How to use it
- Enter length, width and thickness.
- Click Calculate.
- Read cubic yards, cubic feet, and bag count.
What it does – The Figuring Concrete Footings Calculator takes the length, width and thickness of a footing and instantly tells you the total volume in cubic yards, the equivalent cubic feet, and how many 80‑lb bags of mix you’ll need. Knowing the exact volume prevents over‑ordering, saves money, and keeps your project on schedule. Why it matters – Concrete is heavy and pricey; ordering too little means costly trips to the supplier, ordering too much adds unnecessary weight and waste. How to read the results – Cubic yards is the standard unit for delivery quotes, cubic feet helps you visualize the space, and the bag count tells you the exact number of mixes to purchase. You can also compare different footing sizes side‑by‑side, adjust for a 10% waste factor, and instantly see how the bag count changes. The tool works on any device, so you can plan on the job site or at the office.
Pro tips
- Add 10% extra for waste.
- Round up bag count to the next whole bag.
- Order bags in multiples of 10 for easier delivery.
- Double‑check thickness units; convert inches to feet if needed.
Real-life examples
- A homeowner planning a new deck foundation.
- A contractor estimating material for a small commercial slab.
- A DIY gardener building raised beds with concrete footings.
Case study
Mike needed footings for a 12 ft × 8 ft deck. Using the calculator he saw he required 0.74 cubic yards, 1,260 cubic feet, and 2,100 bags. He ordered exactly that amount, avoided a $150 over‑order, and completed the pour on schedule.