How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- View cubic yards, bags, and cubic feet instantly.
What it does – The Concrete Post Calculator turns the dimensions of your post footing into three practical measures: total cubic yards, total cubic feet, and the number of 80‑lb bags of mix you’ll need. Knowing the exact volume helps you order the right amount, avoid costly over‑orders, and keep the job on schedule. The tool first converts the entered length, width, and thickness into cubic feet, then divides by 27 to get cubic yards, and finally divides cubic feet by 0.6 (the yield of one 80‑lb bag) to show how many bags to purchase. The results appear instantly, so you can compare prices, adjust dimensions, or add a waste factor before you call the supplier. Use the numbers as a solid baseline for budgeting and ordering.
Pro tips
- Add 10% extra for spillage and compaction.
- Round up bag count to the next whole bag.
- Order bags in multiples of 5 for better pricing.
- Double‑check thickness; a 2‑in post footing differs greatly from 6‑in.
Real-life examples
- A homeowner building a 4‑ft tall fence post needs to know how many bags of concrete to buy.
- A contractor pouring a series of deck footings wants quick volume estimates for each opening.
- A landscaper installing a garden edging post wants to budget material costs accurately.
Case study
Mike needed to pour three 12‑in square footings 24 in deep for a new deck. Using the calculator, he saw the job required 1.8 cubic yards, 48 bags of mix, and ordered exactly that amount, saving $120 on excess material.