Water Bill Estimator Home » Services » Water Billing » Water Bill Estimator Page Content The bill calculator is designed to give residential customers an * estimate * of what the changes to their quarterly water and sewer bill might look like with the new rate structure and prices. The calculator does not include stormwater rates, which are also a part of City of Ann Arbor water bills. All amounts are shown including the 10% early payment discount. Getting an estimate is as easy as 1, 2, 3: Step 1: Find out your meter size (5/8" is the most common) Step 2: Enter your consumption in CCF (this can be found on your current bill) Step 3: Hit Submit Consumption is measured in CCF, which is 100 Cubic Feet or 748 gallons. 1. Water Quarterly CCF 2. Sewer Quarterly CCF 3. Meter Size 5/8(.62)"3/4(.75)"1"1.5"2" Disclaimer: This calculator is designed to provide an estimate of the changes anticipated in water and sewer bills. The correct volume will impact this calculation and does not include stormwater fees/charges or fines/penalties.