Number Crunching for Ponds
Garden Guides offers a few formulas for your convienence.

Posted Monday, March 6, 2006

1/2" Inside Diameter (ID) = 240 GPH (Gallons per hour) Max

3/4" Inside Diameter (ID) = 480 GPH Max

1" Inside Diameter (ID) = 720 GPH Max

1 1/4" Inside Diameter (ID) = 1320 GPH Max

1 1/2" Inside Diameter (ID) = 1800 GPH Max

2" Inside Diameter (ID) = 3000 GPH Max

2 1/2" Inside Diameter (ID) = 4200 GPH Max

3" Inside Diameter (ID) = 6600 GPH Max

*Square or rectangular pond* (edge to edge):

/Length + 2X depth + 2 feet/

/Width + 2X depth + 2 feet/

/=/ Dimensions of pond Liner

*Volume of a square or rectangular pond:*

/Length X width X depth/

/=/ Volume in cubic feet

*Volume of a round pond (3.1416 (pi))*

/Pi X radius squared X depth/

/=/ Volume of round pond in cubic feet

*Volume in gallons of a pond- 7.5*

= Gallons