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FigureCalc

Paver Base Calculator

By Uzair Arshad , Senior Civil and Structural Engineer

Last updated: June 6, 2026

A 12 by 12 ft patio with 4 in of compacted gravel and 1 in of bedding sand needs about 1.8 cubic yards of base rock (roughly 2.5 tons) and 0.4 cubic yards of sand. At 2026 prices that runs $100 to $210 in material before delivery. This calculator returns cubic yards, tons, and a 2026 cost range for both gravel and sand from your patio length, width, and depths, with waste built in. Common pitfall: skipping the sand layer — gravel alone will not level pavers properly.

How to use this calculator

This paver base calculator gives you the base rock and bedding sand quantities you need before ordering material for a patio paver project. You get cubic yards, cubic feet, tons, paver base bag counts, and a planning budget in one result card.

Most bad orders happen when depth assumptions are wrong. This tool keeps compacted depth and overage visible so you can calculate paver base needed for your exact project area in square feet.

  1. Measure project length and width in feet at the finished paver block footprint. Multiply to get total square feet. For curves, split the area into rectangles, run each section, then add totals.
  2. Set compacted base depth. Use about 4 inches for many patios and 6 to 8 inches for driveway traffic or weaker soils. Enter compacted depth, not loose dump depth.
  3. Set bedding sand depth. Most installations use about 1 inch of screeded bedding sand above the compacted base.
  4. Set base density. If the supplier has not provided a ticket value yet, 1.5 tons per cubic yard is a practical starting point for many dense-graded blends.
  5. Set overage. Use about 8% for simple layouts, 10% for most projects, and up to 12% where edge cuts and grade correction are heavy.
  6. Click Calculate paver base and review base yards, tons, bedding sand, paver base bags needed, and cost range before placing the order.

Pro tip: Compact in lifts. A 6 inch target usually performs better as two 3 inch lifts with a plate compactor.

Common mistake: ordering exact theoretical volume with no overage. Edge restraints, transitions, and low spots can consume material fast.

Typical paver base and bedding depth by project type

Use this depth guide before running your estimate. Depth assumptions drive tonnage, budget, and long-term performance.

Project type Compacted base depth Bedding sand depth Field note
Walkway3 to 4 in1 inUse geotextile on weaker soils to reduce contamination.
Patio4 in1 inSlope surface about 1/8 to 1/4 inch per foot away from structures.
Residential driveway6 to 8 in1 inVehicle loads usually require thicker compacted base and stronger edge restraint.

If your result is close to a supplier minimum load, round the first order up. Running short usually costs more than carrying a small reserve pile.

For a full breakdown of recommended depths by project type and what happens when the base is too shallow, see our paver base depth guide for patios and driveways.

How the calculation works 

Project Area (sq ft) = Length (ft) × Width (ft)

Base Depth (ft) = Base Depth (inches) / 12
Base Volume (cu yd) = (Project Area × Base Depth in ft) / 27
Base with Overage (cu yd) = Base Volume × (1 + Overage % / 100)
Base (tons) = Base with Overage × Base Density (tons per cu yd)
Base (cu ft) = Base with Overage × 27
Base Bags = round up (Base cu ft / 0.5)

Sand Depth (ft) = Sand Depth (inches) / 12
Sand Volume (cu yd) = (Project Area × Sand Depth in ft) / 27
Sand with Overage (cu yd) = Sand Volume × (1 + Overage % / 100)
Sand (tons) = Sand with Overage × 1.35
Sand (cu ft) = Sand with Overage × 27
Sand Bags = round up (Sand cu ft / 0.5)

Cost Low = (Base tons × $30) + (Sand tons × $35)
Cost High = (Base tons × $65) + (Sand tons × $85)
Project Length
Measured length of the paver area in feet
Project Width
Measured width of the paver area in feet
Compacted Base Depth
Final compacted thickness of the gravel base layer in inches
Bedding Sand Depth
Thickness of the leveling sand layer above the base in inches
Base Density
Weight of the base aggregate per cubic yard in tons (typically 1.4 to 1.6)
Overage
Extra percentage added for compaction loss, edge cuts, and grade correction

The paver base calculator follows a contractor takeoff sequence: convert depth, calculate volume from your project area in square feet, apply overage, then convert to tons and budget. The paver base calculator keeps each step visible so you can audit supplier math before delivery day.

