Home/Calculators
All Gravel Calculators
Every calculator on the site uses the same volume math and density data — they just come pre-configured for a specific use case so you don't have to set up the inputs yourself. If your project doesn't match any of these, the flagship calculator handles any shape and material.
Driveways, paths & paving
Surfaces that take traffic. Compacted bases, top courses, and bedding layers.
Decorative & landscape
Beds, paths, fire pits, and decorative features. Pick the gravel for the look.
Drainage & structural
Where gravel does engineering work — drainage, backfill, and water management.
By material & spec
Pick the calculator by what your supplier sells.
By specific size or grade
Locked-density calculators for common product names — "#57 stone," "3/4 gravel," crusher run, river rock, limestone, and 21AA.
#57 Stone Calculator
Locked to #57 (¾" angular) — the most-stocked U.S. driveway and drainage stone.
3/4" Gravel Calculator
Clean ¾", crushed ¾", and ¾" minus — the three flavors of "3/4" gravel".
21AA Gravel Calculator
Dense-grade base course (a.k.a. CA6, Class 5, Crusher Run, MOT Type 1).
Crusher Run Calculator
Workhorse driveway base — dust to ¾", compacts hard.
Limestone Calculator
All limestone size grades — #57, #8, #4, 2B, CA6, screenings.
River Rock Calculator
1"-3" smooth rounded stone for decorative beds and dry creeks.
Cost & units
Budgeting and metric conversions.
Frequently asked questions
Still not sure which to use?
The homepage calculator handles every shape and every material in our library — these niche pages just save you a few clicks. Or read the guides for help picking the right depth, material, and quantity.