A trash bag size chart only works if you measure the can first โ the calculator turns can shape and dimensions into the lay-flat width and length a liner actually needs, then the chart below maps it to stock sizes from 7 to 64+ gallons. Cases live on trash can liners.
How do you read a trash bag size chart?
Short answer: compute required width (half the circumference for round cans, length plus width for rectangular) and required length (height plus bottom reach plus 3-4" of overhang), then take the first stock size that covers both numbers โ the calculator does the math and the chart shows every standard cut.
Editor's pick โ 55-60 gallon liners, 2.1 mil
The size the default 44-gallon worked example actually lands on โ coverage beats label-gallon matching. Read the full listing.VIEW THE LISTING โ ย CHECK PRICE ON AMAZON โ
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Enter your trash can's measurements and waste type to get the liner width and length the math actually requires, the standard commercial liner size that covers it, and the film density and gauge (HDPE microns vs LLDPE mils) matched to what goes in the bag.
How the sizing math works
Width: a liner must reach around half the can's opening โ for round cans that's the circumference divided by two (ฯ ร diameter รท 2); for rectangular cans it's length plus width. Length: the bag must run the can's height, reach across the bottom (half the diameter or short side โ most flat-packed liners are flat- or star-sealed rather than gusseted), and leave 3โ4 inches folded over the rim so the load sits in the bag, not on the seam. A standard 44-gallon round receptacle (24" diameter, 31.5" tall) works out to 37.7" x 47.5" โ and the first stock cut that covers both numbers is the 38 x 58 "55-60 gallon" bag; the 40 x 46 "40-45 gallon" cut falls half an inch short on length, which is why the calculator sizes up.
Density does the real work. High-density (HDPE) film hauls office and paper waste with far less resin per bag but zippers open at punctures; low-density (LLDPE) stretches around edges. The full decode โ mils vs microns, LLDPE vs HDPE, and the standard-size chart โ is in our trash bag thickness & density guide. Browse everything in the can liner collection, and liquid-heavy failures belong to the spill control collection with a wet floor sign posted while you clean up.
Guidance for general and industrial waste only โ regulated medical, sharps, and hazardous waste have their own container rules. WC Safety participates in the Amazon Associates Program; product links may earn us a commission.
The trash can liner size chart (stock cuts)
| Lay-flat (W x L) | Sold as |
|---|---|
| 24 x 24" | 7-10 gallon |
| 24 x 33" | 12-16 gallon |
| 30 x 37" | 20-30 gallon |
| 33 x 39" | 31-33 gallon |
| 40 x 46" | 40-45 gallon |
| 38 x 58" | 55-60 gallon |
| 43 x 48" | 56 gallon glutton |
| 50 x 60" | 64+ gallon cart |
The calculator scans these cuts top-down and returns the first that covers both requirements, so it may skip a technically tighter fit in favor of guaranteed coverage.
Our methodology
Sizing math is the industry lay-flat convention (width = half circumference or length+width; length = height + bottom reach + overhang); the chart restates the eight stock cuts the calculator scans, which favor guaranteed coverage over tightest fit, and film/gauge pairings follow resin-type conventions, not brand claims. Authoritative duties live at OSHA regulations and exposure science at NIOSH. We hold no safety certification, and this tool is not a substitute for professional judgment.
Why trust this page
WC Safety is an independent review site with no products of its own โ nothing here is stocked, warehoused or shipped by us. Purchase links go to Amazon and earn an affiliate commission at no extra cost to you. This free tool is informational โ it supports, and never replaces, a written program, a hazard assessment, or evaluation by a qualified safety professional.
Frequently Asked Questions
What size trash bag for a 44 gallon can?
A standard 24"-diameter, 31.5"-tall round 44 needs about 37.7 x 47.5" of bag; the first stock cut covering both is the 38 x 58 sold as 55-60 gallon โ label gallons and can gallons are different systems.
What is a garbage bag size chart?
The same chart under another name โ lay-flat width by length mapped to nominal gallons; the table above covers 7-10 through 64+ gallon carts.
What do mil and micron ratings mean?
Thickness: LLDPE bags rate in mils (1.5-3.0 for heavy work), HDPE in microns (8-16 for office paper) โ film chemistry matters as much as the number, and the mil thickness reference guide linked above covers the decode.
HDPE or LLDPE liners?
HDPE uses less resin per bag for light, dry office waste but tears fast at punctures; LLDPE stretches around sharp and heavy loads โ the calculator pairs film to your waste type.
Why is my liner short even though the gallons match?
Because gallons describe capacity, not cut. A tall slim can needs more length than its gallons suggest โ measure height plus bottom reach plus overhang, which is exactly what the calculator computes.
What is a bin liner size guide?
The UK and commonwealth name for this chart โ the math and the lay-flat convention are identical; only the naming differs.
Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers publish, with the gaps in that record marked. Last reviewed July 2026.