How Much Does Concrete Weigh? Density Reference Guide (pcf, lb/yd³, kg/m³)

How Much Does Concrete Weigh?

Normal-weight concrete weighs 150 pounds per cubic foot (lb/ft³) — equal to 4,050 lb per cubic yard, 2.025 short tons per cubic yard, or approximately 2,400 kg per cubic meter (kg/m³). This is the standard density used by structural engineers for building and infrastructure design in the United States under ACI 318-19 and ASTM C138.

That single number — 150 pcf — is your starting point for every concrete weight calculation, from a small pad to a full foundation pour.

Quick reference: 1 yd³ of normal concrete ≈ 4,050 lb ≈ 2.03 tons ≈ 1,837 kg. Use the Concrete Weight Calculator for instant results in any unit system.

Why Concrete Weight Matters

Knowing the weight of concrete is essential for:

Structural load calculations — beams, columns, and slabs must carry the dead load of the concrete itself before any live load is applied
Truck and pump planning — ready-mix trucks carry 8–10 yd³ per load; knowing weight helps verify axle limits
Crane and hoist sizing — precast elements are lifted by weight, not by volume
Subgrade bearing capacity — heavy slabs can exceed the bearing capacity of soft soils
Cost estimation — delivered concrete and waste hauling are sometimes priced by the ton
DIY planning — knowing that a contractor-size wheelbarrow holds roughly 200–250 lb of wet mix helps you plan rest breaks and pouring rhythm

Concrete Density Reference Table

The density (unit weight) of concrete varies with mix design, aggregate type, and water content. Use this table as your primary reference.

Concrete Type	Density (pcf)	Density (lb/yd³)	Density (kg/m³)	Typical Use
Normal weight	150	4,050	2,400	Slabs, footings, walls, columns (standard structural)
Lightweight (structural)	110–115	2,970–3,105	1,760–1,840	Long-span floors, precast, roof decks
Lightweight (non-structural)	90–100	2,430–2,700	1,440–1,600	Insulating fills, interior partitions
Heavyweight (radiation shielding)	200–250	5,400–6,750	3,200–4,000	Nuclear facilities, X-ray vaults
CLSM / Flowable fill	120–145	3,240–3,915	1,900–2,320	Trench backfill, abandoned utility voids
Pervious / No-fines	100–125	2,700–3,375	1,600–2,000	Stormwater management, driveways

Source: ACI 318-19 §19.2.4, ASTM C138-17a (Standard Test Method for Density of Fresh Concrete), ACI 211.1.

Design default: When the mix design is not yet specified, ACI 318-19 allows engineers to assume wc = 150 pcf for normal-weight concrete. Do not use a different default without structural justification.

Weight of Concrete by Volume — Worked Examples

Weight of 1 Cubic Foot of Concrete

1 ft³ of normal concrete weighs 150 lb (68 kg).

This is the most common quick-reference unit. A standard residential slab at 4 inches thick has a thickness of 0.333 ft, so:

Weight of 1 ft² of 4-inch slab = 150 × 0.333 = 50 lb per square foot

That's the dead load figure used in most residential structural checks (IRC floor loading tables start at 40 psf live load on top of a 50 psf concrete dead load).

Weight of 1 Cubic Yard of Concrete

1 cubic yard = 27 cubic feet

Weight = 27 × 150 = 4,050 lb = 2.025 short tons = 1,837 kg

So a single ready-mix truck load of 9 yards delivers:

9 × 4,050 = 36,450 lb (18.2 tons) of concrete — about the same as a fully loaded semi-truck.

Weight of 1 Cubic Meter of Concrete

1 m³ of normal concrete weighs 2,400 kg = 2.4 metric tons = 5,291 lb.

How Much Does 20 Yards of Concrete Weigh?

A 20-yard pour is a large residential or light commercial job — think a full driveway, a large garage floor, or a structural footing system.

