Pond Volume Calculator Calculate the volume of a pond and the liner area           Depth From top of slope to base of pond   Length Top of slope to top of slope   Width Top of slope to top of slope           Enter either a Slope Ratio or both Base measurements.     Base Length   Base Width           Choose from Metric or US units           Freeboard (ft) Vertical dist. from liquid level to pond top   Anchorage (ft) Allowance for anchor trench   Slack % Each direction           Liner Length   Liner Width   Liner Area           Volume Cubic Meters     Cubic Feet           Volume Barrels (petroleum)     gallons (US)     gallons (Imperial)     litres     Acre-feet         This calculator works for rectangular ponds only. It will provide a volume for tanks with vertical walls if you enter a 0 in the slope ratio box. If you enter a pond base measurement the slope ratio box will be deactivated. A pond can have a different slope on the length and width if you use the base measurements. The values for freeboard, anchorage, and slack are in feet and are based on the experience of Layfield. Please modify these values for your project as appropriate. Conversions are from the CRC Handbook of Chemistry and Physics and use 7 significant figures.   Automatic recalculation