How many km is 1 light years?

1 light years = 9,460,730,472,581 km

It is 9,460,730,472,581 km, so saying 9,460,730,472,581 km is fine — rounding is within 0.5%.

And how many light years is 1 km?

1 km = 0 light years

Formula: km = light years × 9,460,730,472,580.8

0.1 light years946,073,047,258km

0.2 light years1,892,146,094,516km

0.3 light years2,838,219,141,774km

0.4 light years3,784,292,189,032km

0.5 light years4,730,365,236,290km

0.6 light years5,676,438,283,548km

0.7 light years6,622,511,330,807km

0.8 light years7,568,584,378,065km

0.9 light years8,514,657,425,323km

1 light years9,460,730,472,581km

1.1 light years10,406,803,519,839km

1.2 light years11,352,876,567,097km

1.3 light years12,298,949,614,355km

1.4 light years13,245,022,661,613km

1.5 light years14,191,095,708,871km

1.6 light years15,137,168,756,129km

1.7 light years16,083,241,803,387km

1.8 light years17,029,314,850,645km

1.9 light years17,975,387,897,904km

2 light years18,921,460,945,162km