Home / Products / Bund Calculator Collapsible Bund Configurator. Calculate AS1940 compliant containment capacity, select the right material, and configure a custom bund for your site. How this calculator works 1 Enter the volumes you need to contain 2 We calculate the AS1940 minimum capacity 3 Choose material based on chemical stored 4 Set dimensions and add to your quote Need help sizing? Our team can help you spec the right bund for your site conditions and compliance requirements. Call Us Email us