How Much Does a Yard of Concrete Weigh? (Cured vs Wet Density)
Exact weight calculations for one cubic yard of concrete: cured density (4,050 lbs), wet mix weight, lightweight aggregates, and vehicle hauling limits.
A standard cubic yard of cured concrete weighs approximately 4,050 pounds (2.025 US tons). Wet un-cured concrete weighs slightly more, averaging 4,100 to 4,150 pounds per cubic yard, because it retains the batch water before hydration and surface evaporation occur.
To calculate concrete volume and weight for your project dimensions, use the Concrete Slab Calculator or review the Concrete Cure Time Chart.
The Short Answer: Concrete Weight Summary
Concrete density varies depending on aggregate type, entrained air, and water-cement ratio. Below are the standard baseline weights across 1 cubic foot, 1 cubic yard, and 1 cubic meter:
| Concrete Type | Density (lbs/cu ft) | Weight per Cu Yd (lbs) | Weight per Cu Yd (US Tons) | Metric Density (kg/m³) |
|---|---|---|---|---|
| Standard Normal-Weight | 145 – 150 lbs/ft³ | 3,915 – 4,050 lbs | 1.96 – 2.03 tons | 2,320 – 2,400 kg/m³ |
| Reinforced Concrete (with Rebar) | 150 – 155 lbs/ft³ | 4,050 – 4,185 lbs | 2.03 – 2.09 tons | 2,400 – 2,480 kg/m³ |
| Structural Lightweight | 90 – 115 lbs/ft³ | 2,430 – 3,105 lbs | 1.22 – 1.55 tons | 1,440 – 1,840 kg/m³ |
| Heavyweight (Radiation Shielding) | 180 – 240 lbs/ft³ | 4,860 – 6,480 lbs | 2.43 – 3.24 tons | 2,880 – 3,840 kg/m³ |
| Pervious Concrete | 100 – 125 lbs/ft³ | 2,700 – 3,375 lbs | 1.35 – 1.69 tons | 1,600 – 2,000 kg/m³ |
Why Wet Concrete Weighs More Than Dry Concrete
When ready-mix trucks arrive on site, concrete contains 250 to 350 pounds (30 to 42 gallons) of water per cubic yard.
Wet Concrete Weight = Aggregates (3,000 lbs) + Cement (500 lbs) + Water (300 lbs) + Air Voids = ~4,100 lbs/yd³
During the chemical hydration process, approximately half of this water bonds chemically with the Portland cement minerals to form calcium silicate hydrate crystals. The remaining free water bleeds to the top surface and evaporates during the initial curing cycle. As a result:
- At placement (Wet Slump): ~4,100 to 4,150 lbs per cubic yard.
- At 28-day cure (Design Strength): ~3,950 to 4,050 lbs per cubic yard.
- Long-term dry equilibrium: ~3,900 lbs per cubic yard in arid conditions.
Bagged Concrete Weight Equivalent
If you mix concrete by hand from retail bags, the total weight required to equal one cubic yard remains roughly 4,000 pounds when mixed with water.
| Bag Size | Bags per Cu Yd | Dry Bag Weight | Water Added (~0.5 gal/bag) | Total Placed Weight |
|---|---|---|---|---|
| 80 lb (36.3 kg) | 45 bags | 3,600 lbs | ~375 lbs (45 gal) | 3,975 lbs |
| 60 lb (27.2 kg) | 60 bags | 3,600 lbs | ~375 lbs (45 gal) | 3,975 lbs |
| 50 lb (22.7 kg) | 72 bags | 3,600 lbs | ~375 lbs (45 gal) | 3,975 lbs |
| 40 lb (18.1 kg) | 90 bags | 3,600 lbs | ~375 lbs (45 gal) | 3,975 lbs |
Retail dry bags do not contain batch water. Adding approximately 3 to 4 quarts of clean water per 80-pound bag yields 0.60 cubic feet of wet concrete.
