How many km is 1,000 light years?

1,000 light years = 9,460,730,472,580,800 km

It is 9,460,730,472,580,800 km, so saying 9,460,730,472,580,800 km is fine — rounding is within 0.5%.

And how many light years is 1,000 km?

1,000 km = 0 light years

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

100 light years946,073,047,258,080km

200 light years1,892,146,094,516,160km

300 light years2,838,219,141,774,240km

400 light years3,784,292,189,032,321km

500 light years4,730,365,236,290,400km

600 light years5,676,438,283,548,480km

700 light years6,622,511,330,806,561km

800 light years7,568,584,378,064,641km

900 light years8,514,657,425,322,721km

1,000 light years9,460,730,472,580,800km

1,100 light years10,406,803,519,838,880km

1,200 light years11,352,876,567,096,960km

1,300 light years12,298,949,614,355,042km

1,400 light years13,245,022,661,613,122km

1,500 light years14,191,095,708,871,202km

1,600 light years15,137,168,756,129,282km

1,700 light years16,083,241,803,387,362km

1,800 light years17,029,314,850,645,442km

1,900 light years17,975,387,897,903,522km

2,000 light years18,921,460,945,161,600km