Bagged route
14 bags
2 cu ft mulch bags
Good for small beds, color matching, and pickup trips. Compare the calculated bag count against pallet and vehicle limits.
Mulch calculator
Mulch calculator for bags, cubic yards, and bulk orders.
Enter bed dimensions and depth to estimate mulch volume, 2 cu ft bags, 3 cu ft bags, and a bulk-yard planning number before you shop.
Quick mulch answers
Common bed sizes
100 sq ft at 3 in
1.02 yd³
14 two-cu-ft bags
10 three-cu-ft bags
250 sq ft at 3 in
2.55 yd³
35 two-cu-ft bags
23 three-cu-ft bags
500 sq ft at 2 in
3.40 yd³
46 two-cu-ft bags
31 three-cu-ft bags
Depth note
A light refresh may only need 1-2 inches if old mulch is still present. New beds often use about 3 inches. Avoid piling mulch against trunks or siding.
Shopping list
Compare bagged and bulk mulch
Bag counts update from the calculator. Use store links as a starting point, then confirm color, bag size, pickup, delivery, and local stock.
Large bags
14 bags
3 cu ft mulch bags
Often useful when the store carries larger bags and you want fewer total bags to move.
Bulk route
14
Bulk mulch delivery
For larger projects, compare bagged totals against local bulk-yard pricing, delivery fees, and driveway drop-off rules.
Optional tools
Edging, rake, and wheelbarrow
Large mulch jobs are easier with edging, a rake, gloves, and a wheelbarrow or cart.
Formula shown
How mulch estimates work
Bed volume
length ft x width ft x depth in / 12
Cubic yards
cubic yards = cubic feet / 27
Bag counts
bags = ceil(cubic feet with allowance / bag size)
Sources
- Home Depot Mulch and Top Soil Calculator — retailer calculator for length x width x depth and bag-size planning
- Lowe's Mulch and Soil Calculator — retailer estimating flow for mulch and soil coverage
- Iowa State University Extension mulch guide — mulch depth depends on material, soil, climate, and use case
Reviewed for estimating accuracy
Last updated: June 21, 2026
Estimate only.
This calculator is not a quote. Verify product yield, price, delivery minimums, and local conditions with your supplier or contractor before buying materials.
FAQ
Mulch calculator questions
Quick answers for depth, bags vs bulk, waste allowance, and when this math should become a different material calculator.
How much mulch do I need? + -
Multiply bed length by width, multiply by mulch depth in feet, then divide by 27 for cubic yards. This calculator also converts the same volume into 2 cu ft and 3 cu ft bag counts.
How deep should mulch be? + -
Many home landscape beds use about 2 to 3 inches for refresh work and up to 3 to 4 inches for coarser mulch or new beds. Keep mulch pulled back from trunks, stems, siding, and foundations.
Should I buy mulch in bags or bulk? + -
Bags are easier for small beds, color matching, and pickup. Bulk mulch can make sense for larger yards, but delivery fees, minimums, and driveway drop-off rules matter.
Does this mulch calculator include waste? + -
Yes. It defaults to a 10% extra allowance for bed edges, settling, uneven ground, and measuring variation. You can type a custom percentage.
Can I use this for topsoil or compost? + -
The volume math is similar, but bag sizes, density, and use cases differ. Use this page for mulch planning first; topsoil and compost should become their own pages.