Water Efficiency Calculator

Calculate indoor water use savings from efficient fixtures compared to EPA baseline for LEED WEc2 credit analysis.

Number of Occupants (FTEs)

Workdays per Year

Toilet (GPF)

Urinal (GPF)

Lavatory Faucet (GPM)

Showerhead (GPM)

Male Occupant Ratio (%)

Tab to move between fields

Water Savings (%)

39.2%

Baseline Use (gal/yr)80,938

Proposed Use (gal/yr)49,188

Annual Savings (gal)31,750

LEED WEc2 Points3

Cost Savings ($/yr)$191

How to Use This Calculator

Enter Number of Occupants (FTEs) and Workdays Per Year for the building.
Enter fixture flow rates: Toilet GPF, Urinal GPF, Lavatory Faucet GPM, and Showerhead GPM.
Enter Male Occupant Ratio percentage for combined toilet/urinal usage calculations.
Review Water Savings percentage vs EPA baseline and Annual Savings in gallons.
Check LEED WEc2 Points earned and Annual Cost Savings to quantify the financial benefit.

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