How to measure
Measure the finished path or drive area and the compacted stone depth. Split tapers and irregular zones into simple sections. Ask whether the supplier's quoted density represents loose delivery or compacted placement.
Landscape calculator
Gravel Calculator
Estimate gravel volume and weight for paths, driveways, and drainage. Switch between US customary and metric units, adjust the assumptions, and keep every step visible.
ReviewedNovember 2, 2026
ScopeFormula, defaults & sources
Report an issue ↗The calculation
A visible formula, not a black box.
Volume & weight · Mathematical derivationweight = area × compacted depth × waste factor × material density
Inputs are converted to a common base unit before calculation. Purchase quantities are rounded only at the final buying boundary.
Example inputDefaultStatus
Area length30 ftReplace with measurement
Area width10 ftReplace with measurement
Compacted depth4 inPlanning default — verify
Material density100 lb/ft³Planning default — verify
Waste allowance10 %Planning default — verify
Worked example
Example: a 30 × 10 ft path
At 4 in compacted depth, 100 lb/ft³, and 10% allowance, the sample is about 5.5 US tons; replace density with the supplier's value.
Use this to understand the workflow—not as a recommendation for your project.Sources & scope
What supports this calculation.
Common mistakes
Check the job, not just the number.
- 01Leaving the example gravel inputs unchanged instead of entering measured project values.
- 02Treating an editable coverage, size, density, or allowance as universal instead of checking the selected product label, project documents, and local requirements.
- 03Ordering from the rounded result without reviewing exclusions: Gravel density varies with stone type, grading, moisture, and compaction. Use the supplier’s bulk density when available.
Questions, answered
Gravel FAQ
What does the Gravel Calculator estimate?
Estimate gravel volume and weight for paths, driveways, and drainage. The primary output is volume & weight, with the intermediate assumptions kept visible.
How is the gravel result calculated?
The visible formula is: weight = area × compacted depth × waste factor × material density. Inputs are converted to a common base unit before the final purchase boundary is rounded.
Are the default values recommendations?
No. Dimensions are worked examples and product-dependent presets are planning defaults. Replace them with the selected product label, project documents, and local requirements.
Is the result ready to order from?
Use it as a checked planning estimate, then confirm packaging, minimum orders, installation instructions, site conditions, and any code or professional-design requirements.
Project notes
Measure, adjust, and verify.
Details specific to gravel planning.
What the result includes
The calculator finds adjusted volume, multiplies it by the editable bulk density, and reports purchase weight in US tons or metric tonnes with the volume shown for checking.
When to adjust allowance
Change density to the supplier's figure for the exact stone and grading. Allow separately for subgrade loss, compaction, edge spill, rut correction, and delivery increments.
Limitations
Base-course design, geotextile, drainage, excavation, compaction equipment, axle access, and load capacity are outside this quantity estimate. Moisture and grading can materially change bulk density.