Coverage Calculator: Any Landscaping Material in Yards

Q: What is a cubic yard and how is it calculated?

A cubic yard is a volume equal to 3 feet × 3 feet × 3 feet = 27 cubic feet. To calculate cubic yards for a landscaping project, multiply your area in square feet by the depth in feet (depth inches ÷ 12), then divide by 27. For example: 100 sq ft × (3 inches ÷ 12) = 100 × 0.25 = 25 cubic feet ÷ 27 = 0.93 cubic yards.

Q: How do I calculate coverage for an L-shaped area?

For an L-shaped area, divide it into two rectangles. Measure and calculate each rectangle separately (length × width), then add the two areas together for the total square footage. Enter the dimensions of both rectangles in the L-shaped option of this calculator and it will compute the total automatically.

Q: How much does 1 cubic yard cover at different depths?

One cubic yard covers: 324 sq ft at 1 inch deep; 162 sq ft at 2 inches deep; 108 sq ft at 3 inches deep; 81 sq ft at 4 inches deep; 54 sq ft at 6 inches deep. The formula is: coverage (sq ft) = 324 ÷ depth (inches). This works for any material since coverage depends only on volume, not material type.

Q: What is the best depth for mulch?

The ideal mulch depth is 2–3 inches. Less than 2 inches provides insufficient weed suppression and dries out quickly. More than 4 inches can suffocate plant roots by blocking oxygen exchange and trapping too much moisture. For new beds, start with 3 inches. For annual refreshing of existing beds, add 1–2 inches to top up the existing layer.

Q: How many bags equal 1 cubic yard?

The number of bags per cubic yard depends on bag size: 54 bags (0.5 cu ft each), 27 bags (1 cu ft each), 18 bags (1.5 cu ft each), 13.5 bags (2 cu ft each — most common for mulch), 9 bags (3 cu ft each). Use the bags-to-cubic-yards converter for precise calculations.

Yard Coverage Calculator

Select your area shape, enter dimensions, and pick your material

Area Shape

Length (ft)

Width (ft)

Depth (inches)

Material

Bag Size (for bag count estimate)

Estimates only. Add 10–15% extra for waste. See Terms of Use.

How We Calculate This +

Formula

Volume (cu ft) ÷ Depth (ft) = Coverage (sq ft) [inverse of standard volume calc]

Key Assumptions

Converts bags, cubic yards, or bulk tons to coverage area at the selected depth
Standard bag sizes used: 0.75, 1, 1.5, 2, 3 cu ft

How to Use the Coverage Calculator

1 Pick your area shape — Choose rectangle, circle, triangle, or L-shape. For irregularly shaped areas, break them into simpler shapes and add the results together.
2 Enter dimensions and depth — Measure in feet and inches. Use the depth quick-chips for common depths or type a custom value.
3 Select your material — Choose from 10 preset materials with real 2026 price data, or enter a custom density for specialty materials. Weight and cost update instantly.
4 Get your quantities — See cubic yards, cubic feet, tons, and bags side by side. Always order 10–15% extra to account for uneven ground and waste.

Frequently Asked Questions

What is a cubic yard and how is it calculated? +

A cubic yard is a volume equal to 3 ft × 3 ft × 3 ft = 27 cubic feet. To convert your project: multiply area (sq ft) by depth in feet (inches ÷ 12), then divide by 27. Example: 100 sq ft × (3″ ÷ 12) = 25 cu ft ÷ 27 = 0.93 cubic yards.

How do I calculate coverage for an L-shaped area? +

Divide the L into two rectangles. Measure the length and width of each section. This calculator does the math automatically when you select the L-Shape option — just enter the dimensions of both sections and it totals the area for you.

How much does 1 cubic yard cover at different depths? +

One cubic yard covers: 324 sq ft at 1″ deep; 162 sq ft at 2″; 108 sq ft at 3″; 81 sq ft at 4″; 54 sq ft at 6″. The formula is: coverage (sq ft) = 324 ÷ depth (inches). This applies to any material since volume is material-independent.

What is the best depth for mulch? +

The ideal mulch depth is 2–3 inches. Less than 2 inches dries out quickly and lets weeds through. More than 4 inches can suffocate roots by blocking oxygen. For new beds, use 3 inches. For annual top-ups, add 1–2 inches to restore the existing layer. Keep mulch 2–3 inches away from plant stems to prevent rot.

How many bags equal 1 cubic yard? +

It depends on bag size: 54 bags (0.5 cu ft) · 27 bags (1 cu ft) · 18 bags (1.5 cu ft) · 13.5 bags (2 cu ft, most common for mulch) · 9 bags (3 cu ft). For the most detailed bag-to-cubic-yard conversions, see the bags to cubic yards converter.

How to Calculate Material Coverage

Every landscaping project starts with one question: how much material do I need? The answer is always volume — cubic yards for bulk orders, cubic feet for bagged material. This universal calculator handles the math for any combination of shape, depth, and material.

Why Material Type Matters for Weight and Cost

Cubic yards measure volume, but suppliers often price by weight (tons). Different materials have dramatically different densities — lava rock weighs 1,300 lbs per cubic yard while decomposed granite weighs 3,000 lbs per cubic yard, more than twice as much. This calculator uses real 2026 density data for each material so your ton estimate is accurate, not a rough guess.

Bags vs. Bulk: A Quick Comparison

For projects under 1–2 cubic yards, bagged material is convenient and avoids delivery minimums. Over 2 cubic yards, bulk typically saves 40–60% on material cost. The tradeoff: bulk requires access for a truck or tractor and a way to move and spread the material. For heavy materials like gravel and rock, bulk becomes the obvious choice even sooner because the sheer weight makes bagged options impractical.

Ready to calculate? Use the coverage calculator above ↑ to get your exact quantities in seconds.