What Paver Base Is and Why It Matters
Paver base — also sold as crusher run, road base, compactable gravel, or dense-graded aggregate — is the engineered foundation layer that separates a long-lasting paver installation from one that cracks, settles, or heaves within a few winters. Unlike clean decorative gravel, paver base is intentionally graded with a range of particle sizes, from coarse 3/4-inch crushed stone down to stone dust fines. That graduation is the source of its strength: when a plate compactor runs over the material, the fines fill the voids between larger stones, and the whole mass locks together into a semi-rigid slab.
At 115 lb per cubic foot, paver base is denser than most landscape gravels. That extra weight reflects the angular, tightly graded particles and the presence of fines. The density also means you need to account accurately for how much material goes into each square foot — underestimating leads to thin spots where pavers can rock, and overestimating creates unnecessary cost and material disposal problems.
Paver base is used under concrete pavers, natural flagstone, brick, and precast wall block. It also serves as the sub-base for gravel driveways, compacted paths, and sport courts. The principle is the same in all these applications: provide a stable, well-draining, frost-resistant foundation that transfers loads from the surface to the subgrade without settling.
How to Calculate How Much Paver Base You Need
The formula converts area and depth to weight, with an extra step for compaction.
Step 1 — compute volume (loose material before compaction):
Length (ft) × Width (ft) × Depth (ft) = cubic feet
Multiply depth in inches by 0.0833 to get feet. Then add 15% for compaction: multiply cubic feet × 1.15.
Step 2 — convert to cubic yards and tons:
Adjusted cubic feet ÷ 27 = cubic yards
Cubic yards × 1.55 = US tons
Worked example — 24 ft × 16 ft paver patio, 6-inch finished base:
Loose material needed: 24 × 16 × 0.5 × 1.15 = 220.8 cubic feet
220.8 ÷ 27 = 8.18 cubic yards
8.18 × 1.55 = 12.7 tons
Order 13 tons (rounding to a convenient delivery size) and you will have a small surplus for leveling low spots after compaction passes.
Paver Base Coverage Table
Coverage figures below are for loose material before compaction. Compacted depth will be approximately 85% of the installed loose depth after a plate compactor makes two or three passes.
| Depth (loose) | Compacted depth | Coverage per ton | Coverage per cubic yard |
|---|---|---|---|
| 2 inches | ~1.7 inches | 104 sq ft | 162 sq ft |
| 3 inches | ~2.6 inches | 70 sq ft | 108 sq ft |
| 4 inches | ~3.4 inches | 52 sq ft | 81 sq ft |
| 6 inches | ~5.1 inches | 35 sq ft | 54 sq ft |
| 8 inches | ~6.8 inches | 26 sq ft | 40 sq ft |
Coverage per ton = (2000 ÷ 115) × (12 ÷ depth in inches). Compact after every 3–4 inch lift for thicker base installations.
How Much Paver Base for Common Projects
Walkway — 3 ft × 40 ft at 4-inch finished base:
Area = 120 sq ft. Loose depth = 4 ÷ 0.85 ≈ 4.7 inches = 0.39 ft
120 × 0.39 = 46.8 cu ft × 1.0 (no additional adjustment, already loose) ÷ 27 = 1.73 cu yd × 1.55 = 2.68 tons. A single 3-ton delivery covers this walkway with slight surplus.
Residential patio — 14 ft × 12 ft at 6-inch finished base:
Loose material needed: 14 × 12 × 0.5 × 1.15 = 96.6 cu ft ÷ 27 = 3.58 cu yd × 1.55 = 5.55 tons.
Order 6 tons. This patio requires two or three compaction passes with a plate compactor. Compact in 3–4 inch lifts if the full depth is installed at once, rather than trying to compact 6 loose inches in a single pass.
Vehicle driveway — 10 ft × 40 ft at 8-inch finished base:
Loose: 10 × 40 × 0.667 × 1.15 = 306.7 cu ft ÷ 27 = 11.36 cu yd × 1.55 = 17.6 tons.
Two tandem dump truck loads handle this volume comfortably. Consider two compaction lifts (4 inches each) for the full 8-inch base, which improves density and long-term stability under vehicle loads.
Segmental retaining wall base pad — 20 ft wall, 12-inch-wide pad at 6 inches deep:
Area = 20 × 1 = 20 sq ft
Loose: 20 × 0.5 × 1.15 = 11.5 cu ft ÷ 27 = 0.43 cu yd × 1.55 = 0.67 tons
Two or three 50-lb bags of crushed stone could substitute at this small scale, but paver base packs better than single-size crushed gravel for block wall foundations.
Buying and Delivery Tips
What to call it: The same product goes by different names at different suppliers — ask for “crusher run,” “road base,” “compactable gravel,” “DGA” (dense-graded aggregate), or “#411 stone” depending on your region. All refer to graded, angular crushed stone with fines that compact into a solid base. Avoid substituting clean 3/4-inch crushed stone: without fines, it never fully locks together, and the surface will shift and rut under traffic.
Bulk delivery: Paver base is heavy and almost always purchased in bulk. A typical tandem dump truck carries 14–18 tons. Most residential patios require 5–15 tons, which fits in one delivery. Coordinate placement: once the truck dumps, you move material with a skid steer or wheelbarrow. If the truck cannot access your backyard, dump at the driveway and plan on multiple wheelbarrow trips — factor this into your schedule.
Compaction equipment: A rental plate compactor (80–100 lb) is standard for patios and walkways. For driveways and thicker base sections, a jumping jack compactor or a heavier plate compactor (200+ lb) delivers better results. Renting compaction equipment is almost always necessary — hand tamping produces inconsistent results and leaves a base that settles unevenly once pavers are installed.
Ordering strategy: For any paver project, order paver base, bedding sand, and polymeric joint sand at the same time and schedule them in sequence. Paver base is installed and compacted first; bedding sand follows; pavers are set last. Mixing up the order or running short of base material mid-project causes delays that can span weeks if the supplier’s next delivery slot is already full.
Moisture and weather: Paver base compacts best when slightly damp, not saturated. If heavy rain soaks the base before compaction, wait one to two days for it to drain before running the compactor. Installing and compacting paver base in freezing conditions is not recommended — frozen fines do not compact properly and the base will shift when temperatures rise.