Estimate mulch, gravel, soil, and concrete volume in cubic yards with accurate 3D shape tools for landscaping, slab pours, and material ordering.
Rectangular cuboid with length, width, and height
Volume = Length × Width × Height
Use these quick steps to get a fast cubic yard estimate before you review the full guide below.
Measure length, width, and depth, or switch to a round or custom shape that matches your project.
Add the measurements in feet, inches, yards, or meters and let the calculator handle the volume conversion.
Review cubic yards, cubic feet, and cubic meters, then add a waste allowance before ordering material.
Follow these steps to estimate bulk material for a bed, driveway, slab, trench, or container without doing every conversion by hand.
Start with the shape that best fits the space you need to fill. Rectangular cuboid works for most mulch beds, topsoil spreads, and concrete slabs. Cylinder is useful for round planters, post holes, and columns. Cone, pyramid, hemisphere, and hollow shapes help when you need a more advanced volume estimator for custom forms or containers.
If the area is irregular, split it into simple sections. Measure each part, calculate its volume, and add the totals. That method is faster and more dependable than guessing one oversized average.
Measure length, width, depth, radius, or height carefully, then enter the values using the same unit style whenever possible. For landscaping, use average depth after you smooth the area. For a concrete slab, use the planned finished thickness, not the deepest dip in the form.
Double-check every dimension before you calculate. A small error in depth can change your order by a large amount when the surface area is wide.
The calculator returns cubic yards, cubic feet, and cubic meters. Cubic yards are what most US suppliers use for bulk material orders. Cubic feet help when you compare bagged products, and cubic meters help when a supplier or project plan uses metric units.
Use the cubic yard result as your base estimate, then adjust it for waste allowance, compaction factor, and delivery minimums.
The same space always has the same volume, but materials behave differently after delivery. Mulch settles, gravel shifts, topsoil compacts, and concrete jobs need a margin because short pours are difficult to fix once the truck leaves.
For many home jobs, adding 5 to 15 percent extra is a practical way to protect your order. The right number depends on material type, site conditions, and how precise the finish must be.
Know what each number means before you compare quotes or schedule a delivery.
This is the main number for bulk material orders in the United States. Suppliers commonly price mulch, topsoil, gravel, sand, and ready-mix concrete by the cubic yard because it is an easy way to describe a large amount of volume.
Cubic feet are useful when you compare bulk delivery with bagged products. Since 1 cubic yard equals 27 cubic feet, you can quickly estimate how many bags are needed if the packaging lists only cubic feet.
Cubic meters help when a supplier quotes in metric units or when you are working from a plan that uses metric dimensions. One cubic yard is about 0.764555 cubic meters.
The tool gives you clean geometric volume, but it cannot see uneven grade, soft spots, settlement, or the way loose bulk material packs down after spreading. That is why professional estimates often add a buffer even when the measurements are solid.
Use a small cushion for flat, square, predictable jobs. Use a larger cushion when your ground is uneven, your dimensions are approximate, or the material will compact. If a supplier quotes by weight, ask for density so you can turn volume into pounds or tons before the truck arrives.
Treat the output as the base number, then refine it using your waste allowance, compaction factor, and delivery constraints.
Use these formulas when you want to calculate cubic yards manually and verify an order before you buy.
For a rectangular space, multiply length by width by depth to get cubic feet. Then divide by 27 to convert cubic feet into cubic yards. If depth is listed in inches, divide by 12 first so all of your dimensions are in feet.
Imagine you are pouring a concrete patio that is 12 feet long, 16 feet wide, and 4 inches thick. First convert thickness to feet: 4 ÷ 12 = 0.333 feet. Then calculate cubic feet: 12 × 16 × 0.333 = 63.94 cubic feet.
Next, convert cubic feet to cubic yards: 63.94 ÷ 27 = 2.37 cubic yards. Because concrete pours should not run short, adding a 7 percent cushion gives an order of about 2.54 cubic yards.
The same process works for mulch. A landscape bed that is 24 feet by 8 feet at 3 inches deep uses 24 × 8 × 0.25 = 48 cubic feet. Divide by 27 and you get 1.78 cubic yards. Rounding up to 2 cubic yards is often a smart choice because mulch settles after watering and spreading.
For irregular areas, calculate each simple section separately and then add them together. That keeps the math manageable and makes the final cubic yard estimate easier to trust.
Real projects show how a cubic yard calculator fits into daily landscaping and construction work.
