Introduction
The Concrete Weight Calculator helps you find out how much your concrete weighs. Just enter the size of your slab, footing, or any concrete shape, and the tool calculates the weight. You can type in the volume directly, use area and depth, or enter length, width, and depth. It works with both US and metric units. You can also pick from seven concrete types, like standard, lightweight, or reinforced, and the calculator adjusts the density for you. If you're working with broken concrete or rubble, switch to rubble mode and the tool cuts the density in half to account for air gaps. The results show weight in pounds, kilograms, and tons, plus full volume conversions and helpful charts.
How to Use Our Concrete Weight Calculator
Enter your concrete dimensions and settings below. The calculator will instantly show you the total weight in pounds, kilograms, and tons, plus full volume conversions.
Dimensions Tab: Pick how you want to enter your concrete size. Choose "Volume" if you already know the cubic feet or cubic yards. Choose "Area + Depth" if you know the surface area and thickness. Choose "L × W × D" to type in length, width, and depth separately. Choose "Sq Ft Quick" if you just know the square footage and slab thickness in inches.
Volume: Type the total volume of your concrete and select the unit from the dropdown. You can use cubic inches, cubic feet, cubic yards, cubic centimeters, or cubic meters.
Area + Depth: Type the surface area in the first box and pick your unit. Then type the depth or thickness in the second box and pick its unit. The calculator will multiply them to get the volume.
Length × Width × Depth: Type each measurement in its own box. You can mix units across all three fields. For example, use feet for length and width but inches for depth.
Sq Ft Quick: Type your area in square feet and your slab thickness in inches. This is the fastest option for standard concrete slabs.
Concrete Type: Select the type of concrete you are using. Each type has a different density. Options include Standard Portland, Lightweight, High-Density, Asphalt, Gravel, Limestone, and Reinforced concrete.
Concrete State: Choose "Solid / Intact" for poured or cured concrete. Choose "Broken / Rubble" for demolished concrete. Rubble weighs about half as much as solid concrete because of air gaps between the pieces.
Density: This field auto-fills based on your concrete type and state. You can type in a custom density in pounds per cubic foot if you know the exact value. The bar below shows where your density falls within the typical range.
Calculate Button: Press "Calculate" to see your results. The calculator shows weight in pounds, kilograms, US tons, metric tonnes, ounces, and grams. It also shows volume in cubic feet, cubic yards, cubic inches, cubic meters, cubic centimeters, and liters.
Reset Button: Press "Reset" to clear all fields and return every setting to its default value.
What Is a Concrete Weight Calculator?
A concrete weight calculator helps you figure out how heavy a slab, block, or any amount of concrete will be. You enter the size of your concrete (either as a volume, an area with thickness, or length × width × depth), and the calculator tells you the total weight in pounds, kilograms, and tons.
Why Does Concrete Weight Matter?
Knowing the weight of concrete is important for construction projects of all sizes. You need it to plan how much a truck can carry, whether a floor or structure can support the load, and how much material to order. A standard concrete slab that is 10 feet by 10 feet and 4 inches thick weighs close to 5,000 pounds. That is a lot of weight, so getting the number right matters.
How Much Does Concrete Weigh?
The weight of concrete depends on its type and density. Normal-weight concrete weighs about 140 to 150 pounds per cubic foot.1 Structural lightweight concrete weighs about 90 to 120 pounds per cubic foot.1 High-density concrete can weigh 175 to 250 pounds per cubic foot. Reinforced concrete, which has steel bars inside, weighs about 150 to 165 pounds per cubic foot.
Solid vs. Broken Concrete
Broken concrete, also called rubble, weighs less per cubic foot than solid concrete. This is because rubble has air gaps between the pieces. A good rule of thumb is that rubble weighs about 50% less than the same volume of solid concrete. This matters when you are hauling away demolished concrete or filling a dumpster.
Common Concrete Types
- Standard / Portland Concrete: The most common type used for sidewalks, driveways, and foundations.
- Lightweight Concrete: Used where lower weight is needed, like upper floors of buildings.
- High-Density Concrete: Used for radiation shielding and counterweights.
- Asphalt Concrete: Used for roads and parking lots.
- Gravel Concrete: Uses gravel as the main aggregate.
- Limestone with Portland: A mix that uses crushed limestone.
- Reinforced Concrete: Standard concrete with steel rebar added for extra strength.
Quick Reference: Concrete Weight Per Cubic Foot
A cubic yard is 27 cubic feet.2 Using 146.5 pounds per cubic foot for standard concrete, one cubic yard weighs roughly 3,950 pounds, or just under 2 US tons. These numbers give you a fast way to estimate weight on the job site without a calculator.