To convert km to ly enter the value in the field below and select the target unit, the value will be displayed below:
| Metric | |
|---|---|
| Kilometer (km) | |
| Meter (m) | |
| Decimeter (dm) | |
| Centimeter (cm) | |
| Millimeter (mm) | |
| Micrometer (µm) | |
| Nanometer (nm) | |
| Angstrom (Å) | |
| Astronomical | |
|---|---|
| Parsec (pc) | |
| Light-year | |
| Astronomical unit (AU) | |
| Light-minute | |
| Light-second | |
| British/American | |
|---|---|
| League | |
| Mile (mi) | |
| Furlong | Chain |
| Rod (rd) | |
| Yard (yd) | |
| Foot (ft) | |
| Link | |
| Hand | |
| Inch (in) | |
| Line | |
| Thousandth (mil) | |
| Thou (thou) | |
| Nautical | |
|---|---|
| Nautical mile | |
| Fathom | |
The formulas for conversion are represented below:
ly = km / 9,461x1012
Example: 1000 kilometers in Light Year:
ly = km / 9,461x1012
ly = 1000 / 9,461x1012
ly = 1,057x10-10
km = ly * 9,461x1012
Example: 3 Light Years in kilometers:
km = ly * 9,461x1012
km = 3 * 9,461x1012
km = 2,838x1013
Considering that 1 kilometer is equivalent to 1.057000834x10-13 light-years, you can use a rule of three to obtain that 1000000 km equals 1.057000834x10- 7 light years.
1 km - 1,057000834x10-13ly
1000000 km - x
Apply the rule of three and get:
x km = 1,057000834x10-7 kmly
x = 1,057000834x10-7 ly
If every 9,461x1012 kilometer we have 1 light year, just multiply the number of light years (100) by 9,461x1012, so you will get that 100 light years equals 9,461x1014 km. Observe the calculation below:
km = ly * 9,461x1012
Km = 100 * 9,461x1012
km = 9,461x1014