Pool backwash water demand calculator

Calculate water per cycle and monthly water demand with your own figures.

Your numbers

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

Use water per cycle and monthly water demand to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Backwash measured flow (L/min)
150
Backwash duration (minutes)
4
Rinse measured flow (L/min)
100
Rinse duration (minutes)
2
Cycles per month
4
Water per cycle (L)
800
Monthly water demand (L)
3200

Try another scenario

Backwash measured flow (L/min)
165
Backwash duration (minutes)
4
Rinse measured flow (L/min)
100
Rinse duration (minutes)
2
Cycles per month
4
Water per cycle (L)
860
Monthly water demand (L)
3440
Calculation method

Calculation method

Water per cycle (L)

Cycle volume=flowBack×timeBack+flowRinse×timeRinse.

Monthly water demand (L)

Cycle volume=flowBack×timeBack+flowRinse×timeRinse.

Symbols and units
a
Backwash measured flow (L/min)
b
Backwash duration (minutes)
c
Rinse measured flow (L/min)
d
Rinse duration (minutes)
e
Cycles per month

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

  • Calculation uses the entered values and stated mathematical model; quantities must use the labelled units. 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. Cycle volume=flowBack×timeBack+flowRinse×timeRinse.
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