Driveways, Bases & Pads · Contractor Estimation Tool

RV & Boat Gravel Parking Pad Calculator

Estimate heavy-duty compacted base and surface stone for Class A motorhomes, fifth-wheel trailers, boats, and equipment pads.

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How the RV & Boat Gravel Parking Pad Calculator Works

Crushed stone blended with rock dust fines (often marketed as #411, Item #4, Crusher Run, or QP) that compacts into a firm surface under vehicle traffic. Our RV & Boat Gravel Parking Pad 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 Driveway Gravel (Dense-Grade / Item #4) (2,835 lb/yd³ or 1.42 tons/yd³).

Mathematical Formula for RV Parking Pad:
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 × 1.42 tons/yd³

Step-by-Step Worked Example

Example Project: 40 ft × 14 ft Area at 6 Inches Depth (+15% Adjustment)

Surface Area: 40 ft × 14 ft = 560 sq ft.
Base Volume: 560 sq ft × (6 ÷ 12) = 280.0 cu ft (10.37 cubic yards).
With +15% Ordering Adjustment: 10.37 yd³ × 1.15 = 11.93 cubic yards.
Weight in US Short Tons: 11.93 yd³ × 1.42 tons/yd³ = 16.90 tons (33,810 lbs).

Primary Applications & Contractor Best Practices

Residential and rural driveways: Engineered for reliable coverage, drainage stability, and long-term performance.
RV, trailer, and boat parking pads: Engineered for reliable coverage, drainage stability, and long-term performance.
Farm lanes and access lanes: Engineered for reliable coverage, drainage stability, and long-term performance.
Driveway resurfacing and maintenance: Engineered for reliable coverage, drainage stability, and long-term performance.

Coverage & Tonnage Quick Reference Table (Driveway Gravel (Dense-Grade / Item #4))

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	1.01 t (0.71 yd³)	1.51 t (1.06 yd³)	2.01 t (1.42 yd³)	3.02 t (2.13 yd³)
250 sq ft	2.52 t (1.77 yd³)	3.77 t (2.66 yd³)	5.03 t (3.55 yd³)	7.55 t (5.32 yd³)
500 sq ft	5.03 t (3.55 yd³)	7.55 t (5.32 yd³)	10.06 t (7.10 yd³)	15.09 t (10.65 yd³)
1,000 sq ft	10.06 t (7.10 yd³)	15.09 t (10.65 yd³)	20.13 t (14.20 yd³)	30.19 t (21.30 yd³)
1,500 sq ft	15.09 t (10.65 yd³)	22.64 t (15.97 yd³)	30.19 t (21.30 yd³)	45.28 t (31.94 yd³)

Frequently Asked Questions

Multiply your project length (40 ft) by width (14 ft) to get area (560 sq ft). Multiply by depth in feet (6 in ÷ 12 = 0.50 ft) to get 280.0 cubic feet, then divide by 27 to get 10.37 base cubic yards. Adding a 15% ordering adjustment gives 11.93 yd³, which equals 16.90 US short tons at 2835 lb/yd³.

One cubic yard (27 cubic feet) of Driveway Gravel (Dense-Grade / Item #4) weighs approximately 2,835 pounds, or 1.42 US short tons (105 lbs per cubic foot). Typical regional quarry densities range between 2,700 and 3,050 lb/yd³.

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

At 1.42 tons per cubic yard, 1 US short ton equals 0.71 cubic yards (19.0 cu ft). That covers approximately 114 sq ft at 2" deep, 76 sq ft at 3" deep, and 57 sq ft at 4" deep.