Filling water and pool construction are separate costs
This calculator covers water-volume charges and the extra fees you enter. For excavation, pool materials, installation and yard work, use the construction guide.
Find the units and rates on your bill
Enter the price per 1,000 US gallons, per CCF or per cubic meter. One cubic meter is 1,000 liters. A CCF is 100 cubic feet; some utilities bill using a rounded conversion such as 748 gallons. Use the conversion printed on your bill in the CCF field.
The water rate starts blank so an unknown rate does not look like free water. A rate you explicitly enter as zero is allowed.
- EPA: understand the units and charges on your water bill · Checked 2026-10-27
A dated water-only example: Portland
Portland lists $8.833 per CCF for July 1, 2026 through June 30, 2027, using 748 gallons per CCF. For 10,000 gallons: 10,000 ÷ 748 × $8.833 = $118.09 in water-volume charges.
This example excludes sewer and fixed charges. To reproduce it, choose CCF, keep 748 gallons per CCF and enter 8.833 as the flat water rate. Use the rate from your own utility for your fill.
- Portland: effective dates, CCF conversion and water rates · Checked 2026-10-27
Calculate the extra cost across water-price tiers
In three-tier mode, enter the existing billing-period use before adding pool water, the first two cumulative tier limits and the price in each tier. The last tier covers all use above the second limit. All quantities and rates use the selected bill unit.
The additional water charge is the bill’s volume charge after filling minus the volume charge before filling. For example, with use of 4 units, 10 more units, boundaries at 5 and 10 units, and prices of $2, $3 and $4 per unit, the added charge is $33: one unit at $2, five at $3 and four at $4.
For two tiers, use any second boundary above the first and enter the same price for the second and third tiers. This tool uses marginal block rates; a utility that reprices all use at the highest reached rate needs a different calculation.
Keep sewer, credits and fixed fees separate
Select a sewer rate only when extra pool water actually increases that charge. Some utilities use a seasonal allowance or approve a pool-fill adjustment. Check the eligibility and approval process with your utility before leaving sewer out.
Add only fees caused by this fill, such as a one-time setup charge. A standing monthly fee you would pay anyway is not an additional pool-filling cost. An unknown quote or rate should stay unknown rather than becoming zero.
Compare a water-delivery quote for the same volume
Enter an all-in quote covering the same water amount, including minimum loads, delivery charges and taxes. The comparison shows that quote minus the added utility bill. A negative difference means the entered delivery total is lower.
Check water quality, hose reach and delivery arrangements before choosing a supplier. The calculator compares the totals you enter; it does not collect local delivery prices.
Common questions
How much does filling a 10,000-gallon pool cost?
At $10 per 1,000 gallons, the water charge is $100. Portland’s dated $8.833/CCF example gives $118.09 using 748 gallons per CCF. Add any applicable sewer and incremental fees from your own bill.
Should I include my monthly service fee?
Include only a fee added because of the fill. A fixed monthly fee you already pay is not an incremental pool cost.
Can I avoid sewer charges for a pool fill?
It depends on your utility’s rules and billing method. Confirm any adjustment or credit before treating the sewer charge as zero.
Sources & calculation notes
Check the original source for product-specific instructions and current details.
- Portland: utility rates, July 2026–June 2027Checked 2026-10-27
- EPA: understanding your water billChecked 2026-10-27
- NIST: SI units of volumeChecked 2026-10-27