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Gravel Driveway Calculator · Free calculator

Gravel Driveway Calculator

Enter length, width and depth to get cubic yards, 0.5 cu ft bag (~50 lb) counts, weight and cost — or jump straight to a size from the chart below (13 common US sizes, pre-calculated at 4").

Quick answer

Default 12x50 @ 4"
8.15 yd³
0.5 cu ft bag (~50 lb)
440
Waste factor
10%
Sizes pre-calculated
13

▍Gravel Calculator

Material
ft
in
ft
in
in
Waste Factor
$
L = 50' 0"W = 12' 0"D = 4"
Cubic Yards
8.15yd³
incl. 10% waste · Bulk delivery: order 8.25 yd³
Cubic Feet
220.00ft³
Area
600.0sq ft
Weight
11.41tons
Weight
22,815lbs
Gravel bags needed
  • 0.5 cu ft bag (~50 lb) (0.5 ft³ yield)440

Gravel Driveway size chart @ 4"

10% waste included. Tap a size for depth options, cost and the full material list.

SizeAreaCubic yards0.5 cu ft bag (~50 lb)sTons
8x864 sq ft0.87 yd³471.22
10x10100 sq ft1.36 yd³741.90
10x12120 sq ft1.63 yd³882.28
12x12144 sq ft1.96 yd³1062.74
12x16192 sq ft2.61 yd³1413.65
12x20240 sq ft3.26 yd³1764.56
16x20320 sq ft4.35 yd³2356.08
20x20400 sq ft5.43 yd³2947.60
20x24480 sq ft6.52 yd³3529.13
24x24576 sq ft7.82 yd³42310.95
24x30720 sq ft9.78 yd³52813.69
30x401200 sq ft16.30 yd³88022.81
40x602400 sq ft32.59 yd³1,76045.63

How the math works

  1. Area = length (ft) × width (ft)
  2. Volume (cu ft) = area × depth (in) ÷ 12
  3. Add waste: × 1.10
  4. Cubic yards = cubic feet ÷ 27
  5. Bags = cubic feet ÷ bag yield (0.5 cu ft bag (~50 lb) = 0.5 cu ft) — always round up
  6. Weight = cubic yards × 2,800 lb/yd³

Trade pro tips

  • Build in layers: 4" of #3 (2"–3") stone, 4" of #57, then 2" of crusher run / dense grade on top.
  • Lay non-woven geotextile over clay soil first — it stops stone from sinking.
  • Crown the driveway ½" per foot so water sheds to the sides.
  • Spread with a box blade and compact each layer before the next.

Frequently asked questions

How deep should a gravel driveway be?

A new driveway needs 8"–12" total in layers (4" large stone, 4" #57, 2" crusher run). A refresh of an existing driveway needs only 2"–4" of top stone.

How much does a cubic yard of gravel weigh?

About 1.4 tons (2,800 lbs) for crushed stone. Pea gravel and river rock run 1.3–1.5 tons per yd³.

How many square feet does a ton of gravel cover?

At 4" deep, one ton of crushed stone covers about 58 sq ft; at 2" about 116 sq ft.

Do I need landscape fabric under a gravel driveway?

On clay or soft soil, yes — a non-woven geotextile keeps the stone from pumping into the mud and can halve the stone you need over time.