How much gravel do I need for a patio?

A 20 by 20 foot patio at 3 inches deep typically requires about 3.7 cubic yards or around 5.2 tons of gravel depending on material density.

What gravel is best for landscaping?

Pea gravel and river rock are best for decorative use, while crushed stone is better for structural bases like patios and walkways.

How deep should landscaping gravel be?

Most landscaping projects use 2 to 4 inches of gravel depending on whether it is decorative or structural.

Gravel Landscaping Guide: How Much Gravel for Patios, Walkways & Decorative Stone

Why Gravel Is One of the Best Landscaping Materials

Gravel is one of the most versatile materials you can use in landscaping. It’s affordable, easy to install, drains well, and works for everything from patios to pathways to decorative garden features.

But here’s the catch: most landscaping gravel projects fail because of poor planning—not bad material. People underestimate how much gravel they need, use the wrong type, or skip base preparation entirely.

That’s how you end up with sinking patios, uneven walkways, and weeds pushing through within a season.

This guide breaks down how to calculate gravel correctly, choose the right type, and build landscaping features that actually last.

How Much Gravel Do You Need for Landscaping Projects?

Gravel estimation always comes down to:

Length
Width
Depth

Example patio:

20 ft × 20 ft
3 inches deep

Results:

~3.7 cubic yards
~5.2 tons

For exact numbers, use the gravel calculator.

Quick Landscaping Gravel Estimates

Project	Size	Depth	Cubic Yards	Tons
Patio	20 × 20 ft	3"	3.7	5.2
Walkway	50 × 3 ft	2"	0.9	1.3
Decorative Area	30 × 10 ft	2"	1.85	2.6

Best Gravel Types for Landscaping

Pea Gravel

Smooth, rounded stones ideal for decorative areas, patios, and walkways. Comfortable underfoot but not structurally strong.

River Rock

Larger and more decorative. Great for garden beds and borders, but not for load-bearing surfaces.

Crushed Stone

Angular and compactable—best for patio bases and areas requiring stability.

Material	Best Use
Pea Gravel	Decorative areas, walkways
River Rock	Garden beds, drainage accents
Crushed Stone	Patio base, structural support

Gravel Depth Guidelines

Project	Recommended Depth
Decorative areas	2 inches
Walkways	2–3 inches
Patio base	3–4 inches

Too shallow and weeds break through. Too deep and you’re wasting material.

Why Patio Bases Matter More Than You Think

A lot of people treat gravel patios like decorative projects. They’re not.

Without a proper base:

Pavers sink
Surfaces become uneven
Water pools underneath

A proper patio setup includes:

Compacted subgrade
Crushed stone base
Leveling layer

Cost Breakdown for Landscaping Gravel

Typical gravel pricing:

$30–$75 per ton
$50–$150 delivery

Example patio:

5 tons × $60 = $300
Delivery = $100
Total = ~$400

Add pavers or edging and total costs rise quickly.

Common Landscaping Mistakes

Using decorative gravel as a base
Skipping edging (gravel spreads over time)
Not compacting the base
No weed barrier
Incorrect depth

Pro Tips for Better Results

Use edging to contain gravel
Install landscape fabric to reduce weeds
Compact base layers before adding top gravel
Choose material based on function—not looks
Order 5–10% extra

Frequently Asked Questions

Can I use pea gravel for a patio?
Yes, but only as a top layer. It should not be the base.

How do I keep gravel from spreading?
Use edging materials like metal, plastic, or stone borders.

Do I need landscape fabric?
It’s strongly recommended to prevent weeds and improve stability.

Final Takeaway

Gravel landscaping projects look simple—but the difference between a clean, long-lasting install and a messy, uneven one comes down to planning.

Choose the right material
Use proper depth
Prepare the base
Contain the edges

For accurate estimates, use the gravel calculator.

Related guides: Driveway Guide | Calculation Guide | Drainage Guide