32 · Calculators & Tools
Live, interactive widgets that turn the formulas in this handbook into answers. Enter your numbers — results update as you type. All metric; US gallons are shown alongside litres.
Pond volume
Estimate how much water your pond holds from its footprint and average depth.
Liner size
Work out the flat sheet you need, including depth and edge overlap.
Pump & turnover
Check your filtration turnover rate and the flow you should be aiming for.
Fish stocking
A safe maximum based on pond volume and species load.
Bog filter sizing
Size a regeneration (plant) zone as a fraction of total pond volume.
Note
These are planning estimates. Real ponds vary with shape, planting, and fish load — under-size equipment and over-stock fish cautiously. The same calculators also appear inline on the relevant chapters.
How to use the calculators
- Select a calculator from the tabs above.
- Enter your measurements in the fields provided.
- Results update instantly — no button to click.
- Write down the results before moving to another calculator.
- Use the print button to save a copy for your records.