How this calculator works
Calculate concrete volume, wet weight and estimated cement bags for slabs, footings and general pours.
V = L × W × D; order volume = V × (1 + waste%)
Concrete · Calculator
Calculate concrete volume, wet weight and estimated cement bags for slabs, footings and general pours.
Calculate concrete volume, wet weight and estimated cement bags for slabs, footings and general pours.
The calculator uses the following core relationship:
Estimating note: Actual material quantities can vary with site conditions, detailing, product dimensions, installation method, and waste.
A concrete calculator helps estimate the amount of concrete required for slabs, footings, foundations and general construction pours. By entering the project dimensions, you can quickly calculate concrete volume, account for waste and estimate the required material quantity.
The required concrete volume depends mainly on the length, width and depth of the pour area. Always measure the actual project dimensions and include a waste allowance because site conditions, formwork and placement methods can affect the final quantity.
For ordering purposes, the required quantity is usually increased by a waste percentage to reduce the risk of running short during construction.
Example: A concrete slab measuring 5 m long, 4 m wide and 0.15 m deep requires:
Adding waste allowance helps create a safer ordering estimate.
Construction tip: Confirm dimensions, concrete mix requirements, supplier units and site conditions before placing an order.
Concrete is commonly measured in cubic meters (m³) or cubic yards (yd³). Use this quick reference table to compare common concrete volumes.
| Cubic Meters (m³) | Cubic Yards (yd³) |
|---|---|
| 1 m³ | 1.31 yd³ |
| 2 m³ | 2.62 yd³ |
| 5 m³ | 6.54 yd³ |
| 10 m³ | 13.08 yd³ |
Note: Concrete weight depends on the concrete density, mix design and project specifications. Always confirm final quantities with your supplier.
Calculate concrete volume, wet weight and estimated cement bags for slabs, footings and general pours.
The calculator uses inputs such as Length (m), Width (m), Depth (m), Waste allowance (%), and Concrete density (kg/m³). Use values from your drawings, measurements, product data, or project specifications.
Use outputs such as Concrete volume, Volume incl. waste, Concrete weight, and Cement bags for estimating and cross-checking. Before purchasing or construction, confirm the dimensions, units, waste factors, supplier packaging, and project specifications.
Continue your estimate with related Construction Calc Lab.