How much mulch do I need?
Calculate this loadMeasure each bed, use 2–3 inches of depth, and convert to cubic yards or bags. That is the whole decision.
Project calculator
Area 1
Cubic yards
0.93 yd³
Tons
0.37 t
2 cu ft bags
13
Estimated cost
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Mulch planning density 0.4 t/yd³ (Penn State & UGA Extension hardwood/bark mulch 500–1,000 lb/yd³). Order 1 yd³ with 5% waste. 3 cu ft bags: 9.
‘How much mulch’ is a coverage question dressed up as a product question. Coverage is area times depth. A cubic yard is 27 cubic feet, so at 3 inches (0.25 ft) it covers 27 ÷ 0.25 = 108 square feet. At 2 inches it covers 162 square feet. Remember those two numbers and you can estimate a front yard from the sidewalk.
People over-mulch trees and under-mulch new beds. Keep mulch a few inches back from trunks. On new beds, 3 inches suppresses weeds without smothering perennials that emerge through it. On slopes, use a shredded hardwood that knits; nuggets roll downhill.
This page uses the same engine as the mulch calculator with copy aimed at the question people actually type. Add every bed as its own area, including the annoying strip between the sidewalk and the street. That strip is usually the one you forget and then buy in bags at a panic price on Saturday.
If you are comparing a $4 bag to a $36 yard, do the arithmetic: 13.5 bags of 2 cu ft equal a yard. The yard wins on anything bigger than a single mailbox bed, and you are not stuffing 13 bags into a sedan.
Formula
Yards = (ft² × inches ÷ 12) ÷ 27. A yard covers 108 ft² at 3 inches.
Worked example
Three 4 × 10 ft beds at 3 inches: 120 ft² × 0.25 ÷ 27 = 1.11 yd³, or 15 of the 2 cu ft bags.
Mulch on the ground
Typical cover is 3 inches. Range 0.25–0.55 t/yd³. Dyed hardwood sits near 800 lb. Fresh bark and rubber mulch differ — confirm.
Density table
| Material | t / yd³ | lb / yd³ | Source |
|---|---|---|---|
| Mulch | 0.4 | 800 | Penn State & UGA Extension hardwood/bark mulch 500–1,000 lb/yd³ |
Related calculators
Mulch calculator
Most beds want 2–3 inches of hardwood or bark mulch. Measure in feet, keep depth in inches, and we will give yards and bags.
Yards of mulch calculator
One cubic yard of mulch covers 162 ft² at 2 inches or 108 ft² at 3 inches. Add your beds to see the total.
Bags of mulch calculator
A cubic yard is 13.5 bags of 2 cu ft mulch or 9 bags of 3 cu ft. We show both so you can price the switch to bulk.