Crushed Concrete Calculator

Finally, a Crushed Concrete Calculator Built for Real Projects

Figuring out how much crushed concrete you need sounds simple – until a generic gravel calculator uses a bulk density based on virgin stone instead of recycled concrete aggregate (RCA). Your cubic-yard volume may still be correct, but the estimated tons can change, which can mean paying for extra material you don’t need or running short and arranging another delivery.

If you’ve ever searched “how much crushed concrete do I need” and plugged your numbers into a generic gravel calculator, you’ve likely experienced this frustration firsthand. Crushed concrete is produced by pulverizing demolished concrete structures, and its physical properties – density, absorption, compaction behavior – differ meaningfully from quarried crushed limestone or granite. A calculator that ignores those differences can give you a less reliable tonnage estimate.

This crushed concrete calculator was designed specifically for recycled concrete aggregate (RCA) projects. Whether you’re planning driveway bases, a parking pad, a shed foundation, or a road base layer, it uses planning bulk densities for common crushed concrete products and lets you enter your supplier’s density when available. It estimates cubic yards, tons, and optional material cost so you can plan your order before contacting a supplier.

No engineering degree required. Enter your project dimensions, select your material settings, and get an actionable estimate in seconds.

Why Our Crushed Concrete Calculator Works

Here’s what separates this concrete estimator from generic tools that assume every aggregate behaves like quarried rock:

• RCA-specific planning densities – Crushed concrete bulk density can vary by product and supplier, so this calculator uses visible planning values rather than treating every recycled concrete aggregate the same. Current presets range from 1.20 to 1.40 US tons per cubic yard, including 1.40 tons/yd³ for General Crushed Concrete / RCA, 1.30 tons/yd³ for 21AA Crushed Concrete, and 1.20 tons/yd³ for #57 Recycled Concrete. If your supplier gives you a different bulk density, use the Supplier / Custom Density option instead.
• Optional order allowance – Add a little extra crushed concrete if your measurements are approximate, the area is uneven, or you expect minor spreading loss. The calculator shows this extra quantity separately from the measured requirement. It does not automatically apply a structural compaction factor; use supplier, contractor, or project-specific guidance when compaction affects the amount you need to order.
• Automatic unit conversions – It converts between cubic feet, cubic yards, and tons seamlessly. To find cubic yards, divide cubic feet by 27. For planning, 1 cubic yard of General Crushed Concrete / RCA is estimated at about 1.40 US tons in this calculator. Actual bulk weight can vary by product and supplier, so use a supplier-specific density when available. The calculator does this math for you, eliminating conversion errors.
• Local cost estimation – Current U.S. supplier examples show crushed concrete prices ranging from about $40 to $80 per cubic yard, while some recyclers list pickup prices around $9 to $22 per US ton. Prices vary by region and supplier, so input your local cost per US ton or cubic yard and any delivery fee for a more accurate budget estimate.
• Designed for recycled product properties – Unlike calculators built for pea gravel or crusher run, this tool uses planning bulk densities specific to recycled concrete aggregate (RCA). RCA generally has a lower unit weight and higher water absorption than comparable virgin aggregate, while actual density can vary by product, gradation, moisture, and supplier. If your supplier provides a bulk density, use that value for a more project-specific estimate.

How to Use the Calculator

Getting an accurate estimate takes three steps.

Step 1: Enter Your Project Dimensions

Start with the basics. Accurate estimates require careful measurement of the project’s length, width, and depth.

• Input length and width in feet for rectangular areas like driveways, parking pads, or shed foundations.
• Enter your target depth in inches. Convert inches to feet by dividing the depth by 12 before calculations – the calculator handles this conversion automatically. Typical planning depths are about 4–6 inches for residential driveways and 6–8 inches or more for heavier vehicles; actual depth depends on subgrade, drainage, loads, and project requirements.
• Select your project shape if you’re working with circular pads or irregular areas. Irregular terrain and site conditions can increase the amount of crushed concrete needed.

Step 2: Choose Material Settings

Not all crushed concrete is identical. Crushed concrete density can vary based on gradation and moisture content, so matching the calculator to your supplier’s material type improves accuracy.

