How Much Does a Yard of Concrete Weigh?
The definitive breakdown — pounds, tons, kilograms, and every variable that shifts the number. Know your figures before you pour, plan, or demolish.
Whether you’re planning a driveway pour, designing a backyard patio, or managing a demolition project, the weight of concrete is a number you can’t afford to guess. Underestimate it and you’ll overload a dumpster, violate a weight limit, or stress a structure that was never designed to carry that load.
This guide breaks down exactly how much a cubic yard of concrete weighs — in pounds, tons, and kilograms — and explains every factor that changes that number. You’ll also find a step-by-step calculation formula, a full mix-type comparison, real-project weight estimates, and field-tested expert tips.
What Is a Cubic Yard of Concrete?
A cubic yard measures exactly 3 feet on each side — 3 ft × 3 ft × 3 ft = 27 cubic feet of volume. It’s the standard unit every US ready-mix supplier uses when pricing and delivering concrete.
To put the volume in context: one cubic yard poured at 4 inches thick covers approximately 81 square feet — slightly smaller than a 9×9 room. At 6 inches thick it covers around 54 square feet.
Pro Tip: Ready-mix trucks carry 9–11 cubic yards per load. A full 10-yard truck hauls ~40,000 lbs of concrete — which is why delivery drivers always need a clear, reinforced access route to the pour site.
Standard Concrete Weight: The Core Numbers
Standard concrete — used in driveways, sidewalks, patios, and residential slabs — is made from Portland cement, sand, gravel, and water. Its density typically falls between 145 and 150 pounds per cubic foot. Here’s the math:
Example: 27 cu ft × 150 lb/cu ft = 4,050 lbs
In tons: 4,050 ÷ 2,000 = 2.025 short tons
In kg: 4,050 × 0.4536 = ≈ 1,837 kg
| Concrete State | Weight per Cu Yd | Use This For |
|---|---|---|
| Wet / Freshly Mixed | 4,000 – 4,050 lbs | Pour planning, truck loads |
| Fully Cured / Dry Slab | 3,400 – 3,600 lbs | Structural dead-load engineering |
| Broken / Demolition Rubble | ~2,025 lbs | Dumpster sizing, haul estimates |
Demolition note: Broken concrete weighs roughly half of solid slab per cubic yard because air gaps between chunks take up significant volume. Factor this in when estimating dumpster capacity — overweight containers result in hefty fees.
Concrete Weight by Mix Type
Different aggregate choices and structural requirements change the density — and therefore the weight — per cubic yard. Here’s a full comparison from lightweight to high-density mixes:
| Concrete Type | Weight (lbs/cu yd) | Typical Application |
|---|---|---|
| Lightweight | 2,360 – 3,120 | Upper floors, bridge decks, retrofits |
| Standard Normal Weight Most common | 3,700 – 4,220 | Driveways, patios, foundations, slabs |
| Reinforced (with rebar) | ~4,214 | Retaining walls, structural elements |
| High-Strength | 4,200 – 4,500 | Commercial columns, high-rise builds |
| High-Density | 4,720 – 6,740 | Radiation shielding, nuclear facilities |
| Asphalt Concrete | ~3,781 | Road surfaces, parking lots |
Key Factors That Affect Concrete Weight
Several variables can push your concrete above or below the standard estimate. Understanding them helps you plan accurately — especially on larger pours where even a 5% weight difference has real consequences.
Aggregate Type
The single biggest variable. Heavy aggregates (granite, barite, iron) push density up significantly. Lightweight aggregates (pumice, perlite, expanded clay) reduce it by 25–40%.
Water-Cement Ratio
Higher water content makes fresh concrete heavier. After curing, excess water evaporates and reduces final dry weight. Most mixes target a w/c ratio between 0.40 and 0.60.
Rebar & Reinforcement
Steel rebar at typical residential densities adds 200–400 lbs per cubic yard. Heavily reinforced foundations and commercial structural elements push this significantly higher.
Moisture Content
Concrete absorbs moisture from rain, groundwater, and saturated soil. A slab in a wet environment can weigh noticeably more than an equivalent dry-site pour.
Admixtures
Fly ash, silica fume, air-entraining agents, and chemical accelerators each modify mix density. Air-entrained concrete (3–6% air by volume) is measurably lighter than standard mixes.
Air & Void Content
Intentional air entrainment reduces weight slightly but dramatically improves freeze-thaw performance — critical for flatwork in cold US climates like the Midwest and Northeast.
Concrete Weight for Common US Projects
Most homeowners and contractors think in terms of actual jobs, not abstract cubic yards. Here’s how the weight adds up across the most common residential pours:
| Project | Approx. Cu Yards | Total Weight |
|---|---|---|
| 10×10 ft patio (4″ thick) | ~1.2 yards | ~4,860 lbs |
| Standard 2-car driveway (4″ thick) | 7 – 10 yards | 28,000 – 40,000 lbs |
| 20×20 ft garage slab (4″ thick) | ~5 yards | ~20,250 lbs |
| 100 ft sidewalk (4″ thick, 4 ft wide) | ~5 yards | ~20,250 lbs |
| Residential foundation footing | 15 – 30+ yards | 60,000 – 120,000+ lbs |
| Full ready-mix truck load (10 yards) | 10 yards | ~40,000 lbs (20 tons) |
Disposal Rule of Thumb: A standard 10-yard dumpster handles roughly 5 cubic yards of solid concrete (~20,000 lbs) before hitting its weight limit. With broken demolition rubble you can fit slightly more by volume. Always confirm limits with your hauler before loading.
