Posts & Foundation
Concrete, gravel and digging depth for a fence that stays put.
Pick the calculator that matches your job. All calculators
- Fence post calculator Calculate line posts, corner posts and end posts from run length and spacing, with concrete for each post included in the take-off.
- Fence post concrete calculator Work out how many bags of concrete mix each fence post footer needs, accounting for the post itself, based on hole and post dimensions.
- Fence post depth calculator Get the right embedment depth for a fence post from frost line and above-ground height, so corner posts hold and winter frost cannot heave them.
- Concrete bags calculator Turn hole diameter, depth and the number of holes into a bag count for 50, 60 and 80 pound mixes, with the volume math shown.
- Gravel calculator Compute gravel volume in cubic feet and yards, then tons by material type, for driveways, pad work and fence post bases.
- Retaining wall calculator Work out blocks per course, courses and total blocks for a retaining wall from wall dimensions and block size, including the buried base course.
- Fence Post Spacing Calculator Calculate exact on-center post spacing and section divisions to prevent short awkward end panels on any fence length.
- Fence Post Length Calculator Find total post length based on fence height, local frost line depth, and drainage gravel base with recommended lumber sizes.
- Fence Post Hole Calculator Calculate post hole diameter, depth, cylinder volume, and 60 lb or 80 lb concrete bags needed for sturdy fence footings.