Concrete Weight Calculator
This concrete weight calculator tells you how much your concrete weighs in pounds, US tons, and kilograms. Enter the dimensions — or a known volume — and adjust the density for lightweight mixes. It answers the common question of how much does a yard of concrete weigh and helps you plan transport and structural loads.
How to use this calculator
- Enter the length, width, and thickness of the element.
- Leave density at 150 lb/ft³ for normal concrete, or lower it (90–115) for lightweight mixes.
- Read the weight in pounds, tons, and kilograms.
- Use it to check trailer limits, floor loading, or lifting requirements.
The formula
Weight is volume multiplied by density. Normal-weight concrete is about 150 pounds per cubic foot, which is 4,050 pounds per cubic yard:
Weight (lb) = Volume (ft³) × Density (lb/ft³)
Worked example. A 9 ft × 9 ft slab at 4 inches thick is 9 × 9 × 0.333 = 27 cubic feet — exactly one cubic yard. At 150 lb/ft³ that is 27 × 150 = 4,050 pounds, or about 2.03 US tons (1,837 kg).
Frequently asked questions
How much does a yard of concrete weigh?
A cubic yard of normal-weight concrete weighs about 4,050 pounds — just over 2 US tons — at the standard 150 lb per cubic foot density.
How much does a cubic foot of concrete weigh?
Roughly 150 pounds per cubic foot for standard concrete. Lightweight mixes run 90–115 lb/ft³, which you can set with the density field.
Does concrete weigh more wet or dry?
Freshly mixed concrete is slightly heavier because of the mix water. As it cures some water is consumed by hydration and some evaporates, so cured concrete is a little lighter.
Why does concrete weight matter?
Weight tells you whether a trailer, floor, or footing can carry the load and how much the finished element will weigh. It is essential for transport and structural planning.