Aquarium batch water preparation calculator

Calculate container batches per water change and total batches with your own figures.

Your numbers

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

Use container batches per water change and total batches to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Planned water changes (L)
40,30,50
Usable preparation container capacity (L)
25
Preparation time per batch (minutes)
60
Preparation window (minutes)
300
Container batches per water change
[2,2,2]
Total batches
6
Sequential preparation time (minutes)
360
Time-window margin (minutes)
-60

Try another scenario

Planned water changes (L)
40.0,30.0,51.0
Usable preparation container capacity (L)
25
Preparation time per batch (minutes)
60
Preparation window (minutes)
300
Container batches per water change
[2,2,3]
Total batches
7
Sequential preparation time (minutes)
420
Time-window margin (minutes)
-120
Calculation method

Calculation method

Container batches per water change

Each separate change gets ceil(change/containerCapacity) full or partial batches.

Total batches

Each separate change gets ceil(change/containerCapacity) full or partial batches.

Sequential preparation time (minutes)

Each separate change gets ceil(change/containerCapacity) full or partial batches.

Time-window margin (minutes)

Each separate change gets ceil(change/containerCapacity) full or partial batches.

Symbols and units
a
Planned water changes (L)
b
Usable preparation container capacity (L)
c
Preparation time per batch (minutes)
d
Preparation window (minutes)

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

  • One container processed sequentially; no water-treatment readiness or chemistry recommendation. 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. One container processed sequentially; no water-treatment readiness or chemistry recommendation.
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