Concrete Calculator
Easily calculate the concrete required for your project. Get estimates in multiple units – including volume, cubic yards, bags, and cost – for slabs, walls, footer, columns, steps, curbs, and more.
Square Slab
Results
Concrete Bags Needed
Cost Estimation
How to Use This Calculator?
Select Shape
Choose the shape of your choice.
Enter Dimensions
Provide measurements in cm, in, ft, or m.
Specify Quantity
Enter how many identical structure you need.
Calculate
Click calculate to see your results.
What is a Concrete Calculator?
A Concrete Calculator is a digital tool (usually a web or mobile app) that helps you quickly estimate how much concrete you’ll need for a construction project. Instead of manually doing math, it automates the calculation based on the shape, dimensions, and quantity of your project. This prevents overbuying or underbuying materials, saves money, reduces waste, and makes planning much easier.
Key Features
Precise Concrete Estimates
Get accurate volume calculations in just seconds.
Multiple Shape Support
Calculate for slabs, walls, columns, footings, steps, curbs, and more.
Flexible Units
Easily switch between Imperial (ft/in) and Metric (m/cm).
Bag Calculator
Instantly know how many 40, 60, or 80 lb bags you’ll need.
Cost Projection
Add price per yard/m³ to estimate your total project cost.
Easy & Mobile-Friendly
Works smoothly on desktop, tablet, and smartphone.
Why Choose Concrete Calc?
100% Free to use
No Downloads – Use in Browser
Always Updated & Accurate
Beginner-Friendly, Pro-Ready
Concrete Calculator Formulas for Different Concrete Forms
Different projects need different shapes, so the formula changes based on the type:
Calculate concrete volume of a Square Slab
Using measurements in feet:
Volume in Cubic Feet (ft3) = Width x Length x Depth
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Calculate concrete volume of a Round Slab
Using measurements in feet:
Area of the Circle (ft2) = Pi x (Diameter/2)^2
Volume in Cubic Feet (ft3) = Depth x Area
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Pi = 3.14
Calculate concrete volume of a Square Column
Using measurements in feet:
Volume in Cubic Feet (ft3) = Width x Length x Height
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Calculate concrete volume of a Round Column
Using measurements in feet:
Area of the Circle (ft2) = Pi x (Diameter/2)^2
Volume in Cubic Feet (ft3) = Height x Area
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Pi = 3.14
Calculate concrete volume of a Wall
Using measurements in feet:
Volume in Cubic Feet (ft3) = Thickness x Length x Height
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Calculate concrete volume of a Footer
Using measurements in feet:
Volume in Cubic Feet (ft3) = Width x Length x Depth
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Calculate concrete volume of Steps
Using measurements in feet:
Total steps include the platform
Platform Volume (ft³): Platform Depth × (Rise Height × Step Count) × Width
Each Step Volume (ft³): Run Depth × (Rise Height × Step Number) × Width
Total Volume (ft³): Platform Volume + Sum of Step Volumes
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Calculate concrete volume of Square Slab
Using measurements in feet:
Steps Count: Includes all steps plus the platform.
Platform Volume (ft³): Platform Depth × (Rise Height × Step Count) × Width
Step Volume (ft³): Run Depth × (Rise Height × Step Number) × Width
Total Volume (ft³): Platform Volume + Step Volumes
Volume in Cubic Yards (yd3) = Volume in Cubic Feet (ft3) / 27
Volume in Cubic Meters (m3) = Volume in Cubic Feet (ft3) x 0.0283
Lightweight, Fast & Accurate Extension
Add to Chrome Now!The Concrete Calculator Chrome Extension helps you quickly and accurately estimate the amount of concrete required for your construction projects – right from your browser. Perfect for Contractors, Engineers, DIY homeowners, and anyone planning a construction project.
Frequently Asked Questions
What is Concrete?
Concrete is a mix of cement, sand, gravel, and water that hardens into a strong building material used for foundations, slabs, walls, and more.
How is Concrete Calculated?
To calculate how much concrete you need, you measure the length, width, and depth of your project area, then multiply them to find the volume. The result is converted into cubic feet, cubic yards, or cubic meters to estimate the required concrete or bag count.
Why should I use a Concrete Calc instead of manual math?
Using a Concrete Calc is faster, more accurate, and eliminates guesswork. It can handle different shapes like slabs, walls, columns, and steps, while also giving you cost estimates if you enter the price per yard or per bag.
Can I use the Concrete Slab Calculator for other shapes?
Yes. While it’s designed for slabs, the calculator also supports walls, columns, footings, steps, curbs, and more. You just select the project type, enter the measurements, and get instant results.
Does the Concrete Bag Calculator support both Imperial and Metric units?
Absolutely! You can switch between Imperial (feet/inches) and Metric (meters/centimeters) to calculate concrete volume and bag requirements based on your preference.