Mulch Depot “Material Calculators” are designed to estimate specific product quantities and costs, based on information that the user submits. The logic for each calculation may differ according to each specific product. Calculations are based upon certain factors, assumptions, and general information that we consider appropriate; however, Mulch Depot shall assume no liability whatsoever, for the product suitability, accuracy, pricing, or reliability of the data or calculations provided. All material purchases are considered final and not able to be returned. If you feel that a calculation is inaccurate for any reason, please proceed to the Contact Us link and let us know how we can improve these features.