Leaf Raking Bags Calculator
Estimate how many lawn-and-leaf bags you’ll fill from your yard size, the depth of fallen leaves and how much they compress when bagged.
How it works
Loose volume = area × (depth ÷ 12) · Packed = loose × compaction · Bags = ceil(packed ÷ bag capacity)
Fallen leaves are mostly air, so the trick is estimating how much they shrink when you stuff them into a bag. Start with the loose volume — the yard area times the leaf depth in feet — then apply a compaction factor: raked and packed leaves typically drop to 30–50% of their fluffy volume. Divide by a bag’s capacity (a standard 30-gallon paper leaf sack holds about 4 ft³) and round up. Mulching or shredding the leaves first packs them far tighter and cuts the bag count sharply.
Worked example
A 2,000 ft² yard under a 2-inch (0.167 ft) layer of leaves holds 2,000 × 0.167 ≈ 333 ft³ loose. At a 0.4 compaction factor that packs to about 133 ft³. Divided by 4 ft³ per bag, that is 34 bags — a real autumn afternoon’s work.
Frequently asked questions
How can I fill fewer bags?
Shred the leaves first. Running a mower with a bagger, or a dedicated leaf shredder, packs them 3–5 times tighter than whole leaves, so a job that took 30 bags might take 8. Shredded leaves also compost and mulch far better.
What compaction factor should I use?
Around 0.4 for hand-raked leaves stuffed into bags. Use 0.5 for a light stuff, and as low as 0.2 for shredded leaves that pack down densely. Dry, brittle leaves crush tighter than damp ones.
Do I have to bag leaves at all?
No. Mulch-mowing chops them into the lawn where they break down and feed the soil, and a leaf pile makes excellent compost. Bagging is mainly for kerbside collection or when the layer is too thick to mulch in place.
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This calculator is for educational purposes. Double-check important results before acting on them.