1 US gallon = 3.7854118 liters
1 Imperial gallon = 4.54609188 liters


I think it's probably worth mentioning that this website is run and maintained in the United Kingdom. The UK, or Imperial gallon is larger than the US gallon. This website recommends 55 gallons for one Oscar. So remember that 55 UK gallons is larger than 55 US gallons.

sorry but just wanted this topic of the "no reply list"

my freind has bought a new tank recently, it's 2.5'(length)x1.5'(height)x1.5'(side), how much is that in UK gallons?

Keep in mind that it should be slightly more than this, considering that those measurements are usually slightly more than the exact foot/half foot.

but, approximately 40 u.k./imperial gallons - 42 u.s. gallons - 164 liters

So, the difference is small. but, add an inch to each of those measurements, and it is closer to 45/48/188 respectively.

I think mine actually measures 13.5" in width, but it is very common to say a 55 u.s. gallon tank is 4' x 1' x 1.5' ... even though that is just rounded off figures. A tank that size would only be 45 u.s. gallons ... which I know it isn't since I have filled it with 5 gallon buckets

1 u.s. gallon equals approximately 0.83 u.k./imperial gallons.

oh my god, the tank is huge if it is 55 uk gallons!
i can only own a tank with 115 x 45 x 45...not enough for 55 gallons...

your tank works out to be around 50 UK gallons