Pool cover evaporation comparison calculator

Calculate observed water saved and reduction versus uncovered with your own figures.

Your numbers

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

Use observed water saved and reduction versus uncovered to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Observed uncovered loss (mm/day)
5
Observed covered loss (mm/day)
1
Exposed surface area (m²)
40
Comparison days
30
Observed water saved (L)
4800
Reduction versus uncovered (%)
80

Try another scenario

Observed uncovered loss (mm/day)
5.5
Observed covered loss (mm/day)
1
Exposed surface area (m²)
40
Comparison days
30
Observed water saved (L)
5400
Reduction versus uncovered (%)
81.818182
Calculation method

Calculation method

Observed water saved (L)

Savings=(uncovered-covered)×area×days; 1mm over1m²=1L.

Reduction versus uncovered (%)

Savings=(uncovered-covered)×area×days; 1mm over1m²=1L.

Symbols and units
a
Observed uncovered loss (mm/day)
b
Observed covered loss (mm/day)
c
Exposed surface area (m²)
d
Comparison 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

  • Same conditions assumed; negative savings retained if measured covered loss is greater. 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. Same conditions assumed; negative savings retained if measured covered loss is greater.
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