Is there a chart to calculate the amount of stone that is needed at different thickness?

Yes, there are charts and calculators available that help estimate the amount of stone needed based on the area to be covered and the desired thickness of the stone layer. These resources typically provide conversions and guidelines for various types of stone, allowing users to input dimensions and receive a calculated volume or weight. It's important to consider factors such as the type of stone and its specific weight when using these tools. You can often find these charts on landscaping or construction websites.