Preliminary Stormwater Storage Module Estimator

Preliminary planning only. This estimator does not confirm hydraulic design, structural capacity, loading, groundwater conditions, approvals, product suitability, or compliance. Confirm all assumptions with the responsible project professionals.

Enter preliminary inputs

Use a known storage target when one is available. Alternatively, the area method calculates area × rainfall depth ÷ 1,000 × runoff coefficient. The adjustment is controlled by the user. A zero adjustment leaves the calculated volume unchanged. Effective capacity must be entered for the specific module under consideration. Dimension mode multiplies length, width, height, and void ratio. Quantity rounds up to a whole module. Product dimensions are never assumed. Void ratio is user entered. Loading information remains outside this tool. Costs are not generated. Performance claims are not made. Approval requirements remain outside this calculator. Record the inputs alongside the result. Recheck units before sharing a preliminary quantity.