Choosing the right trash bag size is important for both household waste and commercial waste collection. A bag that is too small can tear or slip into the bin, while a bag that is too large wastes material and increases cost.
This guide explains standard trash bag sizes, dimensions, and gallon-to-liter conversions, helping buyers choose the correct bag size for kitchen bins, commercial bins, and wheelie bins.
As a professional compostable bag manufacturer in China, ORIZON supplies a full range of compostable trash bags for global B2B buyers, including distributors, wholesalers, and private label brands.
Trash Bag Sizes Chart
The table below shows some of the most common trash bag sizes used in household, commercial, and municipal waste systems.
| Trash Bag Size | Liter Equivalent | Typical Use | Recommended Product Page |
|---|---|---|---|
| 8 gallon | 30L | Small kitchen bins | 8 Gallon Trash Bags |
| 13 gallon | 50L | Standard kitchen trash cans | 13 Gallon Trash Bags |
| 30 gallon | 114L | Large indoor bins | 30 Gallon Trash Bags |
| 33 gallon | 125L | Commercial waste bins | 33 Gallon Trash Bags |
| 45 gallon | 170L | Heavy-duty and contractor waste | 45 Gallon Trash Bags |
| 120L | ≈32 gallon | Commercial bin liners | 120L Bin Liners |
| 240L | ≈63 gallon | Wheelie bin liners | 240L Wheelie Bin Liners |
This chart is especially useful for buyers comparing trash bag sizes in gallons and liters, since different regions use different measurement systems.
For example:
33 gallon bags equal about 125 liters, often used for large outdoor bins.
13 gallon trash bags are about 50 liters and commonly used for kitchen bins.
Why Trash Bag Size Matters
Choosing the correct trash bag size reduces leaks, tearing, and bag slipping.
A bag that is too small tears easily and won’t tie properly.
A bag that is too large wastes material and increases cost.
For compostable trash bags, fit matters even more because tight fits and overfilling can increase break risk in wet waste use.
Standard Trash Bag Sizes and Their Common Uses
Trash bags are usually selected based on bin capacity, waste type, and application environment. Although there is no single universal size standard, several capacities are widely used across different markets.
Small trash bag sizes
Small trash bags are commonly used for bathroom bins, office desk bins, and small countertop waste containers. Sizes in this category usually range from 3 gallon to 8 gallon.
Typical sizes include:
- 3 gallon
- 5 gallon
- 8 gallon
For compact kitchen or office bins, see our 8 Gallon Trash Bags.
Standard kitchen trash bag size
The most common standard kitchen trash bag size is 13 gallon, which corresponds to about 50 liters.
This size is widely used in household kitchens, food waste bins, and indoor waste collection systems.
For kitchen and food waste use, see our 13 Gallon Trash Bags.
Large trash bag sizes
Large trash bags are commonly used in commercial environments such as restaurants, offices, schools, and public facilities.
Typical large sizes include:
- 45 gallon trash bags
- 30 gallon trash bags
- 33 gallon trash bags
For larger capacity applications, explore our 30 Gallon Trash Bags , 33 Gallon Trash Bags and 45 Gallon Trash Bags .
Bin liners for commercial and municipal systems
In European and Australian markets, trash bag sizes are often listed in liters instead of gallons.
Among the most common commercial sizes are 120L bin liners and 240L wheelie bin liners.
For these systems, browse our 120L Bin Liners and 240L Wheelie Bin Liners.
Trash Bag Sizes in Gallons and Liters
Many buyers search for trash bag sizes in either gallons or liters. Understanding the conversion helps international buyers compare specifications more accurately.
Trash bags are usually labeled in gallons in the United States and liters in Europe and Australia.
The conversion is simple:
1 gallon = 3.785 liters.
Here are some of the most common conversions:
| Gallon Size | Liter Equivalent |
|---|---|
| 3 gallon | 11L |
| 5 gallon | 19L |
| 8 gallon | 30L |
| 13 gallon | 50L |
| 30 gallon | 114L |
| 33 gallon | 125L |
| 45 gallon | 170L |
| 63 gallon | 240L |
This gallon-to-liter reference is especially useful for buyers comparing garbage bag sizes, bin bag sizes, and bin liner size guides across different countries.
For example:
- 8 Gallon Trash Bags are roughly equivalent to 30L bin liners
- 13 Gallon Trash Bags are roughly equivalent to 50L bin liners
- 30 Gallon Trash Bags are roughly equivalent to 114L liners
- 33 Gallon Trash Bags are roughly equivalent to 125L liners
- 45 Gallon Trash Bags are roughly equivalent to 170L liners
- 240L Wheelie Bin Liners are roughly equivalent to 63 gallon liners
How to Measure the Right Trash Bag Size
If you are not sure what size trash bag you need, the easiest method is to measure the bin directly.
Step 1: Measure the bin width or diameter
For round bins, measure the diameter.
For rectangular bins, measure the width and depth.
Step 2: Measure the bin height
Measure from the bottom of the bin to the top rim.
Step 3: Add extra length for overhang
A trash bag should extend above the rim so it can fold over securely. In most cases, adding several inches of extra height helps improve fit.
Step 4: Match the waste type to the bag thickness
Light indoor waste may require a thinner bag, while food waste, outdoor waste, or contractor waste may require a thicker liner.
This is one of the most practical ways to answer questions such as:
- how to choose the right type of bin bag
- what size trash bag do I need
- how to measure garbage bag size
- what size bin bag do I need
Trash Bag Size Calculator: Find the Right Bag for Your Bin
If you are unsure what size trash bag fits your bin, you can estimate the correct size using a simple calculation method.
