Why 1650 is not 1750?

I have debated this with many people and have done numerous calculations to find no answer. If someone knows, please enlighten me. You are correct in saying swimming a "mile" is 1650 yards = .9375 miles while 1750 yards = .9943 miles A "mile" is also considered 1500 meters 1500 meters = .9320 miles while 1600 meters = .9941 miles How about nautical miles 1650 yards = .8146 nautical miles (hmm that doesn't make sense either) I guess we can only say that units of measurements are defined by the arbitrary values we give them (I sound like a philosopher now). Perhaps at one time a "mile" was equal to something different than what we now consider 5280ft. The only thing that does make a little bit of sense is 1650 yards = 1509 meters so the two "miles" are pretty close in length in imperial and metric units. Perhaps .93 of a mile is close enough to consider it a mile.

I have debated this with many people and have done numerous calculations to find no answer. If someone knows, please enlighten me. You are correct in saying swimming a "mile" is 1650 yards = .9375 miles while 1750 yards = .9943 miles A "mile" is also considered 1500 meters 1500 meters = .9320 miles while 1600 meters = .9941 miles How about nautical miles 1650 yards = .8146 nautical miles (hmm that doesn't make sense either) I guess we can only say that units of measurements are defined by the arbitrary values we give them (I sound like a philosopher now). Perhaps at one time a "mile" was equal to something different than what we now consider 5280ft. The only thing that does make a little bit of sense is 1650 yards = 1509 meters so the two "miles" are pretty close in length in imperial and metric units. Perhaps .93 of a mile is close enough to consider it a mile.