**Dimensions of the Shed**: Length and width of the foundation area.**Gravel Depth**: Typically, gravel foundations are 4 to 6 inches deep.**Gravel Type**: Crushed stone or gravel is commonly used.

To determine how much gravel you need for a shed foundation, you'll need to consider three main factors:

**Calculation Steps**

**1. Calculate the Area**: Multiply the length and width of the foundation area to get the total square footage.

`Area = Length × Width`

**2. Convert to Cubic Feet**: Multiply the area by the depth (convert inches to feet by dividing by 12).

`Cubic Feet = Area × (Gravel Depth (in inches) / 12)`

**3. Convert Cubic Feet to Cubic Yards**: There are 27 cubic feet in 1 cubic yard.

`Cubic Yards = Cubic Feet / 27`

**4. Gravel Coverage**: Most gravel is sold by cubic yards. Knowing the number of cubic yards you need will help you purchase the right amount.

**Example**

For a 10x12 foot shed foundation with a gravel depth of 4 inches:

**Area** = `10 × 12 = 120 sq ft`

**Cubic Feet** = `120 × (4 / 12) = 40 cubic feet`

**Cubic Yards** = `40 / 27 ≈ 1.48 cubic yards`

So, you'd need approximately **1.5 cubic yards** of gravel for a 10x12 shed with a 4-inch deep foundation.

Gravel Size (inches) | Weight (tons per cubic yard) |
---|---|

2 | 1.40 |

1.75 | 1.45 |

1.5 | 1.50 |

1.25 | 1.55 |

1 | 1.60 |

3/4 | 1.65 |

1/2 | 1.68 |

1/4 | 1.70 |

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