Calculation:

20 yd³ × 4,050 lb/yd³ = 81,000 lb

Convert to tons: 81,000 ÷ 2,000 = 40.5 short tons

Convert to metric tons: 81,000 × 0.453592 ÷ 1,000 = 36.7 metric tons

That 20-yard pour would typically require 3 full truck loads (ready-mix trucks carry 8–10 yd³ per trip). If the trucks weigh 27,000 lb empty, each loaded truck weighs approximately 27,000 + (9 × 4,050) = 63,450 lb — check site access and driveway bearing capacity before scheduling delivery.

Common Pour Volumes and Weights at a Glance

Volume	Weight (lb)	Weight (short tons)	Weight (kg)
1 ft³	150	0.075	68
1 yd³ (27 ft³)	4,050	2.03	1,837
5 yd³	20,250	10.1	9,185
10 yd³	40,500	20.3	18,370
20 yd³	81,000	40.5	36,741
1 m³	5,291	2.65	2,400
5 m³	26,455	13.2	12,000

Skip the manual math — the Concrete Weight Calculator converts any volume (yd³, ft³, or m³) to weight in lb, tons, and kg in one click.

Dry Unit Weight vs. Freshly Mixed (Wet) Concrete Weight

A common source of confusion: does the phrase "unit weight of concrete" refer to fresh or hardened concrete?

Fresh (wet) concrete at 150 pcf — this is what you work with during a pour. It includes all mix water (water-cement ratio typically 0.45–0.55) plus the aggregate and cement.
Hardened concrete loses some mixing water to evaporation and chemical hydration. The dry unit weight is typically 145–147 pcf for normal concrete — about 2–3% less than fresh.

For structural dead load calculations, engineers use 150 pcf (fresh + reinforcement rounding) as a conservative design value — the slight loss from drying is more than offset by the weight of embedded rebar and wire mesh. ASTM C138-17a governs the field measurement of fresh concrete density using a strike-off container.

Concrete Weight by Bag Size

Bagged concrete mixes (Quikrete, Sakrete, Cemex, etc.) are sold by dry bag weight. When mixed with water, each bag produces a certain volume and total wet weight.

Bag Size (Dry)	Water Added (approx.)	Wet Weight	Yield	Weight per ft³
40 lb	~0.5–0.6 qt (1.1 lb)	~41 lb	0.30 ft³	~137 lb/ft³
50 lb	~0.9 qt (1.9 lb)	~52 lb	0.375 ft³	~138 lb/ft³
60 lb	~1.0 qt (2.1 lb)	~62 lb	0.45 ft³	~138 lb/ft³
80 lb	~1.25 qt (2.6 lb)	~83 lb	0.60 ft³	~138 lb/ft³

Why is the wet-mix density (~138 pcf) lower than the structural standard (150 pcf)? Bagged mixes use a slightly higher water-cement ratio than ready-mix concrete (for workability without a truck's drum), resulting in more air voids and slightly lower density. They're appropriate for DIY work — not for structural pours that require certified mix designs.

How Much Concrete Can a Wheelbarrow Hold?

A contractor-grade two-cubic-foot wheelbarrow is the most common tool for distributing concrete from a chute or pump to a form.

Wheelbarrow Type	Volume	Weight of Normal Concrete
Small / homeowner (2 cf)	2.0 ft³	300 lb
Contractor single-wheel (2–3 cf)	2.5 ft³	375 lb
Large contractor (3–4 cf)	3.5 ft³	525 lb

Practical reality: Most workers load a contractor wheelbarrow to about 60–70% capacity when moving heavy wet mix — so a 3.5 cf barrow typically carries about 2–2.5 cf (300–375 lb). A full 80% load (3 cf of concrete) weighs 450 lb including the empty barrow weight of ~50 lb — that's 500 lb being pushed by one person, which is physically demanding over multiple trips.

On a typical 1 yd³ pour (4,050 lb):

At 300 lb per wheelbarrow load (2 ft³), you'd make approximately: 27 ft³ ÷ 2 ft³ = 14 trips per yard of concrete

For a 5-yard pour (135 ft³), that's 68 wheelbarrow trips — plan breaks accordingly and ensure your chute placement minimizes travel distance.

