Aquarium overflow drain-down volume calculator

Calculate drain-down volume with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use drain-down volume to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Tank water surface area (cm²)
4000
Shutdown level drop (cm)
2
Return pipe internal volume (L)
3
Drain-down volume (L)
11

Try another scenario

Tank water surface area (cm²)
4400
Shutdown level drop (cm)
2
Return pipe internal volume (L)
3
Drain-down volume (L)
11.8
Calculation method

Calculation method

Drain-down volume (L)

Volume=surfaceArea×drop/1000+pipeVolume.

Symbols and units
a
Tank water surface area (cm²)
b
Shutdown level drop (cm)
c
Return pipe internal volume (L)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • All entered pipe volume assumed to drain; actual siphon behavior must be measured. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. All entered pipe volume assumed to drain; actual siphon behavior must be measured.
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