Mulch calculator
Estimate new bed or top-up mulch depth, cubic yards, bag count, bulk-vs-bagged buying choice, material range, and spreading labor.
Home Project Estimates
Mulch calculator
May 15, 2026
2 beds at 20 ft by 6 ft, 3.0 in deep.
Shopping list
- shredded hardwood mulch, bulk2.3 cu yd
- 2 cu ft bags30 bags
- Edging cleanup, rake, wheelbarrow, glovesAs needed
Assumptions
- 27 cu ft per cubic yard
- 3.0 in target depth
- Bulk-vs-bagged choice compares material ranges before delivery fees
- Delivery fees and bed prep are not included
- U.S. near average; pricing data: U.S. near average pricing
Planning estimate only. Not a contractor quote, engineering advice, or permit review.
Calculator setup
2 beds at 20 ft by 6 ft, 3.0 in deep.
Shopping list
- shredded hardwood mulch, bulk2.3 cu yd
- 2 cu ft bags30 bags
- Edging cleanup, rake, wheelbarrow, glovesAs needed
Take this estimate with you
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Shared links include the current inputs and unit setting. Saved estimates stay local unless you enable Google Drive sync.
Assumptions in this estimate
- 27 cu ft per cubic yard
- 3.0 in target depth
- Bulk-vs-bagged choice compares material ranges before delivery fees
- Delivery fees and bed prep are not included
- U.S. near average; pricing data: U.S. near average pricing
No saved estimates yet.
What this calculator estimates
This mulch calculator starts from the measurements and options you enter, then estimates material quantity, waste, cost ranges, labor ranges, and a starter shopping list.
Results adapt to the selected region and unit settings, so the estimate is not locked to one market or measurement system.
Report confusing results, missing options, or assumptions that look off.
How this is calculated
- Bed area is length x width x number of beds.
- New bed volume is bed area x mulch depth converted from inches to feet.
- Top-up mode subtracts existing mulch depth from the target depth before estimating new material.
- Cubic yards divide cubic feet by 27 and round up to the nearest tenth.
- Bulk-vs-bagged guidance compares material ranges before delivery fees or minimum orders.
Assumption register
| Item | Low | Typical | High | Source |
|---|---|---|---|---|
| Volume conversion | 27 | 27 | 27 | Standard U.S. volume conversion Checked 2026-06-21 · high confidence |
| Typical mulch depth | 2 | 3 | 4 | USU Extension mulch application guidance Checked 2026-06-21 · medium confidence |
| Bulk mulch price | 25 | 65 | 240 | Homewyse mulch installed benchmark Checked 2026-06-21 · low confidence |
Last reviewed: May 15, 2026. These values are planning defaults, not live prices.
Common mistakes
- Using too much mulch around trunks, stems, siding, or weep holes.
- Refreshing a bed from the full target depth instead of only the missing top-up depth.
- Forgetting delivery minimums for bulk mulch.
- Comparing bagged and bulk prices without converting both to volume.
FAQ
How deep should mulch be?
Two to three inches is common for many beds. Use less near trunks and stems.
When should you use top-up mode?
Use top-up mode when the bed already has mulch and you only need to bring it back to the target finished depth.
Is bulk cheaper than bags?
Often, but delivery fees and minimum orders can change the better option.
Does this include bed prep?
No. Weed removal, edging, fabric, and soil amendments are separate.
Can this mulch calculator estimate cost by region?
Yes. The calculator uses the selected region and unit settings to adapt quantities, cost ranges, labor ranges, and assumptions.
How should you use the result before buying materials?
Use the result as a planning estimate, then compare it with a current supplier cart, contractor quote, or local project conditions before committing.
Limitations
This calculator estimates rectangular bed volume and simple top-up depth. Curved beds, plant spacing, delivery fees, minimum orders, and prep work need separate review.
This estimate is for planning only. It is not a contractor quote, engineering advice, or permit review.
Next step
Measure once more, compare the result with a real quote or shopping cart, and review the assumptions before buying materials.
Read the how much mulch do I need guide
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