US gallon per day
The US gallon per day is the customary unit for water demand, well yield, septic system sizing and small treatment plant capacity in North America. It equals about 4.3813e-8 cubic metres per second; the ratio is exact as a fraction, since the US gallon and the day are both exactly defined, but the decimal shown here repeats and so is rounded. Residential water use is often planned at 50 to 100 gpd per person.
Why it is written : Lower case, like the rest of its family — gpm, gph and gpg are all written the same way, because they are read as abbreviations rather than spelled out letter by letter. Its own million-fold multiple breaks the pattern and is written MGD in capitals, which surprises people who meet the two side by side.
Watch out: As with gallons per minute, the US gallon and the imperial gallon differ by about 20 percent. Older Canadian and British figures for gallons per day may be imperial.
| 1 | 0.0026287582 |
One us gallon per day in every volumetric flow rate unit
| 3.78541 | liter per day (L/d) | |
| 2.62876 | cubic centimeter per minute (cm³/min) | |
| 2.62876 | milliliter per minute (mL/min) | |
| 1 | US gallon per day (gpd)this unit | |
| 0.160417 | cubic inch per minute (in³/min) | |
| 0.157725 | liter per hour (L/h) | |
| 0.0438126 | milliliter per second (mL/s) | |
| 0.0416667 | US gallon per hour (gph) | |
| 0.0238095 | barrel per day (bbl/d) | |
| 0.00557002 | cubic foot per hour (cfh) | |
| 0.00378541 | cubic meter per day (m³/d) | |
| 0.00262876 | liter per minute (L/min) | convert → |
| 0.000694444 | US gallon per minute (gpm) | convert → |
| 0.000578246 | imperial gallon per minute (imp gpm) | |
| 0.000157725 | cubic meter per hour (m³/h) | convert → |
| 0.0000928337 | cubic foot per minute (cfm) | convert → |
| 0.0000438126 | liter per second (L/s) | convert → |
| 0.00000306888 | acre-foot per day (ac·ft/d) | |
| 0.00000262876 | cubic meter per minute (m³/min) | |
| 0.00000154723 | cubic foot per second (cfs) | |
| 0.000001 | million US gallons per day (MGD) | convert → |
| 8.32674e-07 | million imperial gallons per day (MIGD) | |
| 4.38126e-08 | cubic meter per second (m³/s) | convert → |