How to Work Out Volume For ALL Shapes Of Ponds. Free Calculator

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calculators Pond Volume Regular Shapes

Basic Instructions On The Spreadsheet

Pond Volume Estimation Assistance. For Irregular Shapes ... It is always very difficult to be exact in calculating pond volumes Despite this it is important to have a good estimate of the amount of water in the pond system This spreadsheet is designed to offer assistance. I have created a method I call "counting the squares" ... it makes calculation for the pond volume of any pond shape easy ...  calculators Pond Volume Any Pond Shapes

I suggest you go to the calculator directly but if you just want to understand the method here's the description I use

How To Calculate Water Volumes For Any Garden Fish Pond of Any Shape

At some stage or another (pond treatments, medical dosages etc) you'll need to calculate the pond's volume. The fundamental formula is simple .... the volume of any pond is the surface area multiplied by its average depth. However getting both these numbers correct can be a major challenge for most of us. It's also true that total precision is not really necessary yet the more accurately you know both average depth and surface area then accurate your calculation of pond volume will be.

The method to work out pond volume is called counting the squares.

• The surface area ... most pond have a constant shape although some have inclined sides. If your pond does have inclined sides and you believe this will make a significant difference to the accuracy of your calculation then use this same technique for the surface and the base of the pond and then average the 2 area results before multiplying by the average depth

• The average pond depth

Step 1 ... getting the average depth right.

If you have a pond and the depth is not constant you can make a very good estimate by taking a stick.

1. Mark the stick or pole at 1 inch (2.5 cm) intervals using an indelible ink pen.

2. Insert the stick at 10 different places in the pond covering the general contours of the pond bottom and record each depth, By the tme you've finished you'll have 10 numbers.

3. Add the numbers together and divide by 10.

4. Use this answer as the average depth of the pond.

Counting The Squares To Get Pond Surface Area

This is the method explained in detail:

1. The pond was first drawn to scale using graph paper or something similar like a spreadsheet (this sketch was done on a spreadsheet)

2. The blue part of the sketch is the actual pond surface area and as a rough guess it is about 50% of the total rectangles area but let's get more accurate ...

3. Each square in the sketch has a constant size. As you can see the total squares covered in the total rectangular area is 11 (across) x 12 (down) = 132 squares.

4. The total yellow squares must now be estimated. I estimate about 21 full squares are covered by the yellow bits. If you get a bit different it does not matter much.

5. Now count the white squares I get 56.

6. This means you can now calculate the number of squares covered by the blue pond as follows:

7. 132 21 56 = 53 squares

8. If each square is 0.2 x 0.2 metres then area covered by pond is as follows:

9. 53 x 0.2 x 0.2 = 2.12 sq metres

10. If average depth of pond is 0.5 metres then pond volume is

11. 2.12 x 0.5 x 1,000 = 1,060 litres

Knowing the volume of your pond is important if you want to specify other equipment correctly. Once again if you are not sure seek help.

While considering pond volume 1,000 litres of water is a good volume to hold about 1 kg of fish.

Pond volume units conversion table

Read across the table to get equivalent units eg 1 US gallon = 0.8 imperial gallons = 0.1 cu feet and so on (these numbers are to 1 decimal place only and so treat as approximate)

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Tip when you download the Excel file ...

Use right click then select "Save Target As ..." to save the file on your own hard drive. All the calculators are interactive so I suggest you save the master copy just in case you make an incorrect change.

calculators Pond Volume Regular Shapes

How To Convert Different Measurement Units

• To convert gallons to litres multiply by 4.54

• gallons to US gallons multiply by 1.2

• US gallons to litres multiply by 3.78

• cu.feet to gallons multiply by 6.23

• cu.feet to US gallons multiply by 7.48

• inches to cm multiply by 2.54

• feet to metres multiply by 0.305

• pounds to kilograms multiply by 2.2

• sq. feet to sq. Metres multiply by 0.093

• To convert cu metres to litres multiply by 1000

Of course to convert in the other direction you divide by the factor. For example to convert litres to gallons you would divide by 4.54