# One light year is equivalent to how long in time?

There are $365 \times 24 \times 60 \times 60 \approx 31.5 \times {10}^{6}$ seconds in one year.
So, one light year will be $299 792 \cdot 31.5 \times {10}^{6} = 9.4 \times {10}^{12} k m$