Gravel Calculator: Tons, Cubic Yards & Material Density Estimator
Use this gravel calculator to estimate aggregate quantities in cubic yards and tons for driveways, patios, French drains, and walkways. Features selectable material densities for pea gravel, crushed limestone, and road base.
Order 4 tons of bulk crushed aggregate delivered by dump truck (most quarry trucks hold up to 12-15 tons per load).
| Surface Coverage Area | 200 sq ft |
|---|---|
| Compacted Aggregate Depth | 4 inches |
| Compaction & Excavation Allowance | 10% |
| Total Volume Required | 73.3 cu ft (2.72 yd³) |
| Material Density Rating | 1.40 tons / cu yd |
| Total Aggregate Weight | 3.80 Tons (7,605 lbs) |
| 50 lb Bag Equivalent | 153 bags |
📐 Show Formula and Default Assumptions
We believe all home improvement estimates should be transparent and verifiable. Below is the exact math running in this browser tool:
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Gravel Volume Conversion:
Cubic Yards = (Area sq ft × Depth inches) ÷ 324Calculates uncompacted bulk cubic volume. -
Compaction Allowance:
True Volume = Volume × (1 + Compaction% / 100)Aggregates settle and pack down significantly when rolled or tamped with a plate compactor. -
Tons Weight Conversion:
Tons = True Cubic Yards × Material Density (tons/yd³)Quarries bill by the short ton (2,000 lbs). Density varies between 1.3 and 1.6 tons per yard.
Note: All default assumptions (waste %, coverage rates, container yields) can be adjusted directly in the input fields above to match your project specifications.
How to Measure Driveways and Paths for Crushed Stone
- Measure trench or driveway dimensions: For driveways, measure total length and average width. If width varies, take three cross-measurements and use the average.
- Determine excavating depth: Driveway base layers need 4 to 6 inches of crushed run (#road base). Surface walkways and decorative pea gravel paths typically need 2 to 3 inches.
- Add 10% to 15% compaction allowance: Mechanically compacting stone with a vibrating plate packer pushes angular pieces together, reducing volume by 10% to 15%.
- Always lay geotextile fabric first: Placing non-woven geotextile driveway fabric underneath prevents expensive gravel from sinking into soft subsoil mud over time.
- Check local quarry minimums: Bulk aggregate haulers deliver by tri-axle dump trucks holding 15 to 22 tons, or single-axle trucks holding 5 to 7 tons.
- Crown the driveway center for drainage: Never grade a gravel driveway or patio dead flat. Shape the centerline of the driveway with a 1/2-inch per foot crown sloping outward toward side drainage swales to shed stormwater immediately and prevent vehicle ruts and standing water potholes.
- Compact in successive 2-inch lifts: Aggregates will not achieve maximum density if compacted all at once at full 6-inch depth. Spread the stone in 2-inch to 3-inch layers, dampening lightly with water, and run a vibrating plate compactor over each individual lift until the stone locks solidly underfoot.
How the Gravel Calculation Works (Worked Example)
Suppose you are installing a 10 ft by 20 ft gravel patio (200 sq ft) with crushed stone (#57 limestone) at a 4-inch depth:
- 1. Net Surface Area: 10 × 20 = 200 sq ft.
- 2. Base Volume: 200 × 4 ÷ 324 = 2.47 cubic yards.
- 3. 10% Compaction Allowance: 2.47 × 1.10 = 2.72 cubic yards.
- 4. Density of #57 Crushed Stone: 1.4 tons per cubic yard.
- 5. Weight in Tons: 2.72 cu yds × 1.4 tons/yd = 3.81 tons (or 7,620 lbs).
- 6. What to Buy: Order 4.0 tons of crushed stone from your local landscape supply yard.
Common Landscape Aggregates & Typical Bulk Densities
| Material Type | Typical Size | Density (Tons / Cu Yd) | Best Applications |
|---|---|---|---|
| Pea Gravel | 3/8" Smooth Rounded | 1.35 Tons | Walkways, dog runs, decorative borders |
| #57 Crushed Limestone | 1/2" - 1" Clean Angular | 1.40 Tons | French drains, driveway surface, slab base |
| Crusher Run / Road Base | Fines to 1" Crushed | 1.60 Tons | Compacted foundation under pavers & driveways |
| Decomposed Granite (DG) | 1/4" Screened Fines | 1.50 Tons | High-traffic park trails, natural patios |
| River Rock / Oversized | 1" - 3" Smooth Stones | 1.30 Tons | Dry creek beds, bioswales, rain gardens |
Frequently Asked Questions About Gravel Calculator
How many tons of gravel are in a cubic yard?
On average, one cubic yard of typical crushed stone or gravel weighs roughly 1.4 tons (2,800 pounds). Heavy compacted crusher run with rock dust weighs closer to 1.6 tons per yard, while smooth pea gravel weighs approximately 1.35 tons per yard.
Why does gravel need a compaction allowance?
Loose crushed stone delivered in a truck contains up to 25% void air space between angular rocks. When spread, raked, and compacted with a heavy roller or tamper, the particles interlock, decreasing total layer thickness.
What is the best gravel size for a residential driveway?
#57 clean crushed limestone or granite (3/4" angular rock) is the industry benchmark. Angular edges lock together under vehicle tire weight without rolling out of the track like round river rock or pea gravel.
Can my pickup truck carry one ton of gravel?
A standard half-ton pickup (F-150, Silverado 1500) typically has a maximum bed payload of 1,500 to 2,000 lbs. One cubic yard of gravel weighs around 2,800 lbs, which will severely overload a standard half-ton suspension. Use a 3/4-ton truck or order delivery.
How deep should gravel be for a garden walkway?
A walkway needs 2 to 3 inches of gravel over a compacted soil and geotextile fabric base. Laying gravel deeper than 3 inches creates a "spongy" walking surface where feet sink uncomfortably.
Why is non-woven geotextile fabric superior to woven weed barrier under gravel?
Woven plastic weed fabric is designed for flower beds and tears easily under the sharp edges of heavy stone aggregate. Heavyweight 4 oz to 6 oz non-woven needle-punched geotextile fabric provides exceptional puncture resistance, stabilizes the subbase, and allows water drainage while permanently separating rock from mud.