Free · Everyday · Construction

Concrete Calculator

Estimate concrete volume for a rectangular slab and add a waste allowance, with cubic-yard and bag totals.

  • Checked formula
  • Private in your browser
  • No signup
Calculator inputs

Enter your values

Result

Your calculation

Concrete to order
2.72 yd³
Includes waste allowance
Volume
73.33 ft³
80 lb bags
123 bags
60 lb bags
163 bags

How to use this calculator

  1. Enter the values and choose the units that match your situation.
  2. Calculate to see the primary answer and useful conversions.
  3. Review the assumptions before using the result for a project or decision.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.