Impossible to answer without more information ! The heigh can be any number relative to the diameter.
There's no telling w/o knowing the shape and dimensions of the tank. If it's a real high and narrow tank, not a lot. If it's a real low and wide tank, can be quite a lot.
A 44-inch diameter 500 cubic Imperial gallon cylindrical tank is 47.4 feet long.
It's a 5.6 gallon tank.
222
Would need overall height or id to get answer
2
115502.6 cubic inches
~ 500 gals
If by "size," you mean the dimensions, then you'll need to provide more information. A 500 gallon tank can be tall and narrow or short and wide...or anything in between. If you can provide at least one dimension, then the formula for volume (area X height) can be applied to give you the other dimension. The above only calculates the cubic units of the tank. Keep in mind that you then need to factor in how many cubic inches a gallon of water takes up. 1 Gallon of Water = 231 cubic inches. Your final formula will be Gallons in tank = L"xW"xH"/231 You can now play with your numbers for L, W, & H until you get a combination that meets your goal of 500 gallons. For example, let's see if a tank that is 4'x6'x3' will work. It's easiest if you convert the feet into inches first. This gives us: 48"x72"x36"= 124,416 cubic inches. Now, divide this by the number of cubic inches in a gallon: 124,416/231 = 538.6 gallons.
There is not enough information to answer. What is the shape of the tank? How cold is it? How efficient is the heating system? How large a space are you heating?
A tank that size would better benefit from a few smaller heaters rather than one large one for a more even temperature. 500 gallons you would need roughly 2500 watts total.
According to a local dealer ad, the 2007 Taurus (only sold as fleet vehicle - not the '500' renamed Taurus in 2008) has an 18 gallon tank.