How to Calculate Concrete Weight — 3 Steps
Calculate Volume in Cubic Feet
Multiply Length (ft) × Width (ft) × Thickness (ft). Convert inches to feet by dividing by 12. Example: 20×10 slab at 4″ thick → 20 × 10 × 0.333 = 66.6 cu ft.
Convert Cubic Feet to Cubic Yards
Divide by 27 (since 1 cubic yard = 27 cubic feet). Example: 66.6 ÷ 27 = 2.47 cubic yards.
Multiply by Weight per Cubic Yard
Use 4,050 lbs for standard concrete. Add 10–15% buffer when ordering. Example: 2.47 × 4,050 = ~10,003 lbs ≈ 5 tons.
Step 1: 20 × 10 × (4÷12) = 66.67 cu ft
Step 2: 66.67 ÷ 27 = 2.47 cu yd
Step 3: 2.47 × 4,050 = 10,003 lbs (≈ 5 tons)
🧮 Our Calculators
5 Expert Tips: Working With Concrete Weight on Site
Verify Access Routes Before the Truck Arrives
A fully loaded ready-mix mixer can reach 66,000 lbs combined with the truck. Most residential driveways and older asphalt paths were never engineered for that load. Confirm the route with your supplier in advance and consider a pump truck or extended chute if access is restricted.
Know Your Dumpster Weight Limit Before Loading
Most 10-yard roll-off dumpsters have a 10-ton (20,000 lb) weight limit. At ~4,050 lbs per solid yard, you max out at about 5 yards of slab. Overweight containers may be refused pickup or hit with significant penalty fees — confirm limits before demolition begins.
Use the Broken Concrete Weight Factor
Broken slab weighs roughly 2,025 lbs per cubic yard — half of solid. This means you can load more broken concrete by volume than you might assume. Plan haul trips using this figure for demolition projects, not the solid-slab weight.
Always Order 10–15% More Than Calculated
Running short mid-pour is always more expensive than a small excess. Uneven subgrades, spillage, and form imperfections all eat into your calculated volume. Build in a buffer — suppliers can return unused concrete and most won’t penalize modest overorders.
Structural Dead Loads Require a Licensed Engineer
For elevated slabs, concrete decks, or load-bearing structures, cured dead load is calculated at 150 lbs per cubic foot by structural engineers. Always involve a licensed professional where load-bearing capacity is a design factor. For project supplies, tools, and home improvement materials, check 🏠 IKEA Home Improvement.
Frequently Asked Questions
A standard cubic yard of concrete weighs approximately 2 tons (4,000–4,050 lbs). Lightweight mixes are closer to 1.4–1.6 tons per yard, while high-density specialty concrete can exceed 3 tons per cubic yard.
One cubic yard of standard concrete weighs approximately 1,814 to 1,837 kilograms (~1.84 metric tons). Conversion: 4,050 lbs × 0.4536 = 1,837 kg.
Broken demolition concrete weighs roughly 2,025 lbs per cubic yard — about half the weight of a solid slab — because air gaps between chunks take up significant space. Use this number when sizing dumpsters for slab removal jobs.
Lightweight concrete typically weighs 2,360 to 3,120 pounds per cubic yard, depending on the low-density aggregate used. It’s specified when reducing structural dead load is a design priority — common in upper-floor additions and bridge deck retrofits.
A standard ready-mix truck carries 9 to 11 cubic yards per load. A full 10-yard load weighs approximately 40,000 lbs (20 tons). Short loads of 3–5 yards are available for smaller pours when a full truck isn’t practical.
No. Cement is an ingredient in concrete, not the same product. Dry Portland cement weighs about 1,506 lbs per cubic yard — significantly lighter than finished concrete at ~4,050 lbs per yard. Concrete is cement + sand + gravel + water combined.
A 10×10 ft slab at 4 inches thick contains about 1.23 cubic yards, weighing roughly 4,980 lbs (~2.5 tons). At 6 inches thick the same footprint weighs about 7,500 lbs (3.75 tons).
The Bottom Line
A standard cubic yard of concrete weighs approximately 4,000 to 4,050 pounds — or 2 tons. That figure applies to the normal-weight mixes used in the vast majority of residential and commercial projects across the United States.
Weight shifts based on your specific mix design, moisture content, rebar reinforcement, and whether you’re dealing with solid poured concrete or broken demolition rubble. For project planning, use 4,050 lbs per cubic yard as your baseline, add a 10–15% buffer when ordering ready-mix, and always confirm weight limits with your hauler or supplier. When structural loads are involved, work with a licensed engineer.
Ready to calculate exactly how much concrete your project needs? Use our free tools for instant volume and weight estimates: