Convert Light Years (ly) to Points (pt)

The light year is a unit of length in the Astronomical system of units. It uses the symbol ly.

Often confused with a unit of time as it contains the word "year", it is actually defined by the International Astronomical Union (IAU) as the amount of distance that light travels in a vacuum in one Julian year (365.25 days).

Using the speed of light (299,792,458 m/s or 'c') and the Julian year (as apposed to the Gregorian year which is 365.2425 days), we can equivalate 1 light year as 9,460,730,472,580,800 metres or ≈ 9.46 trillion kilometres.

The point is a unit of length in the field of typography and uses the symbol pt.

On computers (Word, Google Docs, design software and the web) a point is exactly 1/72 of an inch, or about 0.3528 mm. That is the point used for font sizes, so 12 pt text is about 4.2 mm tall. Older printing systems used slightly different points, such as the 0.3515 mm American printer’s point.

It is the smallest unit in the world of typography. There are 12 points in a pica.

In physical printing methods / press systems, the point size is the height of the metal press body on which the font's letters are made. When applied to the digital type space, letters are designed around a theoretical size, an em square which is scaled to the relative point size (when specified of course!).