What Does Cemex Concrete Weigh?

Cemex, one of the largest ready-mix producers in the United States and globally, supplies normal-weight concrete that meets ASTM C94 and ACI 318 density standards. Their standard structural mixes use the same 150 lb/ft³ (2,400 kg/m³) density assumed in ACI 318-19.

Cemex does not publish a single "weight" for their concrete because mix designs vary by:

Compressive strength (2,500 psi to 6,000+ psi residential; 10,000+ psi commercial)
Aggregate type and size (local limestone, granite, gravel, or lightweight expanded shale)
Admixtures (air entrainment, fly ash, slag can reduce density slightly)
Local aggregate specific gravity

For Cemex concrete ordered by the yard: assume 4,050 lb per yd³ (150 pcf) unless your Cemex project engineer provides a specific mix ticket with density data.

Cemex concrete/block calculator note: For quantity estimation on Cemex-supplied projects, the Concrete Weight Calculator on this site uses the same 150 pcf (2,400 kg/m³) baseline and accepts yd³, ft³, or m³ as input — the result is unit-independent of brand.

Frequently Asked Questions

What is the unit weight of concrete?

The unit weight (density) of normal-weight concrete is 150 pcf (pounds per cubic foot), which equals 4,050 lb/yd³ or 2,400 kg/m³. This is the standard design value per ACI 318-19 for reinforced concrete structures. Lightweight structural concrete ranges from 90–115 pcf depending on the aggregate used.

How much does 1 yard of concrete weigh?

One cubic yard of normal concrete weighs 4,050 lb (2.025 short tons or 1,837 kg). This comes directly from the unit weight: 27 ft³/yd³ × 150 lb/ft³ = 4,050 lb. A standard ready-mix truck carrying 9 yards delivers approximately 36,450 lb of concrete.

How much does 20 yards of concrete weigh?

20 cubic yards of concrete weighs 81,000 lb (40.5 short tons or 36.7 metric tons). That's the weight of roughly three fully loaded concrete trucks. For context, a typical pickup truck's payload is 1,500–2,000 lb — concrete is extremely dense material.

What does 1 cubic foot of concrete weigh?

One cubic foot of normal-weight concrete weighs 150 lb (68 kg). That means a 4-inch thick concrete slab weighs approximately 50 lb per square foot — which is a significant dead load that must be accounted for in floor and footing design.

What is the dry unit weight of concrete?

The dry unit weight of hardened concrete is typically 145–147 pcf — about 2–3% less than fresh concrete (150 pcf) due to evaporation of excess mix water during curing. For structural dead load calculations, the ACI 318-19 design standard conservatively uses 150 pcf to include the weight of embedded reinforcement.

Does wet concrete weigh more than dry concrete?

Yes. Fresh (wet) concrete weighs approximately 150 pcf, while fully hardened and dried concrete weighs 145–147 pcf. The difference is the unhydrated mix water that evaporates. In practice, structural engineers use 150 pcf for design regardless of cure state, as the weight of embedded rebar offsets the water loss.

How much concrete can a wheelbarrow hold?

A standard contractor wheelbarrow holds 2 to 3.5 cubic feet of wet concrete, which weighs 300 to 525 lb. In practice, workers load to 60–70% capacity (roughly 2–2.5 cf, or 300–375 lb per load) to avoid strain over multiple trips. A 1-yard pour requires approximately 14 wheelbarrow loads at a 2 cf fill level.

How heavy is a full wheelbarrow of concrete?

A fully loaded contractor wheelbarrow (3.5 cf) of wet concrete weighs approximately 525 lb of concrete plus the empty barrow weight (~50 lb) = 575 lb total. At that weight, it requires significant effort to push on uneven ground. Most workers keep loads under 400 lb (including barrow) for sustained manual work.

What does Cemex concrete weigh?

Cemex ready-mix concrete follows the same standard density as all structural-grade ready-mix: 150 pcf (2,400 kg/m³). Actual density may vary slightly by local aggregate and mix design, but for planning and estimation purposes, 4,050 lb per yd³ is the correct figure to use for any Cemex normal-weight mix.

