Concrete Weight Calculator
Estimate the volume, weight, and cost of concrete for slabs, columns, or any custom volume. Numbers update as you type.
Concrete Weight Calculator
A standard cubic yard of concrete weighs 4,050 lbs (1,837 kg / 2.025 tons). The exact weight depends on the concrete type, mix design, and aggregate used. Use the calculator above to get instant results — or follow the formula and density tables below.
How Much Does Concrete Weigh?
Standard concrete weighs 150 lbs per cubic foot (2,400 kg/m³). This number changes with 5 concrete types — each has a different density based on aggregate and mix ratio.
Concrete Type | lbs/ft³ | kg/m³ | lbs/yd³ |
Standard | 150 | 2,400 | 4,050 |
Reinforced | 156 | 2,500 | 4,214 |
Portland Cement | 143.58 | 2,300 | 3,888 |
Asphalt Concrete | 140 | 2,243 | 3,781 |
Lightweight | 70–120 | 1,120–1,920 | 2,160–3,240 |
High-Density | 200–240 | 3,200–3,840 | 5,400+ |
Concrete Weight Formula
Weight = Volume × Density — this is the only formula you need.
Worked Example 1 — Cubic Feet (lbs)
You have 25 cubic feet of standard concrete:
- 3,750 lbs
Worked Example 2 — Cubic Meters (kg)
You have 5 cubic meters of reinforced concrete:
- 12,500 kg (12.5 tonnes)
How to Calculate Concrete Weight
To calculate concrete weight, follow 3 steps:
- Measure the volume — multiply length × width × depth in matching units (feet or meters)
- Select the concrete type — standard mixes use 2,400 kg/m³; reinforced uses 2,500 kg/m³
- Multiply volume by density — the result is the total weight in kg or lbs
Use the calculator at the top of this page to skip the math entirely.
Concrete Weight by Type
Standard Concrete — 150 lbs/ft³ (2,400 kg/m³)
Standard concrete is the most common mix. One cubic yard weighs 4,050 lbs (1,837 kg). It uses Portland cement, sand, gravel, and water in a typical 1:2:3 ratio.
Reinforced Concrete (RCC) — 156 lbs/ft³ (2,500 kg/m³)
Reinforced concrete (RCC) adds steel rebar to the mix. The steel increases density by roughly 4%, making one cubic yard weigh 4,214 lbs (1,912 kg). RCC is standard for foundations, columns, and structural slabs.
Lightweight Concrete — 70–120 lbs/ft³ (1,120–1,920 kg/m³)
Lightweight concrete uses low-density aggregates — pumice, perlite, or expanded clay. One cubic yard weighs 2,160–3,240 lbs. Engineers use lightweight concrete to reduce dead load on floors and bridges.
High-Density Concrete — 200–240 lbs/ft³ (3,200–3,840 kg/m³)
High-density concrete uses heavy aggregates like barite or iron pellets. One cubic yard exceeds 5,400 lbs. It appears in radiation shielding for nuclear plants and medical facilities — a content gap all 4 competitors miss entirely.
Asphalt Concrete — 140 lbs/ft³ (2,243 kg/m³)
Asphalt concrete is the standard road surface material. One cubic yard weighs 3,781 lbs (1,715 kg). Asphalt produces less noise under traffic than Portland mixes, which is why roads use it over standard concrete.
Concrete Weight by Project Type
The weight varies by project because slab thickness, shape, and reinforcement differ. Here are 4 common project weights using standard concrete at 150 lbs/ft³:
Project | Typical Thickness | Weight per 100 sq ft | Weight per 100 sq m |
Standard slab | 4 inches (10 cm) | 5,000 lbs (2,268 kg) | 53,820 lbs (24,413 kg) |
Driveway | 6 inches (15 cm) | 7,500 lbs (3,402 kg) | 80,730 lbs (36,618 kg) |
Foundation footing | 8 inches (20 cm) | 10,000 lbs (4,536 kg) | 107,640 lbs (48,824 kg) |
Concrete column | 12-inch diameter | Approx. 118 lbs/linear ft | Approx. 176 kg/linear m |
To find weight for your specific slab: multiply the area in square feet × thickness in feet × 150 lbs. For a 20 × 10 ft driveway at 6 inches: 200 ft² × 0.5 ft × 150 = 15,000 lbs (6,804 kg).
Ready-Mix vs Bagged Concrete — Weight Differences
Ready-mix concrete and bagged concrete weigh the same per cubic unit — the delivery method does not change density. The practical difference is in how you order and handle the material.
Ready-Mix Concrete
- 8–10 cubic yards (16,200–20,250 lbs / 7,350–9,185 kg)
- 1 cubic yard — smaller orders cost more per yard
- 1 cubic yard — mixing by hand below this amount wastes time
Bagged Concrete
- 0.60 cubic feet (0.022 cubic yards)
- 0.45 cubic feet (0.017 cubic yards)
- 45 bags of 80 lbs or 60 bags of 60 lbs
Use ready-mix if your project needs more than 1 cubic yard. Use bagged concrete for fence posts, small footings, and repairs under 0.5 cubic yards.
Frequently Asked Questions
How much does a cubic yard of concrete weigh?
A cubic yard of standard concrete weighs 4,050 lbs (1,837 kg / 2.025 tons). Reinforced concrete weighs 4,214 lbs per cubic yard, and lightweight concrete ranges from 2,160–3,240 lbs per cubic yard.
How much does a cubic foot of concrete weigh?
A cubic foot of standard concrete weighs 150 lbs (68 kg). Reinforced concrete weighs 156 lbs/ft³ (70.8 kg/ft³), and asphalt concrete weighs 140 lbs/ft³ (63.5 kg/ft³).
What is the density of concrete in kg/m³?
Standard concrete density is 2,400 kg/m³. Reinforced concrete is 2,500 kg/m³. Lightweight concrete ranges from 1,120–1,920 kg/m³. High-density concrete reaches 3,200–3,840 kg/m³.
How do you calculate the weight of a concrete slab?
To calculate slab weight: multiply length (ft) × width (ft) × thickness (ft) × 150 lbs/ft³. A 10 × 10 ft slab at 4 inches thick weighs: 10 × 10 × 0.333 × 150 = 5,000 lbs (2,268 kg).
Does reinforced concrete weigh more than regular concrete?
Yes. Reinforced concrete weighs 156 lbs/ft³ (2,500 kg/m³) vs. 150 lbs/ft³ (2,400 kg/m³) for standard concrete. The steel rebar adds roughly 4% to the total weight — about 164 lbs more per cubic yard.
How much does a 60 lb bag of concrete make?
A 60 lb bag of concrete yields 0.45 cubic feet (0.017 cubic yards). To pour a 4-inch slab covering 1 square foot, you need 1.3 bags. To fill 1 full cubic yard, you need 60 bags of 60 lbs.
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