622 meters is 0.38 of a mile. Lots of people round this off to half a mile, which is not really accurate. Half a mile is just between 804 meter and 805 meter, depending on accuracy. 805 meters is 0.50020381 miles.
Google has a nice unit conversion, for example type "805meter to miles" and it will give
you the answer.
1850 square meters is about 0.457 acres.
There are exactly 19,913.2342 square feet in 1850 square meters.
171.870624
250 meters = 0.155 miles.
3 miles = 4,828 meters
1000 meters = 0.6214 miles.
50 meters=0.0310685596 miles
1375 meters = 0.854385389 miles.
1.4 miles = 2,253.08 meters
2.0 miles = 3,218.7 meters
0.03 miles = 48.3 meters.
16 meters is 0.00994194 miles.