497 km = 308.8 miles
600km
There are 1000millimetres in a metre. Therefore you divide mm by 1000 to get metres. 497/1000 is 0.497 metres.
1 mm= 1/1000 km
10000 mm = 0.01 km
0.25 km = 250,000 mm
497 million miles, approx.
To convert from mm to km, divide by a million.
25.6 kilometers (mm / 1,000,000 = km)
4.3 mm is equal to 0.0000043 km
8490 mm = 0.00849 km
1,000,000 mm = 1 km