How the paver base formula works

The calculator runs four steps for each material layer (gravel base and bedding sand):

  1. Convert depth to feet: Depth (ft) = Depth (inches) / 12
  2. Calculate raw volume: Volume (cubic yards) = (Project Area × Depth in feet) / 27
  3. Add overage: Adjusted volume = Raw volume × (1 + Overage % / 100)
  4. Convert to tons: Tons = Adjusted volume × Density (tons per cubic yard)

Bag counts divide total cubic feet by bag size (0.5 cubic feet per bag) and round up. The cost range multiplies tons by regional price brackets for 2026.

Quick explanation:

  • Calculate project area (length × width)
  • Convert base and sand depths from inches to feet
  • Compute volume for each layer in cubic yards
  • Add overage to account for compaction loss and waste
  • Convert volume to tons using material density
  • Estimate cost based on typical price ranges for base and sand

The base layer provides structural support and makes up the bulk of the order (measured in tons). The bedding sand layer provides leveling and is a lighter layer with lower tonnage.

Example: 20 ft × 12 ft patio with 4 in base and 1 in bedding sand

Using 1.5 tons per cubic yard density and 10% overage:

  • Project area = 20 × 12 = 240 sq ft
  • Base depth in feet = 4 / 12 = 0.333 ft
  • Base volume raw = (240 × 0.333) / 27 = 2.96 cubic yards
  • Base volume with 10% overage = 2.96 × 1.10 = 3.26 cubic yards (87.9 cu ft)
  • Base weight = 3.26 × 1.5 = 4.89 tons
  • Sand depth in feet = 1 / 12 = 0.083 ft
  • Bedding sand = 0.81 cubic yards (21.9 cu ft), about 1.10 tons
  • Estimated 2026 cost = $185 to $412 for base plus bedding sand

For a full walkthrough with landscaping and driveway examples, see our step-by-step guide on how to calculate paver base.

Practical note:

Small depth changes significantly impact material. Increasing base depth from 4 inches to 5 inches can add over 20% more material cost. Always confirm depth requirements before ordering.

Assumptions and limitations

  • Depth entered should be compacted depth, not loose dump depth. Loose material compacts about 20% to 25%.
  • Density varies by aggregate type and moisture. Confirm your supplier ticket value before the final order.
  • Cost ranges reflect 2026 US bulk pricing. Delivered pricing varies by region, load minimum, and haul distance.
  • Results assume a flat rectangular area. For irregular shapes, split into sections and add totals.

Paver base planning assumptions for 2026

Use this table to align settings with local supplier quotes.

Material Typical density Typical 2026 planning range Best use
Dense graded paver base (crushed rock)1.4 to 1.6 tons/cu yd$30 to $65 per tonPrimary load-bearing base course for patio and driveway paver projects
Crusher run base1.5 to 1.7 tons/cu yd$28 to $62 per tonHeavy compaction applications
Concrete sand bedding1.3 to 1.4 tons/cu yd$35 to $85 per tonScreeded bedding layer under pavers

Mistakes that throw off paver base estimates

First, people estimate loose depth instead of compacted depth. Always enter final compacted depth for the base rock layer.

Second, people skip overage because the patio paver layout looks simple. Edges and grade correction still consume material.

Third, people compare quotes in one unit only. Keep cubic yards and tons side by side to catch density mismatches between crushed rock suppliers.

Frequently Asked Questions

How much paver base do I need for a patio?

