Commercial Restroom Water Savings Calculator
See exactly how much water and money you can save by upgrading your commercial restroom fixtures to WaterSense-rated models.
Fill in the fields below and click Calculate. Results are based on IPC 2021 model code and industry best practices. Always verify with your local AHJ.
Why water efficiency matters in commercial restrooms
Commercial restrooms are among the largest water consumers in any building. In a typical office building, restroom fixtures account for 30–40% of total water consumption. Upgrading from 1.6 GPF toilets to 1.28 GPF WaterSense models across a 10-toilet facility saves approximately 100,000 gallons per year — at typical US water rates, that is $700–$1,200 in annual savings.
The business case is straightforward: WaterSense-rated fixtures typically cost the same or only slightly more than standard-efficiency models, and the water savings pay back any cost premium within 1–2 years. Many local utilities also offer rebates for WaterSense fixture installations — check with your local water provider.