Leaf Mould Calculator — Estimate Leaf Mould Yield
Calculate how much leaf mould you can make from collected autumn leaves.
How We Calculate This
Leaves reduce dramatically as they decompose into leaf mould — typically to 15-25% of their original volume.
Oak leaves: ~15% yield in 18 months. Beech and mixed: ~20% yield in 12 months. Conifers: ~25% yield in 24 months (slower decomposition but less volume loss).
Bin size should be at least 10% larger than the total leaf volume to allow for moisture and air circulation.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.