1 ly (light-year) is equal to 5,108,385,784,330.927 nmi (nautical mile). To convert from light-year to nautical mile, multiply by 5,108,385,784,330.927 or divide by 0.0000000000001957565544613572.
Five Trillion One Hundred Eight Billion Three Hundred Eighty-Five Million Seven Hundred Eighty-Four Thousand Three Hundred Thirty Point Nine Two Seven Nautical Mile