How Many Ounces in a Gallon

How Many Ounces in a Gallon

Many way wonder upon the question “how many ounces in a gallon” often. An ounce is known to have several different meanings. While can be used to measure weight by some, others may use it to measure volume of liquid. For example, if you want to know how many ounces in a gallon for water, at 70 degrees Fahrenheit temperature, a gallon may come out equivalent to 133.28 ounces or 8.33 pounds. The density though may vary with change in the temperature. Water when heated to the boiling point can weigh exactly 128 ounces or 8 pounds. This equation can be used to measure ounces in gallon, and even gallon to ounces, etc.

Gallon today represents the units of measurement of liquids in the U.S. which has replaced the ‘liter’ units in the metric system. It is usually abbreviated as ‘gal’ and is often used for measuring the fuel efficiency. For fluid ounces (in the U.S.) the abbreviation is ‘fl oz’.

It may be noted here that fluid ounces specifically apply to liquids, while weight measured in ounces apply specifically to dry materials. There can be other units of measuring too, which can include a quart or a cup. You may often come across people who may ask “how many cups in a gallon”, or “how many quarts in a gallon”. While a cup can measure as equivalent to 4 ounces, a quart can be measured as equivalent to 4 cups, or 32 fluid ounces. Another unit for comparing ounces is in milliliters. While 25.36 fluid ounces equal 50 milliliters (ml), 1 ounce comes as equal to 29.57ml. 1 ml on the other hand is equal to 0.03 ounces approximately.

The variation in ounces to gallons or gallons to ounces values is also there in the US and UK measurement. While 1 gallon measures as 128 ounces in the U.S., it can measure as much as 160 ounces in U.K measurement. The U.K measurement system here is also referred as the Imperial measurement system by many.

How Many Ounces in a Gallon?

Britain and Australia, then we will show them in the table.

Ounces United States Australia United Kingdom
1 30ml 30 ml 28 ml
2 60ml 60 ml 57 ml
3 90 ml 100 ml 85 ml
4 120 ml 125 ml 114 ml
5 150 ml 150 ml 142 ml
6 180 ml 190 ml 170 ml
7 210 ml 220 ml 200 ml
8 240 ml (1 cup) 250 ml 227 ml
9 270 ml 275 ml 256 ml
10 300 ml 300 ml 284 ml
16 480 ml (1 pint) 500 ml (≈ 1 pint) 455 ml
20 600 ml 600 ml 568 ml (1 анг. pint)
32 950 ml (1 quart) 1000 ml (1 quart) 909 ml
128 3780 ml (1 gallon) 3840 ml 3637 ml

Reassign to the United States more precisely ounce of integers.

Ounces USA
1 30 ml
2 59 ml
3 89 ml
4 118 ml
5 148 ml
6 177 ml
7 207 ml
8 237 ml
9 266 ml
10 296 ml
16 473 ml
20 591 ml
32 946 ml
128 3785 ml


Calculators for all the aforesaid measurements are readily available over the internet. You can use those to easily convert these units as per your convenience. Do remember to check which zone’s measurement system your region follows before making the calculation. You can also use certain platforms to seek answers for your specific query about the measurement system which you feel has not been listed above.

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