If the pool is 15 feet long and 4 feet wide, that would be 60 sq. feet of area. Now you would need to know the depth. Multiply 60feet by the depth and then multiply by 7.48 gal. per sq. feet for the total capacity. Is the pool round by any chance?
how many gallons of water does a swimming pool 15 feet by 4 feet deep hold
6015.77 gallons
1795 gallons, if you fill it to the brim.
It is 30.6 cubic feet = 190.3 Imperial gallons.
'bout 1500 to 2000
You need to provide information on the area of the pool as well.
A round swimming pool 12 feet across by 4 feet deep will hold 452 ft3 which converts to 3,381 gallons
My swimming pool holds 1250 gallons. It is 12 feet diameter and 3 feet deep.
If the pond is uniformly 6-feet deep it would contain about 1,955,109 gallons of water.
There are 13,536 gallons in a 24 foot diameter pool that has 4 feet of water. Not true for a pool that is 4 feet in height. This would hold less than 4 feet of water.
250 gallons wont even get the bottom of one of them wet
Go to http://www.havuz.org/pool-calculators.htm