Paver Base Calculator

A paver base calculator returns the tons of compacted aggregate base a patio or walkway needs. It multiplies the area by the base depth to get cubic feet, adds a waste and compaction allowance, and converts the volume to cubic yards. Cubic yards then convert to tons at 1.5 tons per cubic yard by default.

Last reviewed September 2026Method & sources Report an error

Not to scale.

Patio Area

180 sq ft

Includes a 10% waste allowance.

Shopping list

Compacted aggregate base3.67 tonsAbout 2.44 cu yd.
Either

Breakdown
Patio Area	180 sq ft
Volume	2.44 cu yd
Base Needed	3.67 tons
Estimated Cost

How to Calculate Paver Base

Volume is Area × Depth, with depth converted from inches to feet, plus an allowance for waste and the compaction the base loses once it's tamped down. The result converts to cubic yards, then to tons using a density figure. Compacted aggregate base (crushed stone with fines that lock together when tamped) commonly runs 1.4-1.7 tons per cubic yard depending on the specific material. That is denser than a loose, uniform gravel, so this calculator defaults to 1.5 with an adjustable range. A base under a paver patio is typically compacted in layers rather than dumped and leveled once. That is part of why the waste/compaction allowance here runs a bit higher than a simple gravel bed.

Example: 15 ft × 12 ft patio, 4 in. base depth, default 1.5 tons/cu yd density

A 15 ft × 12 ft patio, 4 in. base depth, default 1.5 tons/cu yd density, 10% waste: 1. Area: 15 × 12 = 180 sq ft 2. Depth in feet: 4 ÷ 12 = 0.333 ft 3. Raw volume: 180 × 0.333 = 60 cubic feet 4. With 10% waste: 60 × 1.10 = 66 cubic feet 5. Cubic yards: 66 ÷ 27 ≈ 2.44 cubic yards 6. Tons: 2.44 × 1.5 ≈ 3.67 tons A driveway needing a deeper 8 in. base on the same footprint would need roughly double this tonnage, since volume scales directly with depth.

Paver Base: Compare Scenarios

Scenario	Patio Area	Volume	Base Needed
Small (10x10 ft patio)	100 sq ft	1.36 cu yd	2.04 tons
Medium (15x12 ft patio)	180 sq ft	2.44 cu yd	3.67 tons
Large (24x20 ft patio)	480 sq ft	6.52 cu yd	9.78 tons

What Is Paver Base?

A paver base calculator converts a patio or walkway's footprint and base depth into the tons of compacted aggregate base needed underneath the pavers. The base layer is what actually carries the load and resists frost heave and settling. The pavers and sand on top of it are largely cosmetic and drainage layers by comparison. That is why getting the base depth and material right matters more than any other part of a paver project.

Paver Base: Pros and Cons

Pros

Adjustable density and depth cover both pedestrian patios and heavier vehicular applications
Waste/compaction allowance reflects that a tamped base settles and needs topping up, not just cut loss
Feeds directly into the Paver Calculator's combined shopping list for a full patio project

Cons

Doesn't determine what depth your specific project needs. That depends on soil conditions, climate (frost depth), and whether the surface will carry vehicle loads, which is a design decision, not a formula this calculator makes
Assumes a simple rectangular area. An irregular patio shape needs its area estimated separately
The default 1.5 tons/cu yd density is a general planning figure. Confirm your specific supplier's product density for a large order

Paver Base: What a Pro Checks

Match base depth to load, not just habit. A pedestrian patio commonly uses about 4 in. of compacted base, while a driveway or anything carrying vehicle weight typically needs 6-8 in. or more.
Don't substitute clean, uniform gravel for real paver base. Paver base includes rock dust and fines that lock together when compacted, which is what gives it its load-bearing strength, and clean gravel with no fines doesn't compact the same way.
Consider geotextile fabric under the base, especially over softer or clay-heavy soil. It helps keep the base material from migrating into the subgrade over time and improves drainage.

Frequently Asked Questions

How deep should paver base be?

It depends on use. A pedestrian patio or walkway commonly uses around 4 in. of compacted base, while a driveway or anything carrying vehicle weight typically needs 6-8 in. or more. Soil type and local frost depth also affect the right depth for your specific site. This calculator computes volume for whatever depth you specify rather than determining it for you.

What's the difference between paver base and regular gravel?

Paver base (sometimes called crusher run or road base) is a graded mix of crushed stone with rock dust and fines included, which lock together tightly when compacted. That interlocking is what gives the base its load-bearing strength. Clean, uniform gravel with no fines doesn't compact the same way and isn't a substitute for a proper structural base.

Why does the waste allowance for base material run higher than for a flat gravel bed?

Because a paver base is compacted in layers with a plate compactor, which reduces its volume noticeably from the loose, delivered state. The 10% default here accounts for that compaction loss in addition to ordinary spillage, on top of whatever your supplier's delivered material already assumes.

Do I need geotextile fabric under the base?

Often recommended, especially over softer or clay-heavy soil, to prevent the base material from migrating into the subgrade over time and to improve drainage. This calculator estimates the base material itself. Fabric is a separate, low-cost material to budget for alongside it.

How many tons of base do I need for my patio?

Multiply your patio's area by the base depth (in feet) to get cubic feet, add a waste/compaction allowance, convert to cubic yards, then multiply by the base material's density (commonly around 1.5 tons/cu yd). A 15 ft × 12 ft patio at 4 in. deep needs about 3.7 tons with the defaults here.

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