RightQty

Aggregates & landscaping

Gravel calculator

Enter the shape, measurements, and gravel depth. Get the volume to order, approximate weight, overage, and an optional material cost.

Project measurements

Calculate your gravel quantity

Measurement system
Area shape
Use the finished gravel depth, not the excavation depth.
A rectangular gravel bed labeled length, width, and depth.LengthWidthDepth
Measure the finished area and the even depth of gravel you want—not the total excavation depth.
A practical planning average for mixed bulk gravel.
Overage

Covers spillage, uneven depth, settling, and minor measurement differences.

Advanced material assumptionDefault: 1,680 kg/m³
Leave blank to use the material profile. Ask your supplier for a project-specific density when precision matters.
Optional cost estimateAdd your supplier's price

Material only. Delivery, taxes, labor, and local price differences are not included.

No signup. Your measurements stay in your browser.

Your estimate

Order approximately

4.9cubic yards

Includes 10% overage and is rounded up to the next 0.1 yd³.

Area
360 sq ft
Base volume
4.44 yd³
Approx. order weight
6.92 US tons
See all volume and weight conversions

Base volume

120 ft³

4.44 yd³

3.4 m³

With overage

132 ft³

4.89 yd³

3.74 m³

Approx. weight

13,844.02 lb

6.92 US tons

6,279.54 kg

6.28 t

Take this to your supplier

Shopping list

  • All-purpose gravelIncludes 10% overage. Confirm density and delivery increments with your supplier.4.9 cubic yards
Calculation assumptions
  • Bulk density: 1,680 kg/m³.
  • The area has a uniform finished depth.
  • Quantity includes the selected overage but not a separate compaction factor.

Transparent math

How the gravel calculation works

1

Find the area

Rectangle: length × width. Circle: π × (diameter ÷ 2)².

2

Find the volume

area × gravel depth, after every measurement is converted to the same base unit.

3

Add overage

volume × (1 + overage ÷ 100), then round up to a practical ordering quantity.

Weight is an estimate: volume × bulk density. Moisture, stone size, and compaction change real-world density, so confirm load limits and supplier conversions before ordering.

Worked example

Gravel for a 30 × 12 ft area

For an area 30 ft long, 12 ft wide, and 4 in deep, the base volume is 120 cubic feet, or 4.44 cubic yards. Adding 10% overage gives 4.89 cubic yards, so the practical order quantity is 4.9 cubic yards.

Using the all-purpose gravel profile at 1,680 kg/m³, that order weighs approximately 6.93 US tons. The density is an estimate, so ask the supplier how they convert volume to weight for the specific product.

Measure once, order well

How to measure for gravel

  1. Outline the finished area. Measure the longest length and width for rectangles, or edge-to-edge diameter for circles.
  2. Choose the finished gravel depth. Enter only the gravel layer, not soil removal or a separate compacted base layer.
  3. Split irregular spaces. Calculate simple rectangles or circles separately, then add their order quantities.
  4. Confirm how the supplier sells. Bulk gravel may be sold by volume or weight, while small projects may use bags.

Accuracy & assumptions

What can change the amount you need?

Uneven ground, compaction, moisture, stone grading, and delivery increments can all change the real quantity. The selected overage helps with ordinary variation, but it is not a substitute for site-specific preparation.

Planning estimate

This calculator estimates material quantity, not structural performance, drainage design, vehicle load suitability, or code compliance. Follow manufacturer, supplier, and local requirements.