How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches and click Calculate.
What it does – The Demolition Volume Calculator takes the three dimensions of a slab or wall and instantly returns the volume in cubic yards. Knowing the cubic‑yard amount is essential for accurate bidding, material ordering, and waste planning on demolition projects. The result is presented in a single number you can copy into estimates or purchase orders. Because the tool handles the conversion from inches to feet and the 27 ft³‑per‑yard factor for you, you avoid manual math errors and speed up the pre‑construction phase. The output is already in cubic yards, the standard unit for demolition haul‑away contractors, so you can directly compare it with vendor quotes. If you need a larger safety margin, simply add a percentage to the displayed figure. The calculator works on any device, no download required.
Pro tips
- Add 5‑10% extra volume for breakage and over‑break.
- Round up to the nearest 0.1 cubic yard for ordering.
- Verify thickness measurement at multiple points for uneven surfaces.
- Double‑check that thickness is entered in inches, not feet.
Real-life examples
- A demolition contractor estimating haul‑away fees for a concrete slab.
- A remodeler planning how much debris will fill a rented dumpster.
- A permit officer confirming the volume of material to be removed on a site.
Case study
John, a small‑business contractor, entered a 20 ft × 30 ft slab with 8 in thickness and instantly saw a volume of 14.8 cubic yards. He ordered exactly one 15‑yard dumpster, avoided a costly extra rental, and completed the job on budget.