Crushed Stone Calculator

Created by AbdulRafay Moeen
Reviewed by Steven Wooding
Last updated: Apr 26, 2022

Using our crushed stone calculator, you can find the quantity and weight of the crushed stone or gravel that you'll need to layout or fill an area.

The following article discusses what crushed stones are, their different sizes and how we can use these crushed stones.

You're then given a guide on how to use the crushed stone calculator for calculating crushed stone in tons or yards while also sharing the formula for manually calculating the crushed stone in yards, then helping you convert that into tons.

Using our tool, you'll be able to calculate how much crushed stone you need for your next project. 😊

🔎 Check out our cubic yards to tons converter for a more precise volume to weight conversion of different materials.

What are crushed stones?

When processed together, several different rock fragments make up crushed stones, also called crush for simplicity. The most commonly found rocks of mixed qualities and quantities in crushed stones are:

  • Argillite;
  • Dolomites;
  • Granites;
  • Limestones;
  • Marbles;
  • Sandstones;
  • Slates;
  • Traprocks;
  • Quartzite; and
  • Volcanic cinder.

How to use crushed stones of different sizes

Using crushers, we can crush stones in various forms and sizes. Different crush sizes can have different uses.

Here's a list of standard crush sizes with their uses:

  • Stone dust – Used in concrete block fabrications, filling walls, patching holes, and building smooth pavements.

  • Up to 1/4 – Used in barns, ground fillers, horse stables, tennis courts, and walkways.

  • Up to 1/2 – Mixed in asphalt and concrete for roads, water tank beddings, filtration, and various environmental applications, such as landscaping and building.

  • Up to 3/4 – Used in bedding for large pipes, drainage, driveways, farm roads, french drains, path fillers, and slab bases.

  • Up to 1″ – Best suited for pavements, road bases, and jogging tracks.

  • Up to 11/4 – Used as a base material for driveways, rough terrain pads, and temporary paths for heavy-duty trucks at construction sites.

  • Up to 2″ – Drainage, dry wells, septic systems, and railroad tracks.

  • Up to 4″ – Drain outfall areas, heavy-duty haul roads, septic tanks, and slopes.

That's how we use crushed stones of varying sizes.

How to use our crushed stone calculator for yards

Here's how you can use the crushed stone calculator:

  1. Select your surface shape, e.g., Rectangular.

  2. In surface length, enter the length of your surface, e.g., 12 feet.

  3. In surface width, enter the width of your surface, e.g., 8 feet.

  4. Now, enter in depth, how deep do you want to fill the layout of your surface, e.g., 3 inches.

  5. The waste factor tells how much crushed stone wastes during the layout process, e.g., 10% (default).

Once you've entered the above information, you get the following:

  1. The required quantity of crushed stone for your layout, i.e., 0.98 cubic yards.

  2. The estimated weight of this crushed stone, i.e., 1.5 tons.

Next, let's look into how we calculate the crushed stone quantity and weight manually.

Calculate how much crushed stone do I need manually

Here are the formulas that we use to calculate how much crushed stone we need manually:

For square or rectangular surfaces:

  • S=(L×W×D)÷27S = (L \times W \times D) \div 27

And for circular or elliptical surfaces:

  • S=(π×L2×W2×D)÷27S = (\pi \times \frac{L}{2} \times \frac{W}{2} \times D) \div 27

where:

  • SS – The required amount of crushed stones in cubic yards;
  • LL – Length in feet, where we want to layout the crush;
  • WW – Width in feet, of the same surface for laying out the crush;
  • DD – The depth in feet for the area which we want to fill with the crush;
  • π\pi – Math constant with a value of 3.1416 approx; and
  • 2727 – Conversion factor from cubic feet to cubic yards.

🙋 When calculating the required crushed stones, we add a standard 10% to the total as a waste factor.

To consider the waste factor in our total, we divide the result by 10 and sum it to the original value:

  • ST=S+(S÷10)S_T = S + (S \div 10)

💡 We can convert the resulting crushed stone volume from yards to its approximate weight in tons by multiplying the result by 1.5.

Let's take an example of finding out how much crushed stone we require for our patio of 15′ × 11′, with a depth of 2″.

Placing the values in the formula, we get:

S=(15×11×0.167)÷27=1.02S = (15 \times 11 \times 0.167) \div 27 = 1.02

So, we require about 1.02 cubic yards without considering the waste factor.

To consider the waste factor, we add an additional 10% to our total:

ST=1.02+(1.02÷10)=1.12S_T = 1.02 + (1.02 \div 10) = 1.12

And thus, the total amount of required crushed stone is about 1.12 cubic yards.

Multiplying the result by 1.5, we get the required weight of our crushed stone as 1.7 US tons.

Also, check out our simple gravel driveway calculator to determine the required amount of gravel for your driveway.

FAQ

How much crushed stone do I require for a 10′ × 20′ × 4″ volume?

About 2.47 cubic yards without considering the waste factor, and 2.72 cubic yards with a waste factor of 10%. That's 3.7 and 4.1 US tons, respectively.

To calculate crushed stone in yards:

  1. Multiply the together the length, width, and depth measured in feet.
  2. Multiply by 27 to convert cubic feet into cubic yards.
  3. Multiply by 1.5 to calculate the weight of the crushed stone in tons.

How do I calculate crushed stone in yards?

To calculate crushed stones in cubic yards for a rectangular surface, use the following formula:

  • S = (L × W × D) × 27

where:

  • S – Required amount of crushed stones;
  • L – Surface length of where you want to fill the crushed stones;
  • W – Surface width where you want the crushed stones; and
  • D – Surface depth, to fill it with the crushed stones.

What is 3/4″ crushed stone used for?

Three-quarter inch crushed stones are most suitable for:

  • Bedding for large pipes;
  • Water drainage;
  • Constructing driveways;
  • Laying out on farm roads;
  • Creating french drains;
  • Used as path fillers; and
  • Slab bases.

How big is a yard of crushed stone?

A yard is equal to 3 feet. So a 1 cubic yard is 3 × 3 × 3 feet or 27 cubic feet.

One cubic yard of crushed stone or gravel weighs around 1.5 US tons, which can fill a volume of 3 cubic feet.

AbdulRafay Moeen
Surface shape
Rectangular
Surface length
ft
Surface width
ft
Depth
in
Waste factor
%
⛰️ Required crushed stone
Quantity
cu yd
Weight
US ton
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