Built for real work
Cubic yards and bag estimates for ordering.
Concrete Calculator — Cubic Yards, Volume & Bags
Estimate concrete volume in cubic feet and cubic yards for slabs, footings, and driveways. Free online concrete calculator with bag estimates.
Formula used
Volume (ft³) = Length × Width × Depth Cubic yards = ft³ ÷ 27 Bags ≈ ft³ ÷ 0.6 (80 lb bags)
Examples
Try a sample calculation
10×10 patio, 4 in thick
10 ft × 10 ft × 0.33 ft
Fast and focused
Works for slabs, footings, and pads.
Clear results
Includes step-by-step volume math.
Main features of Concrete Calculator:
Enter the required fields—dates, amounts, percentages, or measurements as labeled.
Double-check units (currency, tax rate, height/weight) match your scenario.
Run the calculation and read the breakdown, not just the headline number.
Adjust inputs to compare scenarios, or open a related Rankify calculator for the next step.