Camper toilet cassette autonomy calculator

Calculate days until first emptying at capacity and maximum interval after full emptying with your own figures.

Your numbers

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

Use days until first emptying at capacity and maximum interval after full emptying to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Cassette usable capacity (L)
18
Initial contents (L)
2
Measured daily fill (L/day)
5
Planning duration (days)
7
Days until first emptying at capacity
3.2
Maximum interval after full emptying (days)
3.6
Required emptyings before trip end
2

Try another scenario

Cassette usable capacity (L)
19.8
Initial contents (L)
2
Measured daily fill (L/day)
5
Planning duration (days)
7
Days until first emptying at capacity
3.56
Maximum interval after full emptying (days)
3.96
Required emptyings before trip end
1
Calculation method

Calculation method

Days until first emptying at capacity

First=(capacity-initial)/daily; repeat every capacity/daily; count capacity crossings strictly before trip end.

Maximum interval after full emptying (days)

First=(capacity-initial)/daily; repeat every capacity/daily; count capacity crossings strictly before trip end.

Required emptyings before trip end

First=(capacity-initial)/daily; repeat every capacity/daily; count capacity crossings strictly before trip end.

Symbols and units
a
Cassette usable capacity (L)
b
Initial contents (L)
c
Measured daily fill (L/day)
d
Planning duration (days)

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

  • Uses measured filling and entered usable capacity; no sanitation or legal disposal advice. 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. Uses measured filling and entered usable capacity; no sanitation or legal disposal advice.
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