Calculate pond volume in gallons, cubic feet, cubic yards, acre-feet, liters, and cubic meters. Use this pond volume calculator for backyard ponds, farm ponds, wildlife ponds, garden ponds, koi ponds, retention ponds, water treatment estimates, fish stocking, aeration planning, and water refill calculations.
Rectangle / oval pond:
The calculator multiplies length, width, average depth, and shape factor to estimate water volume.
Round pond:
Enter pond diameter and average depth to calculate circular pond volume.
Surface area × depth:
Enter known pond surface area and average depth to calculate volume directly.
Irregular pond estimate:
Use length, width, depth, and a natural pond shape factor to estimate irregular pond capacity.
A pond volume calculator helps estimate how much water a pond holds for water treatment, aeration, fish stocking, filling, pumping, and maintenance planning.
It can be useful for backyard ponds, farm ponds, wildlife ponds, koi ponds, retention ponds, stock ponds, garden ponds, irrigation ponds, and pond management estimates.
Your result shows estimated pond volume in gallons, cubic feet, cubic yards, acre-feet, liters, cubic meters, million gallons, refill time, surface area, water level adjusted volume, sediment adjusted volume, and treatment estimate.
Multiply pond surface area by average depth. Then convert cubic feet to gallons by multiplying by 7.48052.
One acre-foot is about 325,851 gallons of water.
Use average depth for volume estimates. Maximum depth alone usually overstates pond volume because most ponds have shallow edges and sloped sides.
Measure the longest length, average width, and average depth, then apply a shape factor for sloped or irregular sides. For critical dosing, use a more accurate pond survey.