This table of data was copied from the Irvine Ranch Water District
| 1 cubic foot | = | 7.48 gallons | = | 62.4 pounds |
| 100 cubic feet | = | 1 ccf (std. bill unit) | = | 748 gallons |
| 1 acre-foot* | = | 43,560 cubic feet | = | 325,900 gallons |
| 1 cubic foot per second (cfs) | = | 450 gallons per minute | ||
| 1 cfs | = | 646,320 gallons per day | ||
| 1 cfs for 24 hours | = | 1.983 acre-feet | ||
| 1 cfs for 30 days | = | 59.5 acre-feet | ||
| 1 cfs for one year | = | 724 acre-feet | ||
| 1 million gallons | = | 3.07 acre feet | ||
| 1 million gallons per day (mgd) | = | 1,120 acre feet per year | ||
| 1000 gallons per minute | = | 2.23 cfs | ||
| 1000 gallons per minute | = | 4.42 acre-feet per day | ||
| Metric equivalents | ||||
| 15 million gallons per day (mgd) | = | 56.775 megaliters pr day (ML/day) | ||
| 1 acre | = | .004 square kilometers (km) | ||
| 78,000 acres | = | 312 square kilometers (km) | ||
| 120 square miles | = | 193.08 square kilometers | ||
| 1 acre foot | = | 1.233 million liters | = | 1.233 megaliters |
| 1 ccf (one hundred cubic feet) or 748 gallons | = | 2832 liters | = | 2.832 cubic meters |
| 250 miles | = | 402.25 kilometers | ||
| 450 miles | = | 724.05 kilometers | ||
| At IRWD’s rate of 64 cents per ccf, $1 will buy 1168.75 gallons of water | = | 4423 liters or 4.424 cubic meters of water for $1 US | ||
| 1 gallon per minute (gmp) | = | 3.78 liters per minute | ||
| 1 pound per square inch (psi) | = | 0.07031 kg/sq. cm |