and resists slipping better than a smaller bag.

What size trash can do I need for a garage?

Twenty to 32 gallons is standard.