Unit Conversions and Useful Constants

January 12, 2012 in Uncategorized | No comments

Unit Conversions and Useful Constants

This page contains several useful conversion factors and constants.  In addition, at the end of this page is a short tutorial on how to perform unit conversions.

Conversion Factors

Distance

1 kilometer (km) = 0.6214 miles

1 Astronomical Unit (AU) = 149.6 X 106 km

1 light year (ly) = 9.461 X 1012 km

1 parsec (pc) = 3.262 ly

Angles

360° = 2pi radians

Temperature

K = °C + 273

°C = 0.555 X (°F – 32)

°F = (1.8 X °C) + 32

Useful Constants

Speed of Light 3 X 108 m/s
Hubble Constant (best current estimate) 70 km/s per megaparsec

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