The Ultimate Concrete Calculator
Effortlessly estimate materials, volume, and costs for your next project. Accurate, fast, and free.
Start Calculating Now1. Enter Dimensions
Select your unit system and shape.
2. Get Results
Your results will appear here.
Enter dimensions and press Calculate.
Why Use Our Concrete Calculator?
From DIY patio projects to professional construction footings, accuracy is key. Here's how our tool helps you succeed.
Save Money
Avoid over-ordering materials. Our precise calculations ensure you buy only what you need, reducing waste and saving you money.
Save Time
Get instant estimates for volume, materials, and cost without complex manual calculations. Plan your project schedule more effectively.
Plan Accurately
Whether you're pouring a simple slab or need to figure out the correct size and volume for structural supports, our tools can help. Check out our specialized concrete footing calculator for detailed foundation planning.
Explore Our Specialized Calculators
Find the perfect tool for your specific project needs.
Slab Calculator
Perfect for patios, floors, and foundations. Calculate volume and materials for any rectangular concrete slab.
Footing Calculator
Estimate concrete for wall footings or foundation pads. Ensures a stable and secure base for your structures.
Column Calculator
Calculate concrete volume and material needs for round columns, piers, and Sonotubes.
Rebar Calculator
Determine the amount of rebar needed for your concrete slabs and footings.
Stairs Calculator
Estimate concrete volume for your concrete steps and staircases.
Concrete Bag Calculator
Working with pre-mixed bags? Calculate exactly how many bags of concrete mix you'll need for your project.
Quikrete Bag Calculator
Specifically for Quikrete products. Calculate the number of Quikrete bags needed for your project.
Learn More About Concrete
Check out our guides to help you plan and execute your project perfectly.
How to Calculate Concrete: A Step-by-Step GuideHow It Works in 3 Simple Steps
Select Units & Shape
Choose between Imperial (ft, lb) and Metric (m, kg) systems. Then, select the shape of your pour—a rectangular slab or a circular column.
Enter Dimensions
Input the length, width, and thickness for slabs, or the radius and height for columns. Select the desired concrete strength (grade).
Get Instant Results
Click 'Calculate' to see the required volume, a detailed list of materials (cement, sand, gravel), and a full cost breakdown.
Everything You Need in One Place
Dual Unit System
Seamlessly switch between Imperial (yards³, feet, pounds) and Metric (meters³, kilograms) units to match your project's requirements.
Material Breakdown
Get a detailed list of the required materials, including the exact amount of cement (in bags), sand, and gravel needed for your specific concrete grade.
Comprehensive Cost Estimation
Our calculator provides a full cost analysis, breaking down expenses for materials and labor to help you budget accurately.
Calculation History
Save your recent calculations directly in your browser. Easily access and compare estimates for different parts of your project.
Trusted by Builders and DIYers
"This calculator is a lifesaver. It's simple, accurate, and the cost estimation helped me stay on budget for my new patio."
- John D., Homeowner
"As a small contractor, time is money. This tool gives me quick estimates on-site. The history feature is brilliant for managing multiple jobs."
- Maria Garcia, MG Construction
"Finally, a concrete calculator that's easy to use on mobile and provides all the details I need. Highly recommended."
- David Chen, DIY Enthusiast
Simple and Transparent
Our core calculator is, and always will be, free. We believe in providing value to the construction community.
Free
$0 / forever
- Unlimited calculations
- Material & cost estimates
- Local history storage
- Standard concrete grades
Frequently Asked Questions
Answers to common questions about concrete calculations.
What do the concrete grades (C15, C20, C25) mean?
The 'C' stands for Compressive strength...
How accurate is this calculator?
Our calculator uses standard industry formulas...
Can I use this for both ready-mix and hand-mixing?
Yes. The results show the total volume needed, which you can order from a ready-mix supplier. The material breakdown (cement, sand, gravel) is for those who prefer to mix it themselves. For smaller jobs, you might use pre-mixed bags.
Try our Concrete Bag Calculator to find out exactly how many bags you need.
Are the prices in the cost estimation current?
The prices used are based on general market averages...