• Select a density profile : based on your crushed concrete product. The calculator uses planning values such as 1.40 US tons/yd³ for General Crushed Concrete / RCA, 1.30 tons/yd³ for 21AA Crushed Concrete, and 1.20 tons/yd³ for #57 Recycled Concrete. If your supplier gives you a different bulk density, choose Supplier / Custom Density and enter that value instead.
• Add an optional order allowance : if your measurements are approximate, the area is uneven, or you expect minor spreading loss. This allowance is separate from structural compaction. For driveway bases or other compacted applications, use supplier, contractor, or project-specific guidance if compaction affects how much material you need to order.
• Add your material cost per ton or cubic yard : if you know your supplier’s pricing. If not, leave the cost field blank and calculate the crushed concrete quantity first.

Step 3: Get Your Material Estimate

Your results appear instantly:

• Total cubic yards needed and estimated tonnage, with any optional order allowance shown separately from the measured crushed concrete requirement.
• Supplier-adjusted order quantity when you enter a minimum order or order increment, such as a supplier that sells crushed concrete in 0.5-ton increments.
• Coverage area calculations and optional cost breakdown for project planning.
• Copy, export to Excel, print, or share your estimate with suppliers and contractors before placing an order.

What Makes This Different from Generic Gravel Calculators

A generic gravel calculator may use a bulk density based on virgin stone rather than the recycled concrete aggregate (RCA) supplied for your project. Because bulk density varies by material, the cubic-yard volume can be correct while the estimated tons are still too high or too low.

• Helps prevent overestimation – Using a bulk density that is higher than your supplier’s actual crushed concrete density will overestimate tonnage, while using one that is too low can leave you short. For example, 5 cubic yards weighs about 6.0 US tons at 1.20 tons/yd³ but 7.0 US tons at 1.40 tons/yd³. This calculator uses density values specific to crushed concrete and lets you use your supplier’s density when available.
• Accounts for RCA’s unique physical properties – FHWA reports typical specific gravity of about 2.2–2.5 for coarse recycled concrete aggregate and 2.0–2.3 for fine material, with water absorption typically around 2–6% and 4–8%, respectively. RCA generally has lower specific gravity and higher water absorption than comparable virgin aggregate, which is one reason material properties should not be assumed to be identical.
• Keeps compaction and order allowance separate – Compacted crushed concrete can behave differently from loose delivered material, but there is no single compaction percentage that fits every project. The calculator lets you add an optional order allowance while leaving structural compaction requirements to your supplier, contractor, or project specification.
• Reflects real cost savings – Crushed concrete can cost less than quarried stone, but the savings vary by region, supplier, product, and delivery cost. See our crushed stone cost per ton guide for current pricing ranges, then enter your local crushed concrete price in the calculator for a project-specific cost estimate.
• Handles diverse applications – From shed pads and driveway bases to parking areas and road-base projects, the calculator lets you enter the dimensions, layer depth, and crushed concrete density that match what you’re actually building.

Example Results for Real Projects

Numbers demonstrate why RCA-specific calculations matter.

Example: 20 × 12 ft driveway at 6 inches deep

To calculate cubic yards, multiply area by depth and divide by 27:

1. Volume = 20 × 12 × 0.5 ft = 120 cubic feet
2. Divide by 27 = 4.44 cubic yards
3. At 1.40 US tons per cubic yard (General Crushed Concrete / RCA planning density) = approximately 6.22 US tons
4. The measured requirement is about 4.44 cubic yards and 6.22 US tons before any optional order allowance.

If your supplier instead reports a bulk density of 1.30 US tons per cubic yard, the same 4.44 cubic yards would weigh about 5.78 US tons. At 1.40 tons/yd³, the estimate is about 6.22 tons. The project volume stays the same; the estimated tonnage changes with bulk density.

Example: 20 × 20 parking pad at 4 inches thick

A 20×20 driveway base at 4 inches thick requires about 5 cubic yards. At the General Crushed Concrete / RCA planning density of 1.40 US tons/yd³, the estimated weight is about 6.91 US tons. One US ton of crushed concrete covers about 57.9 square feet at 4 inches deep. Other planning densities or a supplier-specific value will change the estimated tonnage and coverage. You can add an optional order allowance for uneven measurements, minor spreading loss, or other small quantity variations.

Accurate estimates prevent two costly scenarios: paying for material you can’t use, or halting a project mid-installation because you ran short and need an expensive second delivery.

Perfect for These Projects

This crushed concrete calculator is ideal for:

• Homeowners installing gravel driveways, parking areas, or RV pads using recycled crushed concrete as a base layer – where getting the right depth and tonnage can help avoid over-ordering or costly second deliveries.
• DIYers building shed foundations, patio bases, or walkway underlayment who need to calculate how many tons in a yard of crushed concrete and estimate total material cost before heading to the supplier.
• Small contractors bidding road base, fill, or landscaping projects using recycled concrete and needing reliable volume-to-tonnage conversions to price jobs accurately.
• Landscapers planning drainage projects, french drains, or leveling applications with suitable RCA material who need to estimate square footage coverage at various depths.