A bed that is 30 feet long and 6 feet wide covers 180 square feet. At 3 inches deep, you need 45 cubic feet, or about 1.67 cubic yards. Most homeowners order 2 cubic yards so the mulch depth still looks full after it settles.
A driveway that is 40 feet long, 12 feet wide, and 4 inches deep needs about 5.92 cubic yards. Because gravel compacts and shifts as you level it, rounding up to about 6.5 cubic yards is often a safer order.
Spreading 2 inches of topsoil over 1,000 square feet takes about 6.19 cubic yards. If the yard has low spots or you expect settling, a 10 percent cushion brings the order closer to 6.8 cubic yards.
A sidewalk that is 30 feet long, 4 feet wide, and 5 inches thick uses about 1.85 cubic yards. Since ready-mix jobs need a margin, many crews would order about 2 cubic yards rather than risk stopping short during finishing.
A cylindrical post hole with a 1-foot radius and a 3-foot depth holds about 9.42 cubic feet, or 0.35 cubic yards. Multiply that by the number of holes if you are planning fence posts, footing tubes, or repeated round planters.
Turn the volume result into a smarter mulch, soil, gravel, or concrete order.
One cubic yard covers about 324 square feet at 1 inch deep, 162 square feet at 2 inches, 108 square feet at 3 inches, and 81 square feet at 4 inches. Those benchmarks help when you know the area but want to choose a realistic mulch depth or topsoil depth before you order.
For mulch, 2 to 3 inches is common. For gravel driveway surface layers, 3 to 4 inches is often used. For lawn topdressing or light soil improvement, the correct depth depends on the condition of the existing grade and how much correction you need.
Because 1 cubic yard equals 27 cubic feet, you can convert bagged products quickly. A 0.75-cubic-foot bag takes 36 bags to equal a yard. A 1.5-cubic-foot bag takes 18 bags. For concrete, 1 cubic yard is about 45 bags of 60-pound mix or about 34 bags of 80-pound mix.
Bagged products are convenient for small repairs, but bulk delivery saves time, labor, and packaging waste once your project reaches several cubic yards.
A cubic yard measures volume, not weight. Gravel often weighs about 1.2 to 1.45 tons per cubic yard. Topsoil can range from roughly 2,000 to 2,700 pounds per cubic yard depending on moisture. Mulch is lighter and varies more by material type.
Ask the supplier for actual product density before loading a pickup or trailer. Wet material can exceed a vehicle's safe load limit long before the bed looks full.
Concrete commonly uses a 5 to 10 percent waste allowance. Mulch, topsoil, gravel, and sand often use 10 to 15 percent extra, especially on uneven sites. Fill materials can compact after placement, so a loose order may need to be larger than the final finished volume.
When the material will be compacted or the grade is inconsistent, confirm the supplier's recommended compaction factor before you commit to the order.
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These answers cover the manual conversions, coverage questions, and ordering details people ask most often.
Multiply length by width by depth to get cubic feet, then divide by 27 to convert to cubic yards. If your depth is in inches, divide by 12 first so every measurement is in feet before you calculate.
One cubic yard equals 27 cubic feet because one yard is 3 feet and 3 × 3 × 3 = 27. That conversion is the key step behind most mulch, gravel, soil, and concrete estimates.
At 2 inches deep, 1 cubic yard covers about 162 square feet. At 3 inches deep, it covers about 108 square feet. At 4 inches deep, it covers about 81 square feet.
A cubic yard is a measure of volume, not weight. Most gravel weighs about 2,400 to 2,900 pounds per cubic yard, or roughly 1.2 to 1.45 tons, depending on stone size and moisture.
You need about 45 bags of 60-pound concrete mix or about 34 bags of 80-pound mix to make 1 cubic yard. For larger pours, ready-mix delivery is often easier and more consistent.
Most landscape beds use 2 to 3 inches of mulch. Two inches works well for freshening existing mulch, while 3 inches is common for new beds. Going much deeper can limit airflow around plant roots.
Yes. For a slab, enter the length, width, and thickness. Convert the thickness to feet if you are calculating by hand, or let the calculator handle the volume and conversion to cubic yards for you.
A 5 to 10 percent waste allowance is common for concrete. For mulch, topsoil, and gravel, many homeowners order 10 to 15 percent extra, and sometimes more when compaction or uneven grade is expected.
Multiply cubic yards by 0.764555 to get cubic meters. For example, 2 cubic yards is about 1.53 cubic meters.