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## About gravel and stone calculators

Use our gravel and stone calculator to estimate the amount of gravel, stone, sand, topsoil or limestone needed to fill your required area.

## Definition of a gravel and stone calculator

A gravel and stone calculator is an **automated program** used to
**estimate the amount of **gravel or stone, in volume or weight,
**to fill a given area**. Typically in the US gravel or stone is
**sold by the ton** or **the cubic yard**.

## How to calculate how much gravel or stone is needed?

- Determine the width, length, and depth of the area you want to fill
- Multiply width by length (this = Square Footage)
- Convert "depth" from inches into feet by dividing by 12
- Now multiply the square footage (width x length) by the converted depth (depth inches / 12)
- This is the total cubic feet needed.
- To Convert into cubic yards, start by dividing cubic feet by 27
- Finally, ask your supplier what the density of the gravel or stone you will be using to convert into tons.
- Typically gravel has a density of 1.42 t/yd³. So multiply the density by the cubic yard to equal total tons.

## Equation

(((w x l) x (d / 12)) / 27 ) * Density = Ton

w = Width, l = length, d = depth

w = Width, l = length, d = depth

## Example

Mr. Calculate needs one layer of gravel covering 20 feet by 20 feet at 6 inches deep.

(((20 x 20) x (6 / 12)) / 27 ) * 1.42 = 10.52 tons

The different gravels and stone types all have different densities. Best to call your local supplier to find their densities.