Crushed concrete can vary in size and serves different purposes in construction projects – from fine fill material to coarse base aggregate. This tool handles those differences with crushed concrete planning density presets and a Supplier / Custom Density option.

Understanding Crushed Concrete Density and Coverage

Why Density Matters for Accurate Estimates

Bulk density is one of the most important variables in a crushed concrete calculation. Get it wrong, and the estimated tons and material cost can be off even when the cubic-yard volume is correct.

Crushed concrete bulk density varies by product and supplier. In this calculator, planning values range from about 88.9 to 103.7 lb/ft³ (1.20–1.40 US tons/yd³), rather than assuming the same density as virgin stone like crushed limestone or granite. Residual cement paste makes recycled concrete aggregate more porous, and processed RCA generally has a lower unit weight than comparable conventional aggregate.

For the calculator’s planning presets, 1 cubic yard of crushed concrete is estimated at about 1.20–1.40 US tons. How many yards is 1 ton of crushed concrete? About 0.71–0.83 cubic yard across those planning values. How many tons in a cubic yard of concrete aggregate? About 1.20–1.40 US tons in this calculator, unless you enter a supplier-specific bulk density.

Using the wrong density can overestimate or underestimate tonnage. Here’s the calculator’s planning reference chart:

Crushed Concrete Product	Planning Density	Approx. Bulk Weight
General Crushed Concrete / RCA	1.40 US tons/yd³	103.7 lb/ft³
21AA Crushed Concrete	1.30 US tons/yd³	96.3 lb/ft³
#57 Recycled Concrete	1.20 US tons/yd³	88.9 lb/ft³
Crushed Concrete Paver Base	1.30 US tons/yd³	96.3 lb/ft³
Crushed Concrete Road Base	1.35 US tons/yd³	100.0 lb/ft³

These are planning values used by the calculator, not universal densities for every supplier. Actual crushed concrete bulk density can vary with product, gradation, moisture, source material, and supplier. Use Supplier / Custom Density when a local bulk density is available.

Crushed stone, by contrast, is formed by mechanically crushing stone from quarries. Common types of crushed stone include limestone, dolomite, and granite, and these conventional aggregates often have a higher unit weight than processed recycled concrete aggregate, although actual bulk density varies by material, gradation, moisture, and supplier. Crushed stone has sharper edges than naturally eroded gravel, and it’s commonly used in concrete aggregates for structural applications. Pea gravel is a smaller type of gravel used in landscaping where load-bearing capacity isn’t the primary concern.

Moisture content also matters. Wet RCA can have a higher bulk weight per unit volume and may compact differently. Always verify your supplier’s specifications – material names and grades vary regionally.

Coverage Guidelines by Depth

Understanding how deep to spread your crushed concrete cover determines how much you need to order. Here are planning-level coverage guidelines; actual coverage varies with crushed concrete bulk density and the depth you spread it:

Application	Recommended Compacted Depth	Coverage per Ton (approx.)
Walkways, paths (no vehicles)	3–4 inches	~55–60 sq ft per ton at 4 in
Patio base, shed pad	4 inches	~55–60 sq ft per ton at 4 in
Driveway (passenger cars)	4–6 inches	~38–42 sq ft per ton at 6 in
Heavy vehicles, RV pads	6–8 inches	~28–32 sq ft per ton at 8 in
Road base, private roads	8–12 inches	Varies with sub grade quality

One ton of crushed concrete covers about 55 to 60 square feet at 4 inches deep. At 6 inches deep, coverage drops to roughly 38–42 sq ft per ton.

Proper depth helps support load-bearing capacity and reduce rutting. For poor sub grade conditions – clay soils, fill, or freeze-thaw zones – consider additional base thickness and geotextile fabric beneath the base layer based on project conditions. Place material in lifts, compacting each layer with a plate compactor before adding the next. This helps create uniform density, while drainage also depends on gradation, fines, and site conditions.

