1 ly (light-year) is equal to 9,460,730,472,580.938 km (kilometer). To convert from light-year to kilometer, multiply by 9,460,730,472,580.94 or divide by 0.00000000000010570008340246.
Nine Trillion Four Hundred Sixty Billion Seven Hundred Thirty Million Four Hundred Seventy-Two Thousand Five Hundred Eighty Point Nine Three Eight Kilometer