Convert CCF (hundred cubic feet) to US gallons and back. Many US water utilities bill in CCF, and gallons make that usage easier to picture.
1 CCF = 748.052 gallons = 2.832 m³
Typical monthly household readings fall between about 3 and 15 CCF. Gallons are rounded to 2 decimal places and cubic meters to 3.
| CCF | US Gallons | m³ |
|---|---|---|
| 0.5 | 374.03 | 1.416 |
| 1 | 748.05 | 2.832 |
| 2 | 1,496.1 | 5.663 |
| 3 | 2,244.16 | 8.495 |
| 4 | 2,992.21 | 11.327 |
| 5 | 3,740.26 | 14.158 |
| 6 | 4,488.31 | 16.99 |
| 8 | 5,984.42 | 22.653 |
| 10 | 7,480.52 | 28.317 |
| 12 | 8,976.62 | 33.98 |
| 15 | 11,220.78 | 42.475 |
| 20 | 14,961.04 | 56.634 |
| 25 | 18,701.3 | 70.792 |
| 50 | 37,402.6 | 141.584 |
| 100 | 74,805.19 | 283.168 |
CCF means 100 cubic feet. The first C is the Roman numeral for 100, and "CF" is cubic feet. Some utilities print it as HCF (hundred cubic feet), which is the same unit. Water meters in much of the US register volume in cubic feet, so utilities bill in blocks of 100.
A cubic foot holds exactly 1,728 cubic inches, and a US gallon is defined as exactly 231 cubic inches. That makes one cubic foot 7.48052 gallons, and one CCF:
Some utilities bill in thousands of gallons (kgal) instead of CCF. To compare the two, 1 CCF is about 0.748 kgal, so 1 kgal is about 1.337 CCF.
Multiply by 748.052:
Example: 12 CCF = 12 × 748.052 = 8,976.62 gallons
Divide by 748.052:
Example: 5,000 gallons = 5,000 ÷ 748.052 = 6.68 CCF
Mental math check: multiplying CCF by 750 (or dividing gallons by 750) lands within 0.3% of the exact answer.
The EPA puts the average American family at more than 300 gallons a day at home, so this household is below average. Check whether your bill covers one month or two before comparing, since many utilities bill every other month.
Water rates are usually quoted per CCF, which makes them hard to compare with utilities that charge per 1,000 gallons. Divide the CCF rate by 748.052 for the price per gallon, or by 0.748052 for the price per 1,000 gallons.
| Rate per CCF | Per gallon | Per 1,000 gallons |
|---|---|---|
| $3.00 | $0.0040 | $4.01 |
| $5.00 | $0.0067 | $6.68 |
| $8.00 | $0.0107 | $10.69 |
| $10.00 | $0.0134 | $13.37 |
| $12.00 | $0.0160 | $16.04 |
Many bills also add a fixed monthly service charge and sewer fees based on the same CCF usage, so the effective price per gallon is usually higher than the water rate alone.
Gas utilities also measure in CCF, but converting gas usage to gallons isn't meaningful. Natural gas is billed for the energy it contains, so gas CCF is converted to therms instead. The US Energy Information Administration uses an average of 1 CCF ≈ 1.037 therms. Your utility applies its own heat-content factor, which is printed on the bill and changes slightly from month to month.
Use this converter for water. For gas, multiply CCF by the therm factor on your bill.
748.052 US gallons. The exact value is 172,800 ÷ 231 = 748.051948… gallons, because a CCF is 172,800 cubic inches and a US gallon is 231 cubic inches.
Yes. Both mean 100 cubic feet. "C" is the Roman numeral for 100 and "H" stands for hundred. Utilities choose one or the other.
1,000 gallons is 1.337 CCF. This is useful when comparing a utility that bills per CCF with one that bills per 1,000 gallons (kgal).
No. Bills use Ccf, CCF and ccf interchangeably. Don't confuse it with MCF, which is 1,000 cubic feet and is mostly used for natural gas.
US gallons (231 cubic inches). An imperial gallon is larger (4.546 liters vs 3.785 liters), so 1 CCF is about 622.9 imperial gallons. US water utilities bill in US gallons.
Utilities usually bill only whole hundreds of cubic feet and carry the remainder forward to the next reading. A meter showing 148,250 cubic feet would be billed from 1,482 CCF.
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