Multiply patio area (in square feet) by compacted base depth (in feet), divide by 27 to get cubic yards, then add 8 to 12 percent overage for compaction shrink. A 12 by 20 ft patio at 4 in compacted depth needs 240 × 0.333 / 27 = 2.96 cubic yards with 10 percent waste already factored. At 2026 prices of $30 to $65 per ton (1.5 tons/yd density), that's $135 to $290 for base material. Add 1 in of bedding sand on top: another 0.6 cubic yards. Worked example: a 10 by 30 ft pool deck at 4 in base depth needs 3.7 cubic yards of gravel and 0.74 cubic yards of bedding sand. Common mistake: planning at finished depth rather than compacted depth — base material shrinks 15 to 20 percent under compaction, so a 4 in compacted layer actually starts as a 5 in loose pour.

How many bags of paver base do I need?

Convert cubic yards to cubic feet (× 27), then divide by bag size (usually 0.5 cubic feet) and round up. If your project needs 80 cubic feet, that's 160 bags at 0.5 cubic feet each. At 2026 retail prices of $4 to $7 per bag, that's $640 to $1,120 — compared to $135 to $290 for the same 3 cubic yards delivered in bulk. Bulk delivery becomes much cheaper once you cross 1 cubic yard (54 bags). Worked example: a 6 by 8 ft walkway pad at 4 in base needs 0.59 cubic yards or 32 bags, which is fine for retail bagged purchase. A 12 by 20 ft patio at 4 in needs 160 bags — practically always cheaper to take delivery. Common mistake: assuming bagged 'paver base' is the same as #57 stone in bulk — paver base bags are usually finer crusher run or dense-graded aggregate, which compacts harder.

How deep should paver base be?

Most patios use 4 in of compacted base topped with 1 in of bedding sand. Driveways and high-traffic zones need 6 to 8 in of compacted base because vehicle loads exceed foot-traffic loads by 10× or more. Clay soils need an extra 2 in of base versus sandy soils because clay holds water and freeze-thaw causes more heave. In northern climates with frost penetration below 36 in, follow local code — some municipalities require 8 to 12 in of base on patios alone. Worked example: a Minnesota driveway over clay needs 8 in compacted base (10 in loose); a Florida pool deck over sandy fill needs only 4 in. Common mistake: copying a 'standard' 4 in patio base spec onto a driveway — the pavers crack within two winters, and the relay costs more than the original install. Always size base to the heaviest expected load and the worst expected frost depth.

How do you convert paver base cubic yards to tons?

Multiply cubic yards by aggregate density in tons per cubic yard. Standard planning density for crushed stone base is 1.5 tons per cubic yard — so 3 cubic yards = 4.5 tons. Density varies by aggregate type: #57 stone runs about 1.4 tons/yd, dense-graded #2A modified runs 1.5 to 1.6 tons/yd, crusher run runs 1.5 tons/yd, and bedding sand runs 1.35 to 1.4 tons/yd. Confirm density on your supplier's ticket before signing because some yards run quotes by ton and deliver by yard or vice versa. Worked example: a 12 by 20 ft patio at 4 in compacted base needs 3 cubic yards or 4.5 tons of #2A. Common mistake: ordering by yard when the quote is per ton — paver base at $40/ton looks cheaper than $50/yd until you realize 1.5 tons fits in 1 yard, so the actual yardage rate is $60/yd, not $40.

How much does paver base cost in 2026?

Bulk paver base aggregate runs $30 to $65 per ton in 2026, and bedding sand runs $35 to $85 per ton. Delivered pricing varies by region, load minimum (usually 5 to 10 tons), and haul distance — rural deliveries over 20 miles can add $5 to $15 per ton. A typical 12 by 20 ft patio (3 yards / 4.5 tons of base + 0.6 yards / 0.85 tons of sand) costs $165 to $365 in material and delivery combined. Worked example: a 10 by 12 ft walkway base in suburban Atlanta runs about $80 in stone and $30 in sand delivered. The same project in rural Montana runs $130 to $180 because of delivery distance. Common mistake: comparing supplier quotes without normalizing density — one yard's $40/ton crusher run can deliver less material than another yard's $45/ton #2A modified, depending on how each yard runs density.

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