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Landscaping

Landscaping Gravel Calculator

Estimate how much gravel you need for landscaping projects, driveways, walkways, patios, drainage areas, and garden beds. Enter the area, depth, gravel density, and optional price to calculate cubic yards, tons, bags, and estimated cost.

Gravel Calculator
Project Area
Common driveway depth is often 4–6 inches; paths may use 2–3 inches
Material Assumptions
Typical gravel estimate: 1.3–1.5 tons per cubic yard
Common small bags are 0.5 cu ft
10%
↺ Reset Calculator
⚠ Please enter valid dimensions greater than zero.
Gravel Estimate
0
Tons
0
Cubic Yards
0
Bags
$0
Estimated Cost
Tip: Gravel weight varies by material, moisture, compaction, and supplier. Confirm density and delivery minimums before ordering.

How to Use the Gravel Calculator

  1. Select the shape of the area: rectangle, circle, or known square footage.
  2. Enter the length and width, diameter, or known area.
  3. Enter the gravel depth.
  4. Adjust density, bag size, price, and waste factor if needed.
  5. Click calculate to estimate cubic yards, tons, bags, and cost.
// Rectangle area
Area = Length × Width

// Volume
Cubic Feet = Area × Depth
Cubic Yards = Cubic Feet ÷ 27

// Weight
Tons = Cubic Yards × Density

Gravel Calculator Example

Here is how the calculator works for a small gravel area. Say you are topping a 20 ft × 10 ft parking pad at 4 inches deep, using a density of 1.4 tons per cubic yard:

  1. Area: 20 × 10 = 200 sq ft
  2. Convert depth: 4 ÷ 12 = 0.333 ft
  3. Volume: 200 × 0.333 = 66.7 cubic feet
  4. Add a 10% compaction factor: 66.7 × 1.10 = 73.3 cubic feet
  5. Cubic yards: 73.3 ÷ 27 = 2.72 cubic yards
  6. Tons: 2.72 × 1.4 = 3.8 tons

For a job this size, ordering bulk gravel by the cubic yard or ton is usually far cheaper than buying it in bags.

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Common Gravel Depths

Project Type Typical Depth Notes
Walkway or garden path 2–3 inches Good for light foot traffic
Patio base 3–4 inches Depends on pavers and soil condition
Driveway top layer 4–6 inches May require a deeper base layer
Drainage trench Varies Depth depends on pipe, slope, and soil

Gravel Estimating Tips

Smart Buying Tips

  • Use cubic yards for bulk delivery and bags for small projects.
  • Add a waste or compaction factor, especially for driveways and base layers.
  • Confirm the supplier’s tons-per-cubic-yard estimate for the exact gravel type.
  • Order slightly more if the area is uneven or hard to measure.

Common Mistakes

  • Forgetting to convert inches of depth into feet.
  • Using the wrong density for heavy stone or lightweight decorative gravel.
  • Not accounting for compaction.
  • Ordering by bags when bulk delivery would be cheaper.

Gravel Calculator FAQ

Multiply the area by the depth to get the volume, convert cubic feet to cubic yards by dividing by 27, then multiply by the gravel density to get tons. Add a waste or compaction factor for a more realistic order amount.
Most gravel weighs roughly 1.3 to 1.5 tons per cubic yard, but it varies by material and moisture. Pea gravel, crushed stone, and river rock differ, so confirm the density with your supplier before ordering.
Bulk gravel is usually sold by the ton or cubic yard and is cheaper for large areas. Bagged gravel is sold by cubic feet and is convenient for small projects. This calculator gives all three so you can compare.
Garden paths often use 2 to 3 inches, patio bases 3 to 4 inches, and driveway top layers 4 to 6 inches. Deeper or load-bearing areas may need a separate base layer.
Gravel settles and compacts after it is spread, and some is lost to uneven ground and spillage. Adding about 10 percent helps ensure you have enough to reach the planned depth.

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Gravel Calculator Guide

This gravel calculator helps estimate the amount of gravel needed for landscaping and outdoor projects. It calculates volume from the area and depth, converts cubic feet to cubic yards, applies a waste factor, and estimates tons using a gravel density value.

Most bulk gravel is sold by the ton or cubic yard. Small bagged gravel is usually sold by cubic feet. This tool gives you all three estimates so you can compare delivery options and store-bought bag quantities.

Why Gravel Density Matters

Different materials have different weights. Pea gravel, crushed stone, river rock, limestone, and decorative gravel can vary in density. A general planning estimate is about 1.3 to 1.5 tons per cubic yard, but the supplier’s number should be used before ordering.

Bulk vs. Bagged Gravel

For larger areas like driveways and wide paths, bulk delivery by the cubic yard or ton is usually the most economical option. Bagged gravel costs more per unit but is convenient for small repairs, planters, and tight spaces where delivery is impractical.

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