Common Calculation Mistakes to Avoid

Even experienced contractors make these errors when estimating recycled concrete aggregate:

• Using virgin gravel density instead of RCA-specific weights. For example, if a calculator assumes 110 lb/ft³ but your supplier lists 95 lb/ft³ for the crushed concrete, the tonnage estimate would be about 16% higher for the same volume. Always confirm the material type and adjust density accordingly.
• Forgetting compaction factors. Compacted crushed concrete can occupy less volume than loose material, but the amount varies by material and project conditions. An optional waste factor can cover measurement uncertainty, uneven areas, or minor spreading loss, but it is not a substitute for a project-specific loose-to-compacted conversion. If compaction affects how much material you need to order, use supplier, contractor, or project-specific guidance.
• Confusing US tons with metric tonnes. A US ton is 2,000 lb; a metric tonne is 2,205 lb. When ordering from suppliers – especially those using international equipment or documentation – confirm which unit they’re quoting. A 10% difference in unit definition means a 10% error in your order.
• Not accounting for soft subgrade conditions. Clay, organic fill, or poorly drained ground can reduce support and allow aggregate to move or mix into the subgrade. These conditions may require additional base thickness, stabilization, drainage improvements, or geotextile rather than simply using a higher waste factor.
• Mixing cubic yard and ton pricing without proper conversion. Suppliers may quote crushed concrete by the cubic yard or by the US ton. Without converting using the correct density – not generic gravel density – you can’t compare quotes accurately. At the calculator’s General Crushed Concrete / RCA planning density of 1.40 US tons per cubic yard, a $20 per ton material price is about $28 per cubic yard before delivery or other fees.

Frequently Asked Questions

How many tons of crushed concrete do I need for a driveway?

It depends on your driveway’s length, width, and target depth. To calculate cubic yards, divide project volume by 27, then multiply by the appropriate density conversion.

For example, a 20 × 40 ft driveway at 6 inches deep:

• Volume = 20 × 40 × 0.5 = 400 cubic feet
• 400 ÷ 27 = 14.8 cubic yards
• At 1.40 US tons per cubic yard = approximately 20.7 US tons
• With an optional 10% order allowance = approximately 22.8 US tons, if you choose to add it for measurement uncertainty or minor material loss

The calculator applies your selected density automatically and shows any optional order allowance separately. It does not automatically apply a structural compaction factor. Actual needs vary based on subgrade conditions, material gradation, and your supplier’s specific RCA specifications.

What’s the difference between crushed concrete and regular gravel?

Crushed concrete is a recycled product made from demolished concrete structures that have been pulverized into angular fragments. Regular crushed stone comes from quarried rock – limestone, granite, or dolomite – that’s mechanically crushed at a quarry.

Key differences:

• Density: RCA generally has a lower compacted unit weight than comparable conventional aggregate. This calculator uses planning densities of 1.20–1.40 US tons/yd³, while actual bulk density varies by product and supplier.
• Cost: Crushed concrete can cost less than quarried stone, especially when recycled material is available locally, but actual savings vary by supplier, material, hauling distance, and delivery cost.
• Water absorption: RCA generally absorbs more moisture than comparable virgin aggregate. FHWA reports typical absorption of about 2–6% for coarse processed RCA and 4–8% for fine RCA, which can affect moisture behavior and material handling.
• Performance: Properly processed RCA is widely used in base and subbase applications, but gradation, fines, contamination, and project specifications matter. Crushed stone is commonly used in concrete aggregates for structural applications where consistency matters.

For most driveway, shed pad, and road base applications, recycled crushed concrete can be a cost-effective and environmentally responsible choice.

How accurate are these calculator estimates?

This tool provides planning-level estimates suitable for material ordering and budgeting – not engineering specifications. Actual density, moisture content, gradation, pricing, and delivery costs vary by supplier and region.

Calculator accuracy depends on the measurements and bulk density you enter, so there is no universal accuracy percentage for every project. Actual density, moisture content, and gradation can vary by supplier. For larger or more complex projects, we recommend confirming specifications with your local supplier before placing large orders.

Can I use this for other recycled materials?

This calculator is optimized specifically for crushed concrete aggregate (RCA) and uses planning density presets for common crushed concrete products. Asphalt millings, crushed brick, sand, and other recycled construction materials have different densities and compaction characteristics.

For virgin crushed stone projects, check our crushed stone calculator. Density differences between material types can be significant – FHWA reports milled or processed reclaimed asphalt pavement (RAP) at a unit weight of about 120–140 lb/ft³, depending on aggregate type and moisture content. For asphalt millings and other recycled materials, use material-specific data or a supplier-provided bulk density rather than an RCA planning density. Using the wrong density for your material type can lead to the same ordering errors this tool was built to prevent.