United States · pounds and short tons
Concrete Weight Calculator
Estimate how much a known amount of concrete weighs, in pounds and US short tons. Type a volume in cubic feet or cubic yards, or type the length, width, and thickness of a rectangle. For another shape, use the home calculator to get the volume, then type that volume here.
How much does concrete weigh?
Multiply cubic feet by density in pounds per cubic foot. One cubic yard is 27 cubic feet, so one yard at 150 lb/ft³ weighs 4,050 pounds, or 2.025 US short tons. That 150 is an editable assumption for normal-weight concrete, not your measured mix. Rebar is extra unless your density already includes it.
How do I use this concrete weight calculator?
Multiply the volume in cubic feet by a density in pounds per cubic foot.
- Choose whether you already know the volume, or you know length, width, and thickness.
- If you know the volume, choose cubic feet or cubic yards and type the number. One cubic yard is 27 cubic feet.
- Check the density. 150 pounds per cubic foot is an editable assumption for typical normal-weight concrete. Type another number if you have the product’s density.
- Choose Calculate. The weight is the volume times that density. No spare allowance is added.
Volume and density
Results
The volume used, the density used, and the estimated weight appear here.
Estimated weight
Pounds and US short tons describe the same mass. One short ton is 2,000 pounds.
- Pounds
- Not calculated
- US short tons
- Not calculated
What was used
- Volume used
- Not calculated
- Same volume in cubic yards
- Not calculated
- Density used
- Not calculated
- Estimated weight
- Not calculated
- Estimated weight in US short tons
- Not calculated
How the weight was figured
Weight appears here after you calculate. No spare allowance is added.
How is concrete weight figured?
Weight in pounds equals cubic feet times density in pounds per cubic foot. Divide pounds by 2,000 to get US short tons.
- 1 cubic yard = 27 cubic feet.
- 1 US short ton = 2,000 pounds.
- A short ton is the ton used here. It is not a metric tonne (about 2,204.6 pounds) and not a long ton (2,240 pounds).
What does one cubic yard of concrete weigh?
At the 150 lb/ft³ starting assumption, 1 cubic yard weighs 4,050 pounds, which is 2.025 US short tons.
1 cubic yard at the 150 lb/ft³ assumption
- 1 cubic yard = 27 cubic feet.
- 27 × 150 = 4,050 pounds.
- 4,050 ÷ 2,000 = 2.025 US short tons.
10 ft by 12 ft slab, 4 inches thick, at 150 lb/ft³
- Thickness is 4 ÷ 12 = 1/3 foot.
- Volume is 10 × 12 × 1/3 = 40 cubic feet. That is 40 ÷ 27 cubic yards.
- 40 × 150 = 6,000 pounds.
- 6,000 ÷ 2,000 = 3 US short tons.
No extra percent is added for waste or ordering. The home page can add an allowance when you are buying concrete. This page estimates the mass of the volume you enter.
Where does 150 pounds per cubic foot come from?
It is a common planning figure for normal-weight concrete in US design references, and it is an editable assumption on this page, not a measurement of your mix.
150 lb/ft³ is a common planning number for normal-weight concrete in US design references. An ACI 318 footing example uses a concrete density of 150 lb/ft³, and an ACI discussion of ASCE/SEI 7 lists concrete at 150 pcf in the commentary table of material densities used for design dead loads. ACI 318 also uses about 145 lb/ft³ when it needs the weight of the concrete material itself, without reinforcement, for a property such as stiffness.
This page starts at 150 so the box is not empty, and you can change it. It does not measure your concrete. Fresh concrete is weighed by a test such as ASTM C138, and that test does not prescribe 150. Hardened concrete can differ because of aggregates, air, and moisture. Reinforcement, forms, and other materials are not included unless their weight is already inside the density you type. Do not treat the result as a lifting, hauling, or load-rating approval.
- ACI 318 footing example, which states a concrete density of 150 lb/ft³.
- ACI presentation citing ASCE/SEI 7 commentary Table C3-2, which lists concrete at 150 pcf for design dead-load densities.
- ASTM C138/C138M, the test method for density of freshly mixed concrete. It is a way to measure a batch. It is not a fixed density.
What do people ask about concrete weight?
Is 150 pounds per cubic foot the weight of my concrete?
No. It is a starting assumption for typical normal-weight concrete. Your mix sheet or a fresh-concrete density test can be higher or lower. Type that number if you have it.
Does this include rebar or mesh?
No. The result is volume times the density you enter. Steel and other separate pieces are not added. Some published 150 lb/ft³ figures are used for reinforced-concrete dead load and already intend a little steel. If you need the steel counted exactly, add that weight yourself. This page will not do it for you.
What is a short ton?
A US short ton is 2,000 pounds. A metric tonne is about 2,204.6 pounds. A long ton is 2,240 pounds. This page uses the short ton only.
How is this different from the other calculators?
The home page estimates how much concrete to order, in cubic yards and bags. The block page counts masonry blocks on a wall face. The materials page splits a volume into loose cement, sand, and stone. This page estimates mass from a volume and a density. It does not add a waste allowance, and it does not count blocks.
Can I enter lightweight or heavyweight concrete?
Yes, if you know the density and it is from 50 to 400 pounds per cubic foot. This page does not offer extra preset densities, because those would not describe every product.
What does this weight calculator refuse to decide?
It multiplies volume by the density you type. It is not permission to lift, haul, or design a structure.
- The result is an estimate of mass from the volume and density you enter. It is not a strength, lifting, hauling, or structural approval.
- 150 lb/ft³ is an assumption you can edit. It is not a measured fresh or hardened density.
- Air, moisture, aggregate, and reinforcement can change the real mass. They are included only to the extent they are already in your density.
- Only cubic feet, cubic yards, pounds, and US short tons are calculated. Metric sizes are not accepted.
- A known volume can be up to 100,000 cubic yards. A rectangle can be up to 1,000 feet long, 1,000 feet wide, and 100 feet thick. Density can be from 50 to 400 pounds per cubic foot. These are limits of this page.
- No ordering waste is added, and the volume is not rounded up to a supplier increment.