How do I calculate water use from meter readings?
Subtract the previous meter reading from the current reading, then multiply by the gallons represented by each meter unit. For many bills, 1 CCF is about 748 gallons.
Water meter reading calculator
Convert water meter readings into gallons, CCF, and daily use.
Use this when a bill shows previous and current meter reads but you need to understand actual water use, daily pace, and the usage charge before sewer and fixed fees.
Water bill
$114
Water use$46.00
Sewer$41.00
Service$27.00
All-in rate
$15.83 per 1k gal
Best next check
Leak and irrigation
Convert meter reads to water use
Enter the previous and current reads exactly as they appear, then set how many gallons each meter unit represents.
Water used
5,236 gal
7 meter units, about 7 CCF.
Daily water use
169 gal
Gallons used divided by billing days, useful for leak and household comparisons.
Usage charge
$32.73
Estimated from $6.25 per 1,000 gallons before base, sewer, and stormwater fees.
Rollover used
No
A rollover is used only when the current read is lower than the previous read.
Meter reading note
Use the same units printed on the meter or bill. Some meters show gallons, some show CCF, and some show hundreds of cubic feet.
For a common water bill unit, 1 CCF is about 748 gallons. If your bill already shows gallons, set gallons per meter unit to 1.
Use the meter result next
Tiered water bill calculator
Apply the gallons from the meter read to a tiered water rate table.
Open pageEstimated meter read adjustment calculator
Check whether an actual read added catch-up gallons or CCF from earlier estimated bills.
Open pageWater bill calculator
Add the usage result to base fees, sewer, stormwater, and other water bill charges.
Open pageFAQ
Short answers for search visitors and bill-checking moments.
What if the current water meter reading is lower than the previous reading?
That may mean the meter rolled over. Use the rollover value printed by the meter type or utility, then confirm the reading before treating the result as final.
Why does my water bill differ from the meter usage charge?
The usage charge is only part of the bill. Base fees, sewer charges, stormwater fees, minimums, taxes, and billing corrections can make the final bill higher.