Hauling & Transportation Limits
Understanding concrete weight is essential for transporting bagged materials or ordering ready-mix delivery. A single cubic yard (4,050 lbs) exceeds the payload rating of most non-commercial pickup trucks:
| Vehicle Class | Typical Payload Rating | Max Dry Bags (80 lb) | Max Ready-Mix Yards |
|---|---|---|---|
| Half-Ton Pickup (F-150, Silverado 1500) | 1,600 – 2,100 lbs | 18 – 24 bags | 0.40 to 0.50 yards (Overload risk) |
| Three-Quarter-Ton (F-250, 2500) | 3,000 – 4,000 lbs | 35 – 45 bags | 0.75 to 0.90 yards |
| One-Ton Dually (F-350, 3500) | 4,500 – 6,500 lbs | 55 – 75 bags | 1.0 to 1.5 yards |
| Single-Axle Utility Trailer (3,500 lb GVWR) | 2,200 – 2,600 lbs | 25 – 30 bags | 0.55 yards |
| Standard Ready-Mix Truck (Front/Rear Discharge) | 36,000 – 45,000 lbs | N/A | 8.0 to 10.0 yards (Highway load limit) |
Attempting to haul a full cubic yard of concrete in a half-ton pickup can bend axles, damage suspension springs, and blow tires. If your project requires more than 1 cubic yard, schedule ready-mix delivery or split retail bag pickups across multiple trips.
How to Calculate Concrete Weight for Any Slab
Use this formula to calculate the total weight of concrete for a slab or footing:
Step 1: Volume (cu ft) = Length (ft) × Width (ft) × (Thickness (inches) / 12)
Step 2: Volume (cu yd) = Volume (cu ft) / 27
Step 3: Weight (lbs) = Volume (cu yd) × 4,050
Step 4: Weight (tons) = Weight (lbs) / 2,000
Example Calculation: 12′ × 12′ Patio at 4 Inches Thick
- Volume in cubic feet:
12 × 12 × (4 / 12) = 48 cubic feet - Volume in cubic yards:
48 / 27 = 1.78 cubic yards - With 10% waste buffer:
1.78 × 1.10 = 1.96 cubic yards - Total placed weight:
1.96 × 4,050 = 7,938 pounds (3.97 US tons)
Common Weight Estimation Mistakes
- Forgetting Formwork Lateral Pressure: Because wet concrete weighs 150 lbs/cu ft, it acts as a dense liquid against formwork. Wall forms must be braced with 2x4 walers and tie rods to resist outward blowout pressure.
- Underestimating Subbase Compaction: Soil beneath a 4,000-pound concrete slab must be compacted with a plate compactor. Soil bearing capacity must support 1,500 to 2,500 lbs/sq ft to prevent slab cracking.
- Overloading Flatbed Trailers: A pallet of concrete contains forty-two 80-pound bags (3,360 lbs) or fifty-six 60-pound bags (3,360 lbs). Confirm trailer axle ratings before forklifts load pallets.
Frequently Asked Questions
How much does 1 cubic foot of concrete weigh?
One cubic foot of standard cured concrete weighs between 145 and 150 pounds. Wet concrete weighs approximately 152 to 154 pounds per cubic foot.
How much does a full ready-mix truck weigh?
An empty 3-axle ready-mix truck weighs roughly 26,000 to 30,000 pounds. Loaded with 9 cubic yards of concrete (36,450 lbs), total gross vehicle weight reaches 62,000 to 66,000 pounds (31 to 33 US tons).
How much does a yard of dry gravel vs concrete weigh?
A cubic yard of gravel weighs between 2,600 and 2,900 pounds, whereas a cubic yard of cured concrete weighs approximately 4,050 pounds. Concrete is denser because cement paste fills the microscopic voids between sand and aggregate grains.
How many 80-pound bags equal 1 ton of concrete?
Twenty-five 80-pound bags equal 2,000 pounds (1 US ton). Because 1 cubic yard weighs roughly 4,000 pounds (2 tons), you need approximately 45 bags of 80-lb concrete to equal one cubic yard.
Does rebar significantly change the weight of a slab?
Yes. Mild steel rebar weighs 490 pounds per cubic foot. In heavily reinforced slabs with #4 rebar spaced at 12 inches on center in both directions, rebar adds approximately 1.5 to 2.5 pounds per square foot, or roughly 75 to 120 pounds per cubic yard.
Related Tools & Reference Tables
- Concrete Slab Calculator — Calculate cubic yards and bag counts
- Concrete Footing Calculator — Trench and pier volume estimation
- Rebar Weight Chart — Linear densities from #3 to #18 bars
- Gravel Weight Chart — Bulk density and tonnage for aggregates