Depth of leaves or clippings lying on the ground, loose.
How much you can pack it down. Dry leaves compress 40-60%; wet clippings barely at all.
Quantity estimate for planning and buying. Rates vary by variety, region and product — check the label on what you actually buy.
How many cubic feet is a 30 gallon yard waste bag?
A 30 gallon yard waste bag holds 4.01 cubic feet. It takes about 6.7 of them to hold a cubic yard of debris.
How many you actually need depends far more on compression than on volume. Dry crisp leaves pack down 40-60%, damp or matted leaves only 20-30%, and grass clippings barely at all — so the same pile can be 25 bags or 75.
A 30 gallon bag of dry leaves weighs 15-25 lb; the same bag of wet clippings can exceed 50 lb, which is past what many collection services will lift.
Compression is most of the answer
A 30 gallon paper lawn bag holds 4.01 cubic feet. Leaves lying 3 inches deep over a 50 × 40 ft lawn are 500 cubic feet loose, which is 125 bags if you funnel them in without packing — and about 75 if you compress them by 40%, which you will.
How much it compresses depends on what it is and how wet:
- Dry, crisp leaves: 40-60%. They crush easily and a shredder or mower pass roughly halves the volume again.
- Damp or matted leaves: 20-30%. Heavier and they resist packing.
- Grass clippings: 10-20%. Already dense and very heavy wet — a 30 gallon bag of wet clippings can exceed 50 lb, which is past what most collection services will lift.
- Twigs and prunings: essentially none, and they tear paper bags.
The cheaper answer is usually not to bag it
Worth saying plainly, because it saves both money and work:
- Mulch-mow the leaves. Run the mower over them two or three times and leave them on the lawn. Shredded leaf litter breaks down over winter and feeds the soil. This works well up to a moderate leaf fall — you need the grass still visible afterwards.
- Leaves are the best mulch you can get, free. Shredded leaves on beds do everything bark mulch does and add organic matter faster.
- Leaf mould. A wire bin of leaves left alone for a year or two makes the best soil conditioner there is, at no cost.
Bagging is for what is genuinely surplus, or where a local ordinance requires it.
| Container | Gallons | Cubic feet | Per cubic yard |
|---|---|---|---|
| 30 gal paper lawn bag | 30 | 4.01 | 6.7 |
| 39 gal plastic bag | 39 | 5.21 | 5.2 |
| 33 gal plastic bag | 33 | 4.41 | 6.1 |
| 20 gal paper bag | 20 | 2.67 | 10.1 |
| 96 gal wheeled cart | 96 | 12.83 | 2.1 |
| 64 gal wheeled cart | 64 | 8.56 | 3.2 |
Common questions
How many cubic feet is a 30 gallon yard waste bag?
4.01 cubic feet. A cubic yard of debris fills about 6.7 of them.
How many bags of leaves per 1,000 square feet?
At 3 inches deep and 40% compression, about 37 bags of 30 gallons. At 6 inches deep, about 75.
How much does a bag of leaves weigh?
Dry leaves, 15-25 lb for a 30 gallon bag. Wet leaves or grass clippings can exceed 50 lb, which is over the limit many collection services will handle.
Do I have to bag my leaves?
Usually not. Mulch-mowing them into the lawn, using shredded leaves as bed mulch, or composting them into leaf mould are all better for the soil and cost nothing. Check your local collection rules.