Pond Volume Calculator – How to measure a pond’s volume?

How to Measure Pond Volume:

The formula used to calculate the volume of water depends on the shape of your pond. Use this table as a guide to determine the inputs you need to use our pond size calculator.

What You'll Need:

  • Rope/Twine
  • Electrical Tape
  • Metal/Wooden Stake
  • Weight
Backyard pond with triangle sun shade -Kari H

Square/Rectangle:

To start:
Tie one end of the rope to the stake and then secure the stake into the ground at the corner of the longest side of your pond

To get length & width:
Walk the side of the pond while holding the rope and then use a piece of electrical tape to mark off the distance to the end. Repeat for shorter side.

Circular/Oval

To start:
Tie one end of the rope to the stake and then secure the stake into the ground at the edge of 

To get diameter:
Walk to the opposite side of your pond while holding the rope and then use a piece of electrical tape to mark the distance.*For oval or irregularly shaped ponds, take measurements from multiple locations and average them together. your pond.

To Get Average Depth:

Tie a weight to the end of your rope and drop it to the bottom and then pull the rope taut before marking the rope. Repeat in at least 3 places and average the results.**For large ponds we recommend taking measurements from a boat.

***If you have a VERY irregularly shaped OR large pond, we recommend this guide from ACES.edu

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