Gravel Depth Calculator
Calculate gravel depth thickness and volume — for slabs, base and coverage with waste. Enter gravel dimensions to get instant results. Enter dimensions, select units and add waste to get instant, supplier-ready numbers.
Enter dimensions above to calculate
- Enter values to see step-by-step substitution.
Engineering Assumptions:
- This calculates coverage depth from an available volume. It does not choose a structurally adequate slab or pavement thickness.
- Volume and area must refer to the same placed or compacted condition.
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TOP VIEW — Length × Width
SECTION — Volume 3yd3
What Is This Calculator?
The Gravel Depth Calculator — Sizes gravel and aggregate for driveways and patios — volume, weight and cost with density.
What Does It Calculate?
- Cubic yards and cubic feet
- Tons and pounds using 1.35–1.60 t/yd³
How to Use the Calculator
- Measure Area 200 ft2, 2.47 yd3 ordered — use feet for length/width and inches for thickness where typical.
- Enter values and select units. The calculator converts to feet before calculating (inches /12, yards x3).
- Adjust waste % and optional price, then click Calculate. Results show with waste included.
- Use Reset to clear and try another size.
Formula & Engineering Methodology
Average depth = volume / (length × width).
- Volume — Cubic yards *27
- Area — Length * Width ft2
All units convert to exact standard engineering dimensions (NIST SP 811) before calculation to ensure consistency between US Customary and Metric measurements.
Worked Example
Example: Area 200 ft2, 2.47 yd3 ordered
| STEP | VALUE |
|---|---|
| Volume ft3 | 2.47*27 = 66.69 ft3 |
| Depth | 66.69/200 = 0.333 ft = 4.0 in |
Construction Information
Material: Pea gravel 1.35 t/yd³, crushed stone 1.40, river rock 1.33, limestone 1.60, sand 1.30. Confirm with scale ticket — moisture adds 10%.
Depth check — add compaction 1.10x for open-graded, 1.20x for crusher run.
Material Information
Pea gravel 1.35 t/yd³, crushed stone 1.40, river rock 1.33, limestone 1.60, sand 1.30. Confirm with scale ticket — moisture adds 10%.
Waste & Overages
Open-graded stone settles ~8% (×1.10), crusher run compacts 15–25% (×1.20). Add after volume.
Practical Tips
- Use fabric under decorative gravel
- Crown driveway center 2% for drainage
Common Mistakes
- Mixing tons and yards without density
- Not adding compaction for crusher run
Assumptions & Engineering References
- This calculates coverage depth from an available volume. It does not choose a structurally adequate slab or pavement thickness.
- Volume and area must refer to the same placed or compacted condition.
This calculator provides an estimate based on your inputs. Actual requirements vary by site, material and installation. For code-regulated or load-bearing work, consult a qualified professional.
Calculations run 100% in your browser — zero tracking of your dimensions or input data.
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Frequently asked questions
What does the Gravel Depth Calculator calculate?
The Gravel Depth Calculator estimates gravel depth quantity for US jobs — Cubic yards and cubic feet, Tons and pounds using 1.35–1.60 t/yd³, Cost per ton or per yard with waste. Enter dimensions, choose units, add waste and price to get instant results.
How do I measure for gravel depth?
Measure area 200 ft2, 2.47 yd3 ordered on site. Use the unit selectors — the tool converts inches→feet (÷12) and yards→feet (×3) before math. For non-rectangular, split into rectangles and add.
How much waste should I add?
Open-graded stone settles ~8% (×1.10), crusher run compacts 15–25% (×1.20). Add after volume.
How accurate is this gravel depth estimate?
Math is exact for your inputs. Actual needs vary by site, material and installation. Add 5–10% waste for rectangular, 10–15% for irregular.
About Calculator Street
Built by Vipul Otari for US homeowners & contractors. Calculator inputs are processed in your browser. Estimates depend on your measurements, product specifications and the assumptions shown on this page. Confirm order quantities with your supplier and structural requirements with your project designer. Page updated: 2026-09-11.