Pools are a hard deal to correctly determine. My first suggestion is to go the Building Official in your area and ask for clarification, as this is only my opinion of what the code says. Your Building Official may interpret the code differently or the codes may not be the same in your area. First, the International Building Code places pools and spas in the "Assembly" occupancy where the minimum walking surface dimension is generally 48". The International Residential Code requires only 36" generally for walking surfaces. IMHO... I would require 48" as it is the most restrictive, and if you think about it, most people getting out of a pool would be getting out perpendicular to the edge of the pool and leaning across the walking surface. This requires more room. However, if you made a good argument, and it where residential only, I might be persuaded to let 36" go. Just my humble opinion. Terry P.S. Opinions are usually worth exactly what you pay for them!
Depends on the depth of the pool
How much water in a 48inch 12foot round pool
If you are asking about a 27' circumference pool, then the answer is 27'
If the circumference of the round pool is 29 feet, then the volume of the pool (area times depth) is about 267.7 cubic feet.
50
No, you cannot convert a round pool into an oval pool. The measurements would be off and you would be unable to move the pieces of the round pool to form an oval.
Around two Clorox 182 oz jugs,
I used a sand base for our 20' round above ground pool. It's much easier to deal with after the pool is gone. Greener too.
to calculate the content of the pool go to this link
You should not put any Earth in your 18 foot round 5 foot deep pool. You should only put water and cleaners in the pool.
If the pool is 26 feet around, then its circumference is 26 feet. If the pool is 26 feet across, then its circumference is 81.7 feet.
About 3,758 gallons.