Mulch Calculator
Calculate cubic yards, bag count, and cost for any bed size and mulch type.
Area Dimensions
Quick start
Front Yard Beds
3"
Fresh coverage for common curb-facing beds. Adjust the numbers below for your exact bed.
Natural, decomposes slowly | garden range 2"-3" | $37.5/yd³
Ready to calculate
Enter your area dimensions
Last updated June 9, 2026 by our expert review team
Mulch Types & Pricing
Hardwood Mulch
$37.5/yd³
2-3" deep | Natural, decomposes slowly
Cedar Mulch
$47.5/yd³
2-3" deep | Insect-resistant, aromatic
Pine Bark
$42.5/yd³
2-3" deep | Long-lasting, attractive
Rubber Mulch
$100/yd³
1-2" deep | Permanent, no decay
Dyed Mulch
$42.5/yd³
2-3" deep | Red/black/brown colors
Expert Contributors
Ruth Wairimu
Landscape Architect
Landscape architect with 9+ years of experience, AAK member, IFLA climate activist, and founder of Bloomwell.
See full profileHawkin
Certified Cost & Estimating Professional
AACE-certified estimator working with 20+ insulation companies including the two largest franchises in America.
See full profileUpdated June 2026
How we verify our calculatorsPrice per Cubic Yard by Type
$/yd³Average bulk material prices before local delivery fees. Bagged mulch often costs 2 to 3 times more per cubic yard.
Pro Tips
Use 2 to 4 inches for weed suppression. A thin dusting looks fresh for a week, but it will not block much light.
Keep mulch off trunks and stems. Leave 3 to 5 inches around young woody plants and a wider clear ring around mature trees.
Refresh existing beds by measuring the old layer first. Add only enough to bring the total depth back to 2 to 3 inches.
Buy bulk when the project passes 2 to 3 cubic yards or about 30 to 40 standard bags. Delivery fees can still change the winner.
Playground surfacing is different from garden mulch. CPSC guidance starts loose-fill rubber at 8 inches installed and wood mulch at 12 inches installed.
Rubber mulch lasts a long time, but it is not a soil-builder. For play areas, compare dedicated options in the rubber mulch calculator.
For slopes and natural-looking beds, pine straw can stay put better than chunky bark.
Planning a new lawn? Use our sod calculator to estimate pallets and costs for sod installation.
Building raised beds? Our raised bed soil calculator estimates soil mix, bags, and bulk delivery for any bed size.
Need soil under your mulch? Our soil calculator estimates topsoil, garden soil, and compost in cubic yards, tons, and bags.
How the Calculator Works
Measure the bed, choose a depth, and the calculator converts the volume into cubic yards for bulk orders and bags for store pickup.
The waste factor covers curved edges, settling, and the small losses that happen while moving mulch by wheelbarrow. Use more waste for slopes and play surfaces.
The cost comparison is a planning number. Local delivery fees, seasonal bag sales, and minimum bulk orders can change the final choice.
Formula
Rectangular: Length x Width x (Depth / 12) = Cubic Feet
Circular: π × Radius² × (Depth ÷ 12) = Cubic Feet
Cubic Feet ÷ 27 × (1 + Waste %) = Cubic Yards needed
Quick Reference
- 1 cubic yard covers
- ~162 sq ft @ 2"
- Bag size (typical)
- 2 cubic feet
- Recommended depth
- 2-3 inches
- Organic mulch price
- $30-55/yd³
- Rubber mulch price
- $80-120/yd³
Frequently Asked Questions About Mulch
How much mulch do I need?
Multiply area by depth, convert to cubic feet, then divide by 27 for cubic yards. Add 10% for curved beds and spreading loss.
How many bags of mulch in a yard?
One cubic yard is 27 cubic feet. That is 14 standard 2 cu ft bags or 9 large 3 cu ft bags.
How deep should mulch be?
For most landscape beds, 2 to 4 inches is the useful range. Refresh layers are thinner. Playground surfacing needs separate safety guidance.
Bulk or bagged, which is cheaper?
Bulk usually wins once the project reaches 2 to 3 cubic yards, but delivery fees and bag sales can move the break-even point.
How often should I replace mulch?
Hardwood and pine bark need annual top-up. Cedar lasts 2-3 years. Rubber mulch is essentially permanent.
Is cocoa mulch safe for dogs?
No. It contains theobromine, the same toxin in chocolate. Use cedar, pine bark, or rubber mulch if you have pets.
What type of mulch is best?
Hardwood ($30-45/yard) is the best all-rounder. Cedar adds insect resistance. Pine bark suits acid-loving plants. Use tested rubber surfacing for play areas.
Does mulch attract termites?
Mulch does not create termites, but it can hold moisture near wood. Keep mulch pulled back from foundations and siding.
Mulch Coverage Guide
| Depth | Coverage per Cubic Yard | Bags per 100 sq ft | Best For |
|---|---|---|---|
| 1" | 324 sq ft | 5 | Light refresh over existing mulch |
| 2" | 162 sq ft | 9 | Standard flower beds and gardens |
| 3" | 108 sq ft | 13 | Weed control and moisture retention |
| 4" | 81 sq ft | 17 | Heavy weed areas and tree rings |
| 8" | 41 sq ft | 34 | Loose-fill rubber playground starting depth |
Choosing a Mulch Type
| Type | Typical Price | Lasts | Best For | Watch Out For |
|---|---|---|---|---|
| Hardwood | $37.5/yd³ | 1 season | Everyday beds and borders | Can mat if applied too deep |
| Cedar | $47.5/yd³ | 2-3 seasons | Tree rings and ornamental beds | Strong scent when fresh |
| Pine Bark | $42.5/yd³ | 1-2 seasons | Acid-loving plants and natural beds | Large nuggets can float in heavy runoff |
| Dyed | $42.5/yd³ | 1-2 seasons | Color-matched front beds | Keep fresh dyed mulch off concrete until dry |
| Rubber | $100/yd³ | 10+ seasons | Play areas and permanent borders | Not for edible gardens or soil improvement |
Organic mulches improve the soil as they break down. Rubber is a surfacing material, so use it where long wear matters more than soil health.
Mulch Estimates for Common Projects
Small Flower Bed
8 x 4 ft, 2" deepBags usually make sense here. Measure the old mulch first if this is only a seasonal refresh.
Front Yard Flower Beds
20 x 10 ft, 3" deepThis is the point where a bulk quote is worth a call. Ask about delivery minimums and where the truck can dump.
Tree Ring
4 ft radius, 2" deepKeep mulch clear of the trunk and root flare. A wide, shallow ring is better than a thick mound.
Rubber Play Area
15 x 20 ft, 8" deepLoose-fill playground surfaces need containment, drainage, and maintenance. Use tested surfacing, not random landscape mulch.
Mulch Mistakes That Cost You Money
The 'mulch volcano' around trees
Pull mulch back 3-6 inches from trunks. Piling it against bark traps moisture and invites rot and rodent damage.
Applying too deep
More than 4 inches creates a water-repelling mat. Roots grow into the mulch instead of soil. Stick to 2-3 inches.
Using the wrong mulch for the spot
Pine bark floats (bad for slopes). Cocoa mulch is toxic to dogs. Dyed mulch bleeds onto concrete. Match type to conditions.
Mulching over old mulch without checking depth
Rake existing mulch first and measure depth. Only add enough to bring total back to 2-3 inches.
Important Disclaimer
These estimates are for planning purposes only. Actual costs vary by location, material availability, and project complexity. Always get at least 3 local quotes. This calculator does not replace professional advice.
Sources
See 13 garden bed & mulch ideas
Browse the looks, then price yours here.