How to use it
- Enter length, width, and thickness.
- Enter price per cubic yard.
- Click Calculate.
- Read cubic yards, bags, and total cost.
What it does – The Concrete Demolition Cost Calculator converts the dimensions of the area you need to tear out into cubic yards, then tells you how many 80‑lb bags of mix you’d need to fill that space and the total price at your supplied rate.
Why it matters – Knowing the exact volume prevents over‑ordering, saves money, and helps you schedule labor and disposal.
How to read the results – Cubic yards is the demolition volume in standard units. Multiply by your price per cubic yard to see the Estimated cost. Cubic feet is the raw volume before conversion; divide by 0.6 ft³ per bag to get the Bags count, rounded up to the nearest whole bag.
Use the numbers to compare suppliers, plan waste disposal, and keep your project on budget.
Pro tips
- Add a 10% waste allowance to the cubic‑yard total.
- Always round the bag count up to the next whole bag.
- Confirm the price per cubic yard includes delivery or handling fees.
- Measure thickness in inches, then convert to feet before entering.
Real-life examples
- Homeowner planning to remove a 10‑ft by 12‑ft slab for a new patio.
- Contractor estimating demolition for a commercial parking pad.
- DIY enthusiast figuring material needs for a backyard fire pit removal.
Case study
Mike needed to tear out a 15 ft × 20 ft driveway that was 4 in thick. Using the calculator, he saw the job required 1.78 cubic yards, 94 bags of mix, and a $1,200 estimate. He ordered exactly that amount, avoided a $300 over‑order, and completed the demolition on budget.