Concrete Weight Calculator

1. Choose an input mode: enter a known volume and its unit, or switch to slab dimensions and give length, width and thickness.
2. Pick the concrete type for its density, or choose Custom density and enter your own pounds per cubic foot.
3. Optionally enter your vehicle payload to check whether the load fits your truck or trailer.
4. Read the weight in tons, pounds, kilograms and metric tonnes.

Here is what each result means:

A concrete weight calculator converts a volume of concrete into how much it weighs. It answers the practical questions behind a pour: can my trailer carry it, will the floor or formwork take the load, and how many tons am I moving?

It helps anyone hauling or supporting concrete: DIY builders loading a truck, contractors checking a slab load, and anyone pricing haulage by weight. Concrete is heavy and deceptively so, because a small volume hides a large mass. The tool makes that mass visible before you lift, load or pour.

Weight is simply volume times density. Normal-weight concrete runs about 145 to 150 pounds per cubic foot; lightweight mixes are nearer 110 to 115. The calculator finds the volume in cubic feet, multiplies by the density, then converts to tons, kilograms and tonnes.

1. Find the volume in cubic feet, from the figure you enter or from the slab dimensions.
2. Multiply by the density in pounds per cubic foot for the concrete type.
3. Divide by 2,000 for short tons, and multiply pounds by 0.4536 for kilograms.

Suppose you have 1 cubic yard of normal-weight concrete, and a trailer rated to 3,500 pounds.

Calculation: one cubic yard is 27 cubic feet, so weight = 27 x 150 = 4,050 lb, which is 2.03 short tons, about 1,837 kg. Against a 3,500 lb trailer that load is 550 lb over, so you would split it into two trips or order ready-mix delivery instead.

The lesson: concrete is heavier than it looks. A single cubic yard already exceeds many light trailers, which is exactly what the payload check is for.

Density of the Mix

Normal-weight concrete is about 145 to 150 pounds per cubic foot; lightweight aggregate mixes are 90 to 115. Density is the main driver of weight, so pick the type that matches your mix.

Reinforcement

Steel rebar and mesh add weight. Heavily reinforced concrete is nearer 150 pounds per cubic foot than plain concrete at 145, which is why the reinforced option is slightly higher.

Moisture

Fresh concrete is heavier than fully cured concrete because it still holds mixing water. The figures here are typical placed weights, not oven-dry weights.

Air and Aggregate

Air-entrained mixes and lightweight aggregates lower the density, while dense natural aggregates raise it. Use the custom density if you know your mix.

The two families differ mainly in the aggregate, and that changes both weight and use. Weight per cubic yard shows the gap clearly.

Lightweight concrete trades some strength for roughly a quarter less weight, which can decide what a structure or a vehicle can carry.

Hauling Concrete or Bags

Check the load against your truck or trailer payload before you fill it, using the payload field.

Checking a Structural Load

Estimate the dead load a slab or beam adds, as a first pass before an engineer confirms it.

Pricing Haulage or Disposal

When concrete is moved or disposed of by weight, convert the volume to tons to estimate the cost.

1. Underestimating How Heavy It Is

A single cubic yard is about two tons, more than many light trailers can legally carry. Always check the payload before loading.

2. Using the Wrong Density

Applying a normal-weight density to a lightweight mix, or the reverse, can be out by 25 percent. Match the type to your mix.

3. Ignoring Reinforcement

Rebar and mesh add weight that a plain-concrete figure misses. Use the reinforced or a custom density for heavily reinforced work.

4. Mixing Up Short Tons and Tonnes

A US short ton is 2,000 lb; a metric tonne is about 2,205 lb. The tool shows both, so quote the one your context uses.

5. Treating the Estimate as a Load Rating

Weight is not a structural check. Confirm what a floor, trailer or formwork can actually carry with its rating or an engineer.

The arithmetic is exact for the volume and density you enter; the real weight depends on your actual mix.

About 4,050 pounds, or roughly 2 short tons, for normal-weight concrete at 150 pounds per cubic foot. Plain concrete at 145 is about 3,915 pounds, and lightweight concrete about 3,105 pounds per cubic yard.

About 150 pounds for normal-weight concrete, or 145 for plain and 115 for lightweight. That is why a 94 pound bag of Portland cement is about one cubic foot but concrete, with its sand and gravel, is much heavier.

It depends on thickness. A 4 inch slab of normal concrete weighs about 50 pounds per square foot (150 pcf times one third of a foot). Enter the slab dimensions and the tool gives the total.

Normal-weight concrete is about 145 to 150 pounds per cubic foot, which is roughly 2,300 to 2,400 kilograms per cubic meter. Lightweight concrete is about 90 to 115 pounds per cubic foot. The exact figure depends on the aggregate and mix.

Often not. A cubic yard is about 4,050 pounds, which exceeds many half-ton trucks and light trailers once you include the mixer or barrow. Enter your payload rating and the tool flags whether the load fits.

A US short ton is 2,000 pounds; a metric tonne is 1,000 kilograms, about 2,205 pounds. The calculator shows both so you can use the one your supplier or regulations expect.

Slightly. Fresh concrete holds its mixing water, so it is a little heavier than fully cured and dried concrete. The figures here are typical placed weights, which is the conservative value for loading and transport.

Yes. Steel rebar and mesh add weight, so reinforced concrete is nearer 150 pounds per cubic foot than plain concrete at 145. For heavily reinforced sections, use the reinforced option or a custom density.

No. The calculation runs entirely in your browser and nothing you enter is stored or sent anywhere.

• American Cement Association (Portland Cement Association) (American Cement Association; concrete properties).
• National Ready Mixed Concrete Association (NRMCA; concrete materials and unit weight).
• QUIKRETE Concrete Mix product data (QUIKRETE; coverage and yield).
• QUIKRETE concrete and bag calculator (QUIKRETE; volume and yield method).