8 landscaping material calculators to estimate various landscape materials. Estimate gravel, aggregate, sand, soil, mulch, and concrete for your landscaping project. 8 Free Calculators: - Gravel - Soil - Mulch - Concrete - Pavers - Retaining Wall - Area - Volume Enter dimensions in inches, feet, yards, centimeters, or meters. Get results in US customary or metric measurements. Based on the calculators on Inch Calculator(www.inchcalculator.com) that are trusted by millions of people world-wide for material estimation.