How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Read the pounds, tons, and cubic‑yard results.
What it does – The tool turns the three dimensions of any slab into three practical outputs: total weight in pounds, weight in tons, and volume in cubic yards. Why it matters – Knowing the exact weight helps you order the right amount of mix, avoid over‑paying, and ensure your crew can handle the load safely. How to read it – Weight (lb) is the raw mass of the concrete, Weight (tons) divides that number by 2,000 for easier truck‑load planning, and Cubic yards converts the cubic‑feet volume (ft³ ÷ 27) to the standard ordering unit. The calculator uses the standard 80‑lb bag yielding 0.6 ft³, so results reflect real‑world mix ratios without guesswork.
Pro tips
- Add 5‑10% extra for waste and spillage.
- Round up to the nearest full bag when ordering material.
- Convert the cubic‑yard figure to the number of 80‑lb bags (1 bag ≈ 0.6 ft³).
- Double‑check thickness conversion: inches ÷ 12 = feet.
Real-life examples
- A homeowner estimating concrete for a new patio slab.
- A contractor sizing a driveway pour to request the correct truck load.
- A DIY gardener planning a raised garden bed foundation.
Case study
Sam entered a 12 ft × 8 ft × 4 in slab and instantly saw 5,333 lb (2.67 tons) and 1.78 cubic yards, letting him order exactly 15 bags and avoid a costly over‑order.