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CalcRiver

Concrete Weight Calculator

Calculate the weight of concrete slabs, walls, and footings instantly. Determine the total mass in pounds, kilograms, and tons based on dimensions and density.

1. Dimensions

2. Concrete Density

Using standard density: 145 lb/ft³

This concrete weight calculator helps engineers, contractors, and DIYers estimate the load of concrete structures. Whether you are checking if a truck can handle the payload or ensuring your formwork is strong enough, knowing the weight is critical.

How to Calculate Concrete Weight by Dimensions

To use this tool as a concrete weight calculator by dimensions, follow these steps:

  1. Determine Volume: Multiply Length × Width × Thickness to get the cubic volume.
  2. Identify Density: Standard concrete weighs approximately 145 lbs per cubic foot (or 3,915 lbs per cubic yard).
  3. Calculate Mass: Multiply the volume by the density.

For example, a slab that is 10ft x 10ft x 4in has a volume of roughly 1.23 cubic yards. Using a standard density, it would weigh about 4,833 lbs.

Concrete Weight Per Cubic Yard

A common question in the industry is "how heavy is a yard of concrete?".

  • Standard Mix: ~4,000 lbs (2 tons) per cubic yard.
  • Reinforced Concrete: ~4,100 lbs per cubic yard (due to steel rebar).
  • Lightweight Concrete: ~2,700 - 3,000 lbs per cubic yard.

If you need to find the total volume for ordering, use our Concrete Volume Calculator first.

Using the Concrete Density Calculator Feature

This tool also functions as a concrete density calculator. If you are using a specialized mix (like gyp-crete or high-strength concrete), select "Custom Density" and input the specific weight from your supplier's datasheet. This is essential for precision engineering tasks or when lifting precast elements with a crane.

Planning a large pour? Don't forget to check the required materials with our Concrete Slab Calculator to ensure you order enough yardage.

? Frequently Asked Questions

It weighs roughly the same! Adding water activates the cement, but the cured weight is very close to the dry weight plus the weight of retained water, usually around 145 lbs per cubic foot once set.

Standard concrete weighs approximately 145 to 150 pounds per cubic foot.

Yes, adding steel rebar or mesh increases the density. Reinforced concrete is typically estimated at 150 lbs/ft³ (approx 2,400 kg/m³).

This calculator helps estimate the dead load of the slab itself. For industrial traffic design, you need to calculate the live load capacity, which depends on slab thickness and compressive strength (PSI).