## How Do I Work Out How Much Gravel I Need For An Area?

October 11, 2016One of the questions we often get asked as a merchant is: **How do I know how much aggregate I’m going to need for this job? **There are two ways of going about this.

**OPTION 1 (the hard way)**: calculate it yourself according to a given formula.

On a driveway, for example, the gravel, stone chips or shingle should be a minimum of 4″ (100mm) deep. If stones are larger, say 40mm or more, you’ll need to have it deeper still. Then use this rough guide (courtesy of http://www.doityourself.com):

#### For stones 1/4″ to 1/2″ : 50 sq. ft. per ton

#### For stones 1/2″ to 1″ : 45 sq. ft. per ton

**For stones 1 1/2″ to 2″ : 40 sq. ft. per ton**

Then you have to measure the area and

**multiply the length x width x depth**in feet. Turn that into**cubic yards**by dividing the total by 27. One cubic yard of gravel is equal to 1.13 tons. Multiply total cubic yards by 1.13 to convert to tons.Head aching yet? If so,

**there’s a much easier way!****OPTION 2 (the easy way)**:

**use an online aggregate calculator**.

There are plenty out there, but this one, from AWBS Ltd, has the advantage that you can

**calculate in metric or imperial**.Just enter the measurements of the area needing aggregate, and the calculator will tell you how many tonnes (or 25kg bags) you will need.

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