Planning guide
What is gravel?
Gravel is graded natural or crushed stone used for drainage, decorative cover, driveways, and structural base courses. Angular crushed products lock together; rounded gravel moves more freely.
How this calculation works
The calculator finds the rectangular volume at the installed depth, then estimates weight using a typical bulk density. Supplier gradation and moisture can change actual tonnage.
Common measurement mistakes
- Selecting rounded stone for a load-bearing base
- Skipping compaction allowance
- Measuring depth before removing soft soil
Professional tips
- Use geotextile where separation from soil is needed
- Compact base gravel in layers
- Confirm truck access before scheduling delivery
Gravel Calculator FAQs
How much extra gravel should I buy?
A 10% allowance is a practical starting point for settling, spillage, uneven grade, and measurement error. Complex shapes may justify a little more.
Should I measure before or after edging?
Measure the finished inside dimensions of the area. Permanent edging occupies space and should not be included in the material footprint.
What depth should I use?
Paths commonly use 2–3 inches (5–8 cm) of finish gravel over a base. Driveway base depth depends on soil and loads and may require professional design.