Concrete Weight Calculator

What is a concrete weight calculator?

A concrete weight calculator turns a known volume of concrete into how much that concrete weighs. You enter the volume and pick its unit, cubic feet, cubic yards, or cubic meters, and the calculator returns the weight in pounds, US tons, and kilograms. This matters when you are sizing a trailer or truck for hauling, checking a load against an elevator or floor rating, or estimating the mass a foundation has to support.

How does it work?

Weight is volume multiplied by density. Standard cured concrete has a density of about 150 pounds per cubic foot, which is the figure this calculator uses. To keep the math consistent, the volume is first converted to cubic feet: a cubic yard is 27 cubic feet, and a cubic meter is about 35.3147 cubic feet. The volume in cubic feet is then multiplied by 150 to get pounds. US tons come from dividing pounds by 2,000, and kilograms come from multiplying pounds by 0.453592.

Formula

For a volume $V_{ft^3}$ expressed in cubic feet, the weight in pounds is:

$W_{lb} = V_{ft^3} \times 150$

If the volume is given in other units, convert it first:

$V_{ft^3} = V_{yd^3} \times 27 \qquad V_{ft^3} = V_{m^3} \times 35.3147$

The weight in US tons and kilograms follows directly:

$W_{tons} = \frac{W_{lb}}{2000} \qquad W_{kg} = W_{lb} \times 0.453592$

Worked examples

Example 1: one cubic foot

$W_{lb} = 1 \times 150 = 150 \ \text{lb}$

That is $150 / 2000 = 0.075$ US tons, or $150 \times 0.453592 = 68.04$ kilograms.

Example 2: one cubic yard

A cubic yard is 27 cubic feet, so:

$W_{lb} = 27 \times 150 = 4050 \ \text{lb}$

which is $4050 / 2000 = 2.025$ US tons.

Example 3: one cubic meter

A cubic meter is about 35.3147 cubic feet, so:

$W_{lb} = 35.3147 \times 150 \approx 5297 \ \text{lb}$

That is roughly 2.65 US tons, or about 2,400 kilograms, which is why concrete is often quoted at a metric density near 2,400 kg/m³.

Practical notes

• The 150 lb/ft³ figure is for normal-weight cured concrete. Freshly poured wet concrete is a little heavier, and lightweight or aerated mixes can run well below 150 lb/ft³, so adjust if your mix is unusual.
• If you only know the slab dimensions rather than the volume, compute the volume first with a concrete volume calculator, then bring the result here.
• For hauling, compare the total weight against your vehicle’s payload rating, not just the volume, since a single cubic yard already weighs about two US tons.
• Reinforcing steel, aggregate type, and moisture content all shift the real density slightly; treat the result as a solid planning estimate rather than an exact scale reading.