Printable reference · system comparison
The same unit names can represent different volumes. This chart keeps the US and Imperial definitions visibly separate.
An Imperial gallon and pint are larger than their US counterparts, while an Imperial fluid ounce is slightly smaller than a US fluid ounce. Counts inside each gallon also differ.
| Unit name | US value | Imperial value | Difference |
|---|---|---|---|
| 1 gallon | 3,785.411784 mL | 4,546.09 mL | 760.678216 mL |
| 1 pint | 473.176473 mL | 568.26125 mL | 95.084777 mL |
| 1 fluid ounce | 29.5735295625 mL | 28.4130625 mL | -1.160467063 mL |
| Fluid ounces per gallon | 128 US fl oz | 160 Imp fl oz | Different counts and sizes |
Remember: Write the system into the unit label throughout the calculation: US gal, Imp gal, US fl oz, or Imp fl oz.
Values derive from GallonMan’s canonical dataset, verified 2026-09-01. US liquid, Imperial, and metric labels are intentionally explicit.
Five gallons could mean 18.92705892 L in the US system or 22.73045 L in the Imperial system—a difference of more than 3.8 liters.
Try a custom amount: use the liquid volume converter when your value is not in the table.