Concrete for a 4×4 Fence Post — Bags Per Post
A standard 4×4 fence post requires a hole approximately 10 inches in diameter and 30 inches deep. This yields about 1.36 cubic feet of concrete per post. With waste factor, you need about 1.5 cubic feet — roughly 3-4 bags of 60lb mix or 2-3 bags of 80lb mix per post.
Quick Answer
Project Type
cylindrical post hole
Quantity
1
Includes Waste
10% factor
Use the full calculator below for custom dimensions, multiple zones, cost estimates, and to adjust the waste factor.
Concrete Calculator
Select your project type, enter dimensions, and get instant results with bag counts, weight, and cost.
Zone 1
Results
Total Volume
0.00 cu ft
0.00 cu yd
60 lb Bags
0
80 lb Bags
0
Total Weight
0 lbs
(0.00 tons)
💡 Ready-Mix Recommended
At 1+ cubic yard, truck delivery ($125–$175/yd) is usually cheaper and easier than mixing bags by hand.
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| freeconcretecalc.com · CALCULATION RECEIPT |
| Zone | Type | Dimensions | Qty | Volume (cu ft) |
|---|
Total Volume — | Cubic Yards — | Total Weight — |
60 lb Bags — | 80 lb Bags — | Est. Cost — |