Miscellaneous Concrete Calculators
Explore our suite of free miscellaneous concrete calculators to precisely estimate volume, weight, and costs for your next project. Select a tool below to get started.
Post Hole Concrete Calculator
Estimate concrete, gravel, and bag counts for fence posts, gate posts, deck posts, and more.
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Crushed Concrete Estimator Calculator
Calculate crushed concrete volume, tons, coverage, and total cost with compaction adjustments.
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Post Holes, Crushed Concrete, and More
Smaller and specialized projects still require precise material calculations. Setting fence posts correctly using dry-pour methods or bulk mixing ensures fences hold against wind shear. Additionally, using recycled crushed concrete as a base requires accurate tonnage conversions depending on compaction rates.
Core Formula
Post Hole Volume = (π × r² × Depth) - Post Volume.
Frequently Asked Questions
- How deep should fence post holes be?
- Post holes should generally be dug to a depth of 1/3 to 1/2 of the above-ground post height, and extending below the local frost line to prevent ground heaving.
- Should I pour dry concrete in the post hole?
- You can pour fast-setting concrete mix dry into the hole around the post, then soak it with water. It cures rapidly and is perfectly fine for residential fencing.
- What is crushed concrete used for?
- Crushed recycled concrete is a highly sustainable, cost-effective substitute for crushed gravel. It acts as an excellent compacting sub-base for driveways, roads, and large parking slabs.
- Will crushed concrete leach chemicals?
- While completely safe for standard sub-bases, crushed concrete has a high alkalinity. It should not be used as decorative mulch directly adjacent to sensitive plants or acidic soil gardens.