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A typical workout for a series competitive swimmer might be between 8000-10000 yards in a 2 hour period, or 320-400 25-yard laps in 2 hours. A beginning obviously will be substantially less.
A standard mile is equal to 5,280 feet or 1,760 yards. Swimmers can quickly determine how many laps are required to cover a mile by dividing the length of the pool into 1,760. For example, a pool that measures 20 yards requires 88 laps, the quotient of 1,760 divided by 20.