How Much Pea Gravel for a Patio?
A loose-gravel patio is really two projects: a compacted crushed-stone base and a thin pea gravel top. This guide sizes both, with settlement overage and bag-vs-bulk math.
By the Cubic Yard Calculator team · Last updated October 2026
Not pavers — the loose-gravel distinction
Everything here is for loose pea gravel patios: stone poured over a compacted base, raked flat, and held in by edging. The quantities, depths, and base spec are completely different from a paver patio, where the surface locks together and the bedding is a thin screeded layer of concrete sand. If you're building with pavers, our paver base sand and gravel guide has the right math for that project — what follows applies only to loose gravel.
The short answer
A loose-gravel patio has two layers: a 4-inch compacted base of crusher run and a 2 to 2.5-inch loose top of pea gravel — never deeper than 2.5 inches, or furniture sinks and wobbles. For the classic 12×14-foot patio (168 sq ft), that's about 2.07 cubic yards of crushed base plus 1.3 cubic yards of pea gravel. Order about 2.5 yards of base and 1.75 yards of pea gravel to cover compaction and the 15–25% settlement the loose layer loses as it beds in.
The two layers, and why you need both
Layer 1 — the crushed base (4 inches, compacted). Dense-grade crusher run or “road base” — crushed stone with fines that packs into a near-concrete slab under a plate compactor. This is what keeps the patio from turning into a muddy, sunken mess. It also carries the slope that drains water off the patio: grade the base to fall 1 inch per 8 feet away from the house.
Layer 2 — the pea gravel top (2–2.5 inches, loose). Rounded ⅜-inch pea gravel, poured on and raked level. The roundedness is a feature here — smooth, comfortable to walk on and rake back into place. Do not compact the top layer, and do not exceed 2.5 inches: deeper loose stone behaves like a beach, swallowing chair legs and feeling unstable underfoot.
Under everything: landscape fabric on the bare soil before the base goes down. It separates the stone from the soil so the base doesn't sink and weeds don't migrate up. Our landscape fabric under rock guide covers fabric types — a spunbond or woven contractor-grade fabric is right for this job; thin big-box weed barrier tears under a compactor.
The math: one formula, two depths
Cubic yards = length × width × (depth in feet) ÷ 27. Run it twice — once at 4 inches (⅓ foot) for the base, once at 2.5 inches (0.2083 feet) for the loose top:
Base: area in sq ft × (4 ÷ 12) ÷ 27
Loose top: area in sq ft × (2.5 ÷ 12) ÷ 27
The 12×14 worked example: base = 168 × 0.3333 ÷ 27 = 56 ÷ 27 = 2.07 cubic yards; loose top = 168 × 0.2083 ÷ 27 = 35 ÷ 27 = 1.30 cubic yards. Add overage and round to what the yard sells — bulk is sold by the full or half yard.
Crushed base table (4 inches, compacted)
Base volume is the compacted target; the “order” column adds 10% for compaction loss (4 inches of loose stone tamps down to less) and rounds to half yards. Tons use the gravel factor of 1.4 tons per yard:
| Patio (L×W) | Area | Base 4″ (yd³) | Order (+10%) | Base tons |
|---|---|---|---|---|
| 10 × 10 ft | 100 sq ft | 1.23 | 1.5 yd | 2.1 |
| 10 × 12 ft | 120 sq ft | 1.48 | 1.5 yd | 2.1 |
| 12 × 14 ft | 168 sq ft | 2.07 | 2.5 yd | 3.5 |
| 12 × 16 ft | 192 sq ft | 2.37 | 2.5 yd | 3.5 |
| 14 × 16 ft | 224 sq ft | 2.77 | 3.0 yd | 4.2 |
| 16 × 20 ft | 320 sq ft | 3.95 | 4.5 yd | 6.3 |
Pea gravel top table (2.5 inches, loose)
Loose pea gravel settles 15–25% in the first year as it beds into the base and foot traffic shakes it down — that's normal, not an error in your math. The “order” column builds in a 20% settlement buffer on top of the loose depth, rounded to half yards:
| Patio (L×W) | Loose 2.5″ (yd³) | Order (+20%) | Top tons | ≈ 0.5-ft³ bags |
|---|---|---|---|---|
| 10 × 10 ft | 0.77 | 1.0 yd | 1.4 | 54 |
| 10 × 12 ft | 0.93 | 1.25 yd | 1.75 | 68 |
| 12 × 14 ft | 1.30 | 1.75 yd | 2.45 | 95 |
| 12 × 16 ft | 1.48 | 2.0 yd | 2.8 | 108 |
| 14 × 16 ft | 1.73 | 2.25 yd | 3.15 | 122 |
| 16 × 20 ft | 2.47 | 3.0 yd | 4.2 | 162 |
For a patio size not listed, our gravel calculator handles either layer — set the depth to 4 inches for the base or 2.5 inches for the top.
When bags beat bulk
Big-box pea gravel comes in 0.5-cubic-foot bags, so bags per yard = 27 ÷ 0.5 = 54. The crossover is pure price math: bulk pea gravel runs roughly $60–$90 per cubic yard plus a $50–$100 delivery fee, while a bag at $5.50 implies 54 × $5.50 ≈ $300 per yard-equivalent. Bags almost never win once you need a full yard — the bulk price is a quarter of the bagged price, and the delivery fee is spread across the whole load.
The exception: tiny top-ups or the 10×10-and-under patios where you need under half a yard and would otherwise pay a $75 delivery fee to dump a half yard of stone. And bags win on logistics — if your yard has no dump-truck access, hauling 50+ bags yourself may beat paying a stone-slinger surcharge. Rule of thumb: under ~0.75 yards, price both; at a yard or more, bulk wins essentially every time.
