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random asked:


Im talking about like the town swimming pool or an olympic size 50m by 25m. How many gallons of water for a minute with the pump? Any answers will be good. I am writing a math problem. Thanks.
2 m deep. I jsut want to know how fast the pumps they use are. If it pump is 10 gallons a minute…it’ll take 46 days.

3 Responses to “How long does it take to fill a swimming pool?”

1. yousedummy Says:
   March 27th, 2009 at 4:35 am

   Christena

   You have to supply the depth of the pool, too, so the pool’s volume can be calculated.

2. Rhyno Says:
   March 28th, 2009 at 8:42 pm

   Lessie

   We used a garden hose to fill ours, it took a few days with us turning the hose off at night. Probably about 3-4 gallons a minute.

3. gugliamo00 Says:
   March 31st, 2009 at 4:22 pm

   Kristine

   Well, I’m kind of guessing. Pools are rectangular from above, but not from the side.

   Here’s how you get the exact volume in cubic meters… don’t worry, I’ll get to gallons in a little bit.

   Get the minimum depth at the shallow end. Usually there will be a constant drop for about half the pool until the “deep end. {Measure the distance from the shallow end to that drop-off. }{Add the depth at the start of the drop-off to the dept of the shallow end, divide by 2 and then multiply that result by the distance between the shallow end and the drop-off. Write that number down somewhere.

   Now the deep end of most pools isn’t a steady drop-off either, but because I’m lazy, and because a few gallons either way isn’t going to make any difference. Add the maximum depth of the shallow end, you already have that to the deepest depth of the pool. Divide that sum by 2. Multiply that result by the distance from the end of the “shallow” end to the end of the “deep end.” Multiply that value by 25. Write that number down along with the results from the shallow end. Add those two values together. Multiply that answer by 25. That’s the volume of the pool in cubic meters.

   Now, there are 264.2 gallons in each cubic meter. So multiply that rather large number you already have by 264.2. That’ll be the number of gallons.

   Formula.
   Take the depth at each end of the pool, and at each point of the pool where the slope of the bottom changes. Call them D(1) D(2), D(3), D4, etc., for however many time the slope of the bottom changes. D(1) will be the depth at the shallow end, and the last depth, in this case D(4), will be the depth at the other end of the pool. Convert your measurements into meters. A foot is roughly .3048 meters.

   Measure the distance (in meters) from the shallow end where the depth is D(1) to the first change in slope, where the depth is D(2).Call that distance L(1)

   Measure the distance from where the depth is D(2) to where the next change in slope, where the depth is D(3). Call that distance L(2),

   Continue the process until you reach the deep end of the pool..In this case you would label the last length L(3)

   Ok, Add D(1)+D(2). Divide by 2 and multiply by L(1)
   {[D(1)+D(2)]/2} x L(1) Write this number down
   Do the same thing for each of the other sets of data…
   {[D(2)+D(3)]/2} x L(2)
   {[D(3)+D(4)]/2} x L(3)

   Now add the three numbers together. Multiply the sum by 625. That’s the number of cubic meters of water ar in your pool.

   Multiply that product by 264.2 to get the number of gallons.
   ——————

   Here’s my guess.

   I’m presuming your pool is a competitive swimming pool and is not equipped with diving boards. Therefore, the maximum depth is probably about 8 feet.
   Let/s say the minimum depth is 3½ feet (1.06m) and 25 meters down the pool it slopes more at a different rate into the deep end, but where the slope starts it’s 6 feet deep (1.82m). From there it drops off to a depth of 8 feet (2.4m)

   Ok the max and min depth of the shallow end are 1.06 and 1.82m. Add those together and get 2.88. Divide by 2 and you get 1.44. Multiply that by 25 (the length of the shallow end) and you get about 36.

   Same thing with the deep end… minimum depth (1.82) plus the maximum depth (2.41) is 4.23. Divide that by 2 and you (rounded) 2.12. Multiply that by 25 and you get about 53.

   Add 36 and 53 and you get 89. Multiply that by 25, and you get 2,225. That’s how many square meters of water are in the pool.

   Now multiply that by 264.2, the number of gallons in each of those square meters, and you get 587,845 gallons of water in the pool.

   This is just an approximation based upon my guesses of the depths of your pool. But you can almost be certain that there’s at least half a million gallons of water needed to fill the thing. If you plan to use a garden hose that fills a gallon bucket in 20 seconds, you’re talking about a third of a year to fill the thing. Fortunately, pool pumps have a much larger volume–you said 10 gallons per minute, by my guess you’re talking about two months. But you estimated 45 days. Either my guesses as to the depth were a little high, or you’re pumping more than 10 gal/min. The people who installed the pool equipment will be better able to tell you how long it will take.

   Get ready for a rather large water bill.And, if the pumps haven’t started yet, the pool’s probably not going to open until late in July.