Fence post concrete calculator
PROBags of concrete for fence post holes.
Short answer: Volume per hole = π × (d/2)² × depth. 50 lb bag ≈ 0.375 cu ft. 13 posts × 10" × 24" hole ≈ 14 cu ft = 38 × 50 lb bags. Enter your measurements above and the fence post concrete calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Cubic feet total
14.2
50 lb bags
38
80 lb bags
24
How does the fence post concrete calculator work?
Volume per hole = π × (d/2)² × depth. 50 lb bag ≈ 0.375 cu ft.
What does a worked example look like?
13 posts × 10" × 24" hole ≈ 14 cu ft = 38 × 50 lb bags.
What do people ask most?
›Diameter rule?
Post hole should be 3× the post width.
Which outdoor construction calculator should you use next?
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.
What should you read before you order materials?
Field notes from real jobs that explain the numbers behind this calculator.
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