Full name: light year
Plural form: light years
Alternate spelling: lightyear
Category type: length
Scale factor: 9460730472580800
The SI base unit for length is the metre.
1 metre is equal to 1.0570008340246E-16 light years.
Valid units must be of the length type.
You can use this form to select from known units:
A light year, abbreviated ly, is the distance light travels in one year: roughly 9.46 × 1012 kilometres (9.46 petametres, or about 5.88 × 1012 (nearly six trillion) miles). More specifically, a light year is defined as the distance that a photon would travel, in free space and infinitely far away from any gravitational or magnetic fields, in one Julian year (365.25 days of 86400 seconds each).
light years to angstrom
light years to shaku
light years to toise
light years to story
light years to chain [Ramsden, engineer]
light years to didot point
light years to shaftment [ancient]
light years to lieue [France, metric]
light years to milímetro
light years to hat [Cambodia]