Mulch Calculator — Bags and Cubic Yards
Set your conditions — the recommendation updates instantly.
GardenSays
Buy 14 bags of mulch (2 cu ft) — or 1.02 cubic yards in bulk.
- Needed
- 25 cu ft
- Buy
- 14 × 2 cu ft
- Bulk
- 1.02 cu yd
Your 10×10 ft needs 25 cu ft of mulch (707.9 litres); with the 10% settling allowance, plan for 27.5 cu ft (778.7 L). At 1.02 cubic yards, get a bulk quote too and compare it against 14 bags with the delivery fee included — prices vary a lot by region.
Do this this week
- 1.Buy 14 × 2 cu ft bags — or 1.02 yd³ in bulk
- 2.Get a bulk quote too, and compare it with the delivery fee included
- 3.Fill level and even — the math assumes interior dimensions and uniform depth
Typical estimate · How we decide
Why
Extensions recommend 2-4 inches of organic mulch: enough to suppress weeds and hold moisture, shallow enough to let water and air through.
- The exact math says 12.5 bags — the recommendation rounds up and adds 10% because soil settles and measurements are never perfect.
- Bagged product typically costs 2-3× bulk per cubic foot once you pass about one cubic yard (our estimate from typical retail pricing).
When this doesn't apply
- Material settles: a raised bed fill can drop 10-20% in the first season — that's what the buffer covers.
- L-shaped or irregular areas: split into rectangles, calculate each, and add the results (multi-area support is coming).
- Assumptions: interior dimensions, uniform depth, level fill; cost excludes tax and delivery.
How this was calculated
- 1. Area (rectangle)100 sq ft
10 ft × 10 ft
- 2. Volume25 cu ft
100 sq ft × 3/12 ft deep
- 3. Purchase buffer× 1.1 → 27.5 cu ftGardenSays estimate
Soil settles and beds are never perfectly measured — a 10% allowance avoids a second trip (our estimate; adjustable above)
- 4. In bags14 bagsCalculated result
27.5 cu ft ÷ 2 cu ft per bag = 13.8, rounded up to whole bags
- 5. In bulk1.02 cu ydCalculated result
27.5 cu ft ÷ 27 (bulk is sold by the cubic yard)
Data sources
- University of Minnesota Extension — Mulching the garden (checked 2026-07-15)
What changes this answer
Area shape
Length (ft)
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Width (ft)
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Depth (in)
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Bag size
Purchase buffer
Bag price (optional) ($)
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Every change updates the answer, the math, the weekly steps and the share link instantly.
People also ask
How many bags of mulch do I need?
Buy 14 bags (2 cu ft each) — a cubic yard equals 14 of these bags, so bulk beats bags past ~1 yard. Calculate yours →
How deep should mulch be?
Buy 14 bags of mulch (2 cu ft) — or 1.02 cubic yards in bulk. Calculate yours →
How much mulch is in a cubic yard?
Buy 14 bags (2 cu ft each) — a cubic yard equals 14 of these bags, so bulk beats bags past ~1 yard. Calculate yours →
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