Step 1: Measure the Bin Opening
Measure the width and depth of your trash can.
Example:
- Width: 12 inches
- Depth: 10 inches
Add them together and multiply by two.
(Width + Depth) × 2 = bag circumference
Example:
(12 + 10) × 2 = 44 inches
This gives the approximate bag width needed.
Step 2: Measure the Bin Height
Next measure the height of the trash can from bottom to rim.
Example:
Height = 22 inches
Add about 3–6 inches to allow the bag to fold over the rim.
Recommended bag height:
22 + 4 = 26 inches
Step 3: Choose the Closest Trash Bag Size
Now match the calculated dimensions with the closest standard bag size.
Example:
| Bin Size | Recommended Bag |
|---|---|
| Small bin | 8 gallon trash bags |
| Kitchen bin | 13 gallon trash bags |
| Large indoor bin | 30 gallon trash bags |
| Commercial bin | 33 gallon trash bags |
| Heavy waste | 45 gallon trash bags |
You can compare these sizes in our trash bag sizes chart above.
For Square or Rectangular Bins
- Measure the width and depth of the bin opening
- Add width + depth, then divide by 2 → bag width
- Measure the bin height
- Add 5–10 cm for overhang and tying
For Round Bins
- Measure the diameter of the bin opening
- Diameter × 3.14 ≈ circumference
- Circumference ÷ 2 → bag width
- Bin height + overhang = bag length
Correct measurement reduces leakage and prevents premature tearing.
Trash Bag Size Guide by Use Case
Different waste environments require different bag capacities. Below are some common use cases.
Bathroom and office bins
Small bins in bathrooms, bedrooms, and offices usually need small trash bags. These are often used for light waste and low daily volume.
Kitchen trash cans
Kitchen bins usually require medium-capacity bags. In many homes and food service environments, 13 gallon trash bags are considered the standard size.
For standard kitchen waste collection, view our 13 Gallon Trash Bags .
Large indoor commercial bins
Commercial kitchens, offices, schools, and facility management systems often use 30 gallon or 33 gallon bags.
For these applications, see our 30 Gallon Trash Bags and 33 Gallon Trash Bags.
Heavy-duty and contractor waste
Landscaping debris, construction cleanup, and outdoor facility waste often require 45 gallon trash bags with stronger film performance.
For heavy-duty use, explore our 45 Gallon Trash Bags.
Wheelie bins and municipal collection
Large outdoor bins and curbside systems commonly use 120L and 240L liners.
For these applications, browse our 120L Bin Liners and 240L Wheelie Bin Liners .
Tip: Bag height and overhang matter more than volume labels alone. A slightly taller bag helps tying and reduces slipping.
Related reading: Best Compostable Trash Bags (2026) — how sizing and thickness affect performance in wet waste use.
Trash Bag Sizes for Commercial Buyers
For commercial buyers, selecting the correct trash bag size is important for operational efficiency and waste management systems.
Different industries typically use different bag capacities.
Restaurants and food service
Restaurants and commercial kitchens usually use 13 gallon trash bags for food waste bins.
For these applications, see our 13 gallon trash bags
Facility management and office buildings
Commercial buildings and public facilities often use:
- 30 gallon trash bags
- 33 gallon trash bags
Explore our sizes: 30 Gallon Trash Bags and 33 Gallon Trash Bags
Contractor and outdoor waste
Contractors and landscaping companies usually require heavy-duty bags.
Typical size: 45 Gallon Trash Bags
Municipal waste collection
Municipal waste systems often use large outdoor bins such as wheelie bins.
Common liner sizes include: 120L Bin Liners and 240L Wheelie Bin Liners
Common Compostable Trash Bag Sizes We Manufacture
As a Chinese compostable bag manufacturer serving global B2B buyers, ORIZON produces a full range of compostable trash bags and bin liners for different waste systems.
Our most common sizes include:
- 8 Gallon Trash Bags for small kitchen bins
- 13 Gallon Trash Bags for standard kitchen trash and food waste
- 30 Gallon Trash Bags for large indoor bins
- 33 Gallon Trash Bags for commercial waste bins
- 45 Gallon Trash Bags for heavy-duty and contractor waste
- 120L Bin Liners for commercial bin systems
- 240L Wheelie Bin Liners for municipal and outdoor collection systems
Our factory features:
- 20,000㎡ production facility
- 16 automated production lines
- 500 tons monthly capacity
We support OEM manufacturing for distributors, wholesalers, and private label brands worldwide.
FAQ About Trash Bag Sizes
What is the standard trash bag size?
The standard trash bag size for kitchen use is usually 13 gallon, which is about 50 liters.
What size trash bag fits a kitchen bin?
That depends on the capacity of the kitchen bin. Many standard kitchen bins use 13 gallon trash bags, while smaller kitchen bins may use 8 gallon trash bags.
How do I know what size trash bag I need?
Measure the bin width, depth, and height, then choose a bag with enough capacity and extra height to fit over the rim.
What is the difference between gallon and liter trash bag sizes?
Gallons are more commonly used in the United States, while liters are more common in Europe and Australia. For example, 13 gallon is about 50L, and 45 gallon is about 170L.
What size trash bag is used for wheelie bins?
Wheelie bins commonly use 120L or 240L bin liners, depending on bin capacity.
Looking for Compostable Trash Bags in Standard Sizes?
ORIZON is a professional compostable bag manufacturer in China supplying global B2B buyers with certified compostable trash bags, shopping bags, produce bags, mailing bags, garment bags, and dog poop bags.
If you are sourcing compostable trash bags in standard sizes for wholesale, OEM, or private label projects, contact our team for product recommendations and factory pricing.
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