How much does lightweight concrete weigh?

Structural lightweight concrete — made with expanded shale, clay, or slate aggregate (like Haydite or Rotary kiln LWA) — typically weighs 110 to 115 pcf (1,760–1,840 kg/m³), about 23–27% lighter than normal concrete. Non-structural insulating fills can go as low as 90 pcf. Lightweight concrete is specified on long-span structures where reducing dead load matters more than the modest strength trade-off.

How much does heavyweight concrete weigh?

Heavyweight concrete — made with barite, magnetite, or steel shot aggregate — ranges from 200 to 250 pcf (3,200–4,000 kg/m³), up to 67% heavier than normal concrete. It's used in radiation shielding applications: nuclear reactors, medical X-ray vaults, and industrial containment structures where mass is the shielding mechanism.

How do I calculate the weight of a concrete slab?

Use this formula:

Weight (lb) = Length (ft) × Width (ft) × Thickness (ft) × 150

Convert thickness to feet first (e.g., 4 inches = 0.333 ft). For example, a 12 ft × 20 ft slab at 4 inches thick weighs 12 × 20 × 0.333 × 150 = 11,988 lb (≈6 tons). For instant results in lb, tons, and kg across any unit system, use the Concrete Weight Calculator.

What is the weight of concrete per square foot at different thicknesses?

The weight per square foot depends on thickness:

2 inches thick: 150 × (2/12) = 25 lb/ft²
3 inches thick: 150 × (3/12) = 37.5 lb/ft²
4 inches thick: 150 × (4/12) = 50 lb/ft²
5 inches thick: 150 × (5/12) = 62.5 lb/ft²
6 inches thick: 150 × (6/12) = 75 lb/ft²

The 50 lb/ft² value for a 4-inch slab is the standard residential floor dead load used by structural engineers in ACI 318-19 calculations.

Why does concrete weight matter for subgrade design?

A concrete slab transfers its weight to the soil below. If the soil's bearing capacity (measured in tons per square foot) is too low relative to the combined dead load (slab + structure) plus live load, settlement or failure can occur. A 6-inch slab weighs 75 lb/ft², or 0.0375 tons/ft² — before any structural load is applied. This must be compared against the allowable soil bearing pressure from a geotechnical report.

Is there a calculator that converts volume to concrete weight?

Yes — the Concrete Weight Calculator on this site accepts volume input in yd³, ft³, or m³ and converts it to weight in lb, short tons, and kg. It supports normal-weight, lightweight, and bag-mix density presets, and outputs a print-ready summary you can save for your project file.

Use the Concrete Weight Calculator

For any volume of concrete — from a single cubic foot to a 50-yard commercial pour — the Concrete Weight Calculator gives you the exact weight in pounds, short tons, and kilograms in seconds. Enter your volume directly (no dimensions needed) and choose your concrete type:

Normal weight — 150 pcf / 4,050 lb·yd⁻³ / 2,400 kg·m⁻³
Lightweight — 110 pcf / 2,970 lb·yd⁻³ / 1,760 kg·m⁻³
Bag mix — density adjusted for bagged pre-mix yield

It's free, requires no sign-up, and produces a print-ready output suitable for project documentation.

Visit Concrete Calculator Max for full concrete estimation tools, calculators, and reference guides.

Summary

Normal concrete weighs 150 lb per cubic foot — a constant you'll use throughout any concrete project:

1 ft³ = 150 lb
1 yd³ = 4,050 lb (2.03 tons)
20 yd³ = 81,000 lb (40.5 tons)
1 m³ = 2,400 kg (2.4 metric tons)
1 wheelbarrow load (2 cf) ≈ 300 lb wet mix

Lightweight concrete drops to 110–115 pcf; heavyweight shielding concrete runs 200–250 pcf. Bag mixes come in slightly under 150 pcf due to higher water-cement ratios. For any quick conversion, the Concrete Weight Calculator handles all unit systems and density presets instantly.