How to use it
- Enter the length in feet.
- Enter the width in feet.
- Enter the depth in inches.
- Click calculate to see cubic yards.
Our free Concrete Volume Calculator turns three simple measurements—length (ft), width (ft) and depth (in)—into the exact amount of concrete you need in cubic yards. Knowing the yardage up front prevents costly over‑orders and avoids shortfalls that delay a project. The tool first converts depth from inches to feet, multiplies the three dimensions to get cubic feet, then divides by 27 to show cubic yards, the standard unit for concrete delivery. For example, a 10 ft × 12 ft slab 6 in deep yields 2.22 yd³. Read the result as the total yardage to order; round up slightly to cover minor variations. You can reuse the calculator for multiple pours by resetting the fields, and it works on any device. Accurate yardage helps you compare quotes and schedule deliveries confidently.
Pro tips
- Add 5‑10% extra for waste and spillage
- Round up to the nearest 0.25 yd for easier ordering
- Check local supplier minimums before finalizing the order
- Verify depth conversion; 12 in = 1 ft
Real-life examples
- A contractor estimating concrete for a new driveway
- A homeowner planning a patio slab and wants to avoid over‑ordering
- A landscape crew calculating material for a retaining wall base
Case study
Mike, a DIY homeowner, entered his 12 ft × 15 ft patio dimensions with a 4 in depth. The calculator gave 2.96 yd³; he ordered 3 yd³, saved $150 on excess concrete, and completed the pour on schedule.