Edging is not optional
A loose-gravel patio without edging is a temporary gravel pile. Install a rigid edge before the base goes down: steel or aluminum paver edging (the longest-lasting, cleanest look), or heavy-duty plastic landscape edging pinned with 8–10 inch landscape spikes every 12–16 inches. Set the top of the edging flush with, or ¼ inch below, the finished gravel surface — high enough to hold the stone in, low enough to mow over and walk across. The classic failure is edging that's too short or pinned into the base instead of the soil: it heaves, leans, and the gravel migrates out within a season.
Stone size and color options
Size: ⅜-inch pea gravel is the patio standard — smooth, comfortable underfoot, and fine enough to rake level easily. Larger ¾-inch pea gravel reads bolder but rolls underfoot and is harder to keep level for furniture. Crushed stone as a top layer packs firmer but looks harsher; for the full comparison see our crushed stone vs pea gravel guide and our decomposed granite vs gravel guide if you're weighing alternatives to pea gravel entirely.
Color: natural tan/cream pea gravel is cheapest and most available; rainbow/pebble mix adds contrast for a modest upcharge; white marble chip is the premium look — bright and crisp, but typically 1.5–2× the price and it shows leaves and dirt more. Color doesn't change the quantity math, but lighter stone gets noticeably hotter underfoot in summer — worth knowing if the patio is a barefoot zone.
Installation sequence that actually works
1. Mark the outline, strip sod and topsoil 6 inches deep (base + top + edging depth). 2. Grade the soil for the 1-in-8-feet slope away from the house. 3. Lay landscape fabric, overlapping seams 6 inches. 4. Pin the edging at finished height. 5. Place the crusher run in 2-inch lifts, compacting each lift with a plate compactor (rent one — hand tamping a whole patio is miserable and uneven). 6. Spread the pea gravel, rake level, and resist the urge to compact it. 7. Hose the top lightly to settle it into the base and wash off dust.
For the base layer itself, our gravel calculator gives quick volumes for the crusher run; if you're also considering decorative rock elsewhere in the yard, the landscape rock calculator handles the heavier stone classes.
Common mistakes
Skipping the base. Pea gravel straight on dirt disappears into mud — the 4-inch crushed base is the patio. Going deeper than 2.5 inches. Comfortable gravel patios are thin; deep gravel is a sandbox. No edging. The #1 cause of “my patio looked great in May” — the stone migrates within a season. Cheap fabric. Thin weed barrier shreds under the compactor and lets soil rise through the stone. Ordering exact yards. Between compaction, settlement, and spillage, exact yards guarantee a shortfall — the second delivery costs more than the extra half yard would have.
Pea Gravel Patio FAQ
Straight answers, no fluff. Then run your own numbers above.
How deep should pea gravel be on a patio?
Plan on 2 to 2.5 inches of loose pea gravel over a 4-inch compacted base of crusher run. Go deeper than 2.5 inches and patio furniture legs start sinking and wobbling — the loose layer has to stay thin enough to walk on comfortably.
Do I need a base layer under a pea gravel patio?
Yes. Pea gravel laid straight on dirt sinks, migrates, and turns to mud after rain. A 4-inch layer of compacted crusher run (dense-grade aggregate with fines) gives the loose top something firm to sit on and keeps the stone from disappearing into soft soil.
Pea gravel patio vs pavers — which is better?
Pea gravel wins on cost and drainage and goes in fast — roughly a third of the material cost of a paver patio, no cutting or leveling courses. Pavers win on stability, maintenance, and resale value. If you want a hardscape surface, see our paver base sand and gravel guide; this guide is strictly for loose-gravel patios.
How many bags of pea gravel do I need for a 10x10 patio?
A 10×10 patio needs about 0.77 cubic yards of loose pea gravel at 2.5 inches — roughly 42 bags at 0.5 cubic feet per bag if you buy it bagged, before overage. With the 20% settlement buffer, plan on about 50–55 bags. Bulk is almost always cheaper at this size and up.
Does a pea gravel patio need edging?
Absolutely — edging is the one non-negotiable detail. Without a rigid edge, the loose top layer migrates onto the lawn and the edges crumble within a season. Steel, aluminum, or heavy plastic paver edging pinned with 8–10 inch landscape spikes holds the patio's shape.
Will a pea gravel patio wash away or shift around?
Some. Loose stone displaces under feet, chair legs, and running dogs, and heavy rain can push it if the grade is wrong. Grading the base to slope 1 inch per 8 feet away from the house, keeping the top layer at 2–2.5 inches, and raking it back a few times a season handles nearly all of it.
Do I need landscape fabric under pea gravel?
Yes — a quality landscape fabric between the soil and the crushed base keeps soil and weeds from migrating up into the stone and keeps the stone from sinking into the soil. Skip it and you'll be topping up gravel every year.
Can I put pea gravel directly on dirt?
You can, but you shouldn't. It sinks into the soil, weeds punch through within weeks, and mud mixes in after rain, ruining the clean look. The fabric plus the 4-inch compacted base is what makes a loose-gravel patio last years instead of months.
References
- Material densities: published bulk-material density tables cross-checked against supplier data (see /data-sources/).
- ASTM C33 aggregate density ranges
- Pricing: published contractor cost guides and supplier listings, checked October 2026.
Run your own numbers
Reading is good. Math is better. Punch your project into the free calculator and order with confidence.