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Pond planner

Pond volume
& equipment calculator

Work out the approximate water volume and a starting point for your equipment conversation.

Use the average filled depth, allowing for slopes and shelves. A metered fill is more accurate than measurements.

This compares flow scenarios. Match the final flow to your filter’s specification, fish load, lift and pipework.

Your calculated pond volume

Enter your measurements to see litres, gallons and a flow estimate.

What about fish numbers? →

Use this volume in a pond pack →

Equipment checklist

  • Mechanical + biological filtration. Match fish loading and real water volume to the manufacturer’s koi rating. How filters work →
  • A pump at the right working flow. Use the pump curve at the actual lift and pipe resistance. Choose a pump →
  • Aeration and a backup plan. Oxygen demand rises with fish, feeding and warm water. Oxygen essentials →
  • Testing, dechlorination and maintenance access. Keep water safe and the system serviceable. Your testing routine →
  • UV, where needed. A clarifier helps green water; it does not replace biological filtration. Understand UV →