Gravel Calculator
Estimate cubic yards, tons, and bags for driveways, pathways & base material
๐ Area Shape
๐ Depth
๐ชจ Gravel Type
๐ Gravel Estimate
โ
โ ๏ธ Disclaimer: Always consult a structural engineer for load-bearing elements. This tool provides estimates only. Gravel weights vary by moisture and composition โ confirm with your supplier.
๐ How to Use This Gravel Calculator (Step-by-Step)
Follow these steps to get an accurate gravel estimate for your project:
- Select area shape โ Rectangle, Circle, or Irregular area.
- Enter dimensions โ Length and width for rectangles, diameter for circles, or total square feet for irregular shapes.
- Enter desired depth โ 2-4 inches for pathways, 4-6 inches for driveways, 6-12 inches for base material.
- Select gravel type โ Different gravels have different weights per cubic yard.
- Toggle compaction factor โ Add 15% for base material that will be compacted.
- Click calculate โ Get cubic yards, tons, and bag estimates.
Pro tip: Always order 10-15% extra for irregular areas, spillage, and future top-ups. Gravel settles and compacts over time.
๐ชจ Gravel Type Reference
| Gravel Type | Weight (lbs/cu yd) | Tons per cu yd | Best Used For |
|---|---|---|---|
| Pea Gravel | 1,400 | 0.7 tons | Pathways, drainage, playgrounds, decorative |
| Crushed Stone / Base | 2,700 | 1.35 tons | Driveways, base material, foundations |
| River Rock | 2,800 | 1.4 tons | Landscaping, drainage, decorative |
| Decomposed Granite | 2,600 | 1.3 tons | Paths, patios, compacted surfaces |
Note: A standard pickup truck holds approximately 2-3 cubic yards. A dump truck holds 10-15 cubic yards.
๐๏ธ Real-World Gravel Examples
Example 1: Driveway (40′ x 20′, 4 inches deep) – Crushed Stone
Area: 800 sq ft | Volume: 800 ร (4รท12) = 267 cu ft รท 27 = 9.9 cu yd
With compaction (15%): 11.4 cu yd | Tons: 11.4 ร 1.35 = 15.4 tons
Area: 800 sq ft | Volume: 800 ร (4รท12) = 267 cu ft รท 27 = 9.9 cu yd
With compaction (15%): 11.4 cu yd | Tons: 11.4 ร 1.35 = 15.4 tons
Example 2: Circular Patio (15′ diameter, 2 inches deep) – Pea Gravel
Area: ฯ ร (7.5)ยฒ = 177 sq ft | Volume: 177 ร (2รท12) = 29.5 cu ft รท 27 = 1.09 cu yd
Bags needed (0.5 cu ft bag): 59 bags
Area: ฯ ร (7.5)ยฒ = 177 sq ft | Volume: 177 ร (2รท12) = 29.5 cu ft รท 27 = 1.09 cu yd
Bags needed (0.5 cu ft bag): 59 bags
Example 3: Pathway (100′ x 3′, 3 inches deep) – Decomposed Granite
Area: 300 sq ft | Volume: 300 ร (3รท12) = 75 cu ft รท 27 = 2.78 cu yd
With compaction: 3.2 cu yd | Tons: 3.2 ร 1.3 = 4.2 tons
Area: 300 sq ft | Volume: 300 ร (3รท12) = 75 cu ft รท 27 = 2.78 cu yd
With compaction: 3.2 cu yd | Tons: 3.2 ร 1.3 = 4.2 tons
Example 4: French Drain Trench (50′ x 1.5′, 12 inches deep) – Pea Gravel
Area: 75 sq ft | Volume: 75 ร (12รท12) = 75 cu ft รท 27 = 2.78 cu yd
Tons: 2.78 ร 0.7 = 1.9 tons
Area: 75 sq ft | Volume: 75 ร (12รท12) = 75 cu ft รท 27 = 2.78 cu yd
Tons: 2.78 ร 0.7 = 1.9 tons
โ Frequently Asked Questions
How much gravel do I need for a driveway?
For a standard 2-car driveway (20′ x 40′) at 4 inches deep: 800 sq ft ร 0.333 ft = 266 cu ft รท 27 = 9.9 cubic yards. Add 15% for compaction = 11.4 cubic yards (about 15.4 tons of crushed stone).
How many square feet does a ton of gravel cover?
One ton of gravel covers approximately 100 sq ft at 2 inches deep, 70 sq ft at 3 inches deep, or 50 sq ft at 4 inches deep. Coverage varies by gravel type and density.
How much does a cubic yard of gravel weigh?
Pea gravel: ~1,400 lbs (0.7 tons). Crushed stone: ~2,700 lbs (1.35 tons). River rock: ~2,800 lbs (1.4 tons). Decomposed granite: ~2,600 lbs (1.3 tons).
How much gravel can a pickup truck hold?
A standard 1/2 ton pickup can safely hold 2-3 cubic yards (about 3-4 tons) of gravel. Full-size 3/4 ton trucks can hold 3-4 cubic yards. Always check your truck’s payload capacity.
Do I need a base layer under gravel?
For driveways and high-traffic areas: yes. Use 4-6 inches of crushed stone base, then 2-3 inches of decorative gravel on top. For pathways, 2-3 inches of gravel alone is usually sufficient.
How much does gravel delivery cost?
$50-150 per load for delivery, depending on distance and quantity. Some suppliers offer free delivery for 10+ cubic yards. Short loads under 5 yards may have additional fees.
