Conversion factors


Distance conversion

1 light year = 9.46 x 10^15 m = 6 x 10^12 miles

1 A.U. = 1.5 x 10^11 m = 9.3 x 10^7 miles

1 parsec = 3.26 light years

1 mile = 1.609 km = 1609 m


Time conversion

1 year = 365 days = 3.156 x 10^7 seconds

1 day = 86,400 seconds

1 hour = 3,600 seconds


prefixes in scientific units

m = milli = 0.001. 3 mm = 0.003 m

c = centi = 0.01. 60 cm = 0.6 m

k = kilo = 1000. 5.6 km = 5600 m

M = mega = 1,000,000. 45 Mlyr = 45,000,000 lyr