1 Gallon Equals How Many Ounces?


29 Answers

Frances Bott Profile
Frances Bott answered
It depends on where you are in the world as to what the correct answer is. If you are in the US, 1 Gallon is equal to 128 fluid ounces. But in the UK 1 Gallon is equal to 160 fluid ounces. There are many ways to find out these answers, the internet being the quickest and most reliable source. There are plenty of conversion charts on the web which are extremely easy to use, but be careful to choose the correct country as the US differs slightly from other countries. For example, the US fluid ounce is about 4 per cent larger than the UK fluid ounce, hence the answer to this question differs. If you cannot get to a laptop or computer then an encyclopaedia or a library would give you the answers. Gallons, quarts, pints and fluid ounces are all the old Imperial system of fluid measurement. This system was used for centuries in Britain, the Commonwealth and the USA. A new system was founded in France in the 18th Century. Before scales were invented people used to measure in cups and spoonfuls. Some old cook books will still use cups and spoonfuls for recipes especially in the US. For example, 1 cup = 8 fluid ounces or 16 tablespoons, which in Metric is 237 millilitres.

When Metric came into force some folk found it extremely difficult to adjust even though children have been taught in schools since the 70's, but old habits die hard and people continued to use the Imperial measurements and still do to this day. You can still find Imperial measurement in supermarkets usually showing the Metric weight with the Imperial weight in brackets. Most people in the UK and the US still use pounds and ounces and feet and inches.

Here are a few websites that will help you convert Imperial to Metric.
Suhail Ajmal Profile
Suhail Ajmal answered
There are 8 oz in a cup and 2 cups in a pint and 2 pints in a quart and
4 quarts in a gallon so there are 128 oz in a gallon.

You can also say it another way, like, 128 ounces is 16 cups which is 8 pints which is 4 quarts which is 1 gallon.
Mike J Profile
Mike J answered
1 gallon is equal to:

  • 4 quarts.
  • 8 pints.
  • 16 cups.
Anonymous Profile
Anonymous answered
128 fl oz
Stuti Ahuja Profile
Stuti Ahuja answered
One US gallon is equal to 128 ounces In the British system, a gallon of water weighs 10lbs or 160 ounces, so there are 160 fluid ounces in a gallon, and 20 fluid ounces in a pint. From this we know that a fluid ounce of water does actually weigh an ounce.
Thus, an American fluid ounce is bigger than the British fluid ounce by almost about 4%. And an American fluid ounce of water doesn't weight an ounce.
So, the result is that the US gallon is 83.267% of the British gallon. In other terms, we can say that the British gallon is about a 5th greater than the US gallon, and the US gallon is about 5/6 of the British gallon or a little less then 7 British pints.
John Profile
John answered
16 ounces to a pint , 2 pints to a quart ,4 quarts to a gallon . 2 pints x 16 ounces =32 ounces or 1 quart. 32 ounces(1quart) x 4 quarts =128 ounces or 1 gallon.
Aisha Profile
Aisha answered
There are 128 Ounces in One US gallon of water. You can use this factor for any kind of such conversions.
Chips Ters Profile
Chips Ters answered

Hi, I recently needed to calculate how many ounces in a gallon. If you're wondering how many ounces of water to drink per day, it depends on several factors, including your intensity of activity, climate, health, and gender.

Pat Merrifield Profile
Pat Merrifield answered
A pint's a pound the world around is a good little ditty to remember to come up with an answer to the question. 16 ounces in a pound, 8 pints in a gallon equals 128 ounces.
Anonymous Profile
Anonymous answered
If I have a solution that says 1oz(2 tablespoons)of solution per gallon of clean water how much solution to water ratio for a 32oz spray bottle

Answer Question