It could fit, but I doubt it would be healthy for the turtle.
If it is an aquatic turtle,( ex: red slider) you need to have 1 gallon of water per shell inch of your turtle. So if your turtle has a 4 inch shell; you would need a 10 gallon tank with 4 gallons of water in it.
A 5 inch sized turtle is too big for a gallon sized tank. They need more room to swim and the filtration needs more water than that for a turtle that size. I have a 5 inch male red eared slider in a 29 gallon aquarium and I consider that to be the smallest tank I would recommend.
First of all, a 10 gallon tank is too small for a turtle, let alone a turtle AND a frog! The proper rule of thumb for aquatic turtles is 10 gallons for every inch of turtle... if you have a 4 inch long turtle, you need at least 40 gallons of water. And second of all, putting a frog with a slider of any age will mean a fed turtle. The turtle WILL eat the frog. Don't try it.
The gallon (volume) and the inch (length) can not be equated.
for a 5 inch or smaller,i would say a 20 gallon and for 1 foots,100 gallon or bigger. the more it grows,the bigger the tank.
Only one, and sometimes a ten gallon tank isn't enough room. The tank should be 4-5 times the turtle length wise and 3-4 times the turtle in width. If you have more then one, each turtle should get that amount of space. The water should be 1.5 times deep for instance a 7 inch turtle would have water 10 inches deep.
A 150-gallon drum contains 0.0036 gallon per cubic inch.
7 inch
A common good rule of thumb for figuring out how much water a turtle needs is to measure its shell from head to tail. A turtle needs five gallons of water for every inch long that it is. So only a hatch-ling can be kept in a 5 gallon tank.
Well you have to have a UV Light, a Turtle Dock, a Filter, a Heater, and at the least a 10 gallon tank. You need 1 gallon per inch of turtle. I have two baby painted turtles and they eat "Baby Shrimp and Krill" and eat alot each day. You should get some plants and gravel to put in the tank too. Turtles love to swim, so in the summer you can build a little pond and let the turtle live there until late autumn. You need to leave the UV light on at least 6 hours a day.
To calculate that, we would have to know (1) -the area of the container (2) the medium.- ie, an inch of concrete would be a litle heavier than an inch of tiny marshmallows
A gallon is a measure of volume, the inch is a measure of length, the two can not be equated. However the cubic inch and the gallon can be equated, there are 231.00010000000003 cubic inches in one US Gallon.