Planning a DIY patio, driveway, or foundation? Our free Concrete Calculator helps you determine exactly how much concrete you need in cubic yards, cubic feet, or cubic meters. It also estimates the number of 60lb or 80lb pre-mix bags required, saving you from buying too much or running out mid-pour.
Privacy Protected
Concrete Calculator
Calculate concrete volume and bags for slabs, footings, and columns
Share Tool
Project Details
Estimated Materials
Enter dimensions to see material estimates
About Calculate Concrete Volume & Bags Instantly
1
Select Shape
Choose between Slab (Rectangle), Footing (Square), or Column (Round).
2
Enter Dimensions
Input length, width, and depth (thickness). You can mix units like feet and inches.
3
Check Results
See total volume in cubic yards and estimated bag count.
Key Features
Multiple Shapes
Calculate for rectangular slabs, round columns, and square footings.
Bag Estimator
Instantly see how many 60lb or 80lb bags you need.
Waste Factor
Includes option to add 5-10% for spillage and uneven subgrades.
Frequently Asked Questions
For a 10x10 slab at 4 inches thick, you'd need roughly 1.23 cubic yards, which is about 74 bags of 60lb pre-mix or 56 bags of 80lb mix.
Yes, it's standard practice to order 5-10% extra to account for spillage, uneven ground, and form bowing.
Multiply Length (ft) × Width (ft) × Depth (ft) to get cubic feet, then divide by 27 to get cubic yards.
Related Tools
View allMerge PDF
Combine multiple PDFs into one unified document.
Word Counter
Count words and chars.
Unit Converter
Convert length, weight, etc.
Image Converter
Convert between JPG, PNG, WEBP, and BMP.
Password Generator
Generate strong, secure passwords.
QR Code Generator
Create QR codes.
Last updated on