Driveways, Bases & Pads · Contractor Estimation Tool

Paver Patio Base & Leveling Sand Calculator

Estimate compacted road base gravel (4–6") and bedding sand (1") required underneath concrete, brick, or flagstone pavers.

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How the Paver Patio Base & Leveling Sand Calculator Works

Graded aggregate base (typically 3/4"-minus stone blended with stone dust) engineered to achieve high mechanical compaction when moistened and rolled. Our Paver Patio Base & Leveling Sand Calculator computes exact geometric volume in cubic feet and cubic yards, then converts volume into US short tons (2,000 lbs) using the typical bulk density of Road Base (Crusher Run / ABC / QP) (2,970 lb/yd³ or 1.49 tons/yd³).

Mathematical Formula for Paver Patio Base:
1. Area (sq ft) = Length (ft) × Width (ft)
2. Volume (cu ft) = Area (sq ft) × [Depth (inches) ÷ 12]
3. Volume (cu yd) = Volume (cu ft) ÷ 27
4. Recommended Volume = Base Volume × (1 + 15% Ordering Adjustment)
5. Estimated Tons = Recommended Cubic Yards × 1.49 tons/yd³

Step-by-Step Worked Example

Example Project: 20 ft × 15 ft Area at 4 Inches Depth (+15% Adjustment)

Surface Area: 20 ft × 15 ft = 300 sq ft.
Base Volume: 300 sq ft × (4 ÷ 12) = 100.0 cu ft (3.70 cubic yards).
With +15% Ordering Adjustment: 3.70 yd³ × 1.15 = 4.26 cubic yards.
Weight in US Short Tons: 4.26 yd³ × 1.49 tons/yd³ = 6.32 tons (12,650 lbs).

Primary Applications & Contractor Best Practices

Structural sub-base for driveways and private lanes: Engineered for reliable coverage, drainage stability, and long-term performance.
Paver patio and interlocking stone base layers: Engineered for reliable coverage, drainage stability, and long-term performance.
Asphalt and concrete sub-grade preparation: Engineered for reliable coverage, drainage stability, and long-term performance.
Heavy equipment parking pads: Engineered for reliable coverage, drainage stability, and long-term performance.

Coverage & Tonnage Quick Reference Table (Road Base (Crusher Run / ABC / QP))

Estimated cubic yards and US short tons (including +15% ordering adjustment) across common project square footages:

Project Area	2" Depth	3" Depth	4" Depth	6" Depth
100 sq ft	1.05 t (0.71 yd³)	1.58 t (1.06 yd³)	2.11 t (1.42 yd³)	3.16 t (2.13 yd³)
250 sq ft	2.64 t (1.77 yd³)	3.95 t (2.66 yd³)	5.27 t (3.55 yd³)	7.91 t (5.32 yd³)
500 sq ft	5.27 t (3.55 yd³)	7.91 t (5.32 yd³)	10.54 t (7.10 yd³)	15.81 t (10.65 yd³)
1,000 sq ft	10.54 t (7.10 yd³)	15.81 t (10.65 yd³)	21.08 t (14.20 yd³)	31.63 t (21.30 yd³)
1,500 sq ft	15.81 t (10.65 yd³)	23.72 t (15.97 yd³)	31.63 t (21.30 yd³)	47.44 t (31.94 yd³)

Frequently Asked Questions

Multiply your project length (20 ft) by width (15 ft) to get area (300 sq ft). Multiply by depth in feet (4 in ÷ 12 = 0.33 ft) to get 100.0 cubic feet, then divide by 27 to get 3.70 base cubic yards. Adding a 15% ordering adjustment gives 4.26 yd³, which equals 6.32 US short tons at 2970 lb/yd³.

One cubic yard (27 cubic feet) of Road Base (Crusher Run / ABC / QP) weighs approximately 2,970 pounds, or 1.49 US short tons (110 lbs per cubic foot). Typical regional quarry densities range between 2,850 and 3,200 lb/yd³.

For most paver patio base installations, a typical compacted depth is 6 inches (our default preset uses 4 inches). Always excavate soft organic topsoil and install woven or non-woven geotextile fabric before spreading aggregate.

At 1.49 tons per cubic yard, 1 US short ton equals 0.67 cubic yards (18.2 cu ft). That covers approximately 109 sq ft at 2" deep, 73 sq ft at 3" deep, and 55 sq ft at 4" deep.