米是国际单位制基本长度单位，俗称为米，英文是meter，符号为m。“米”的定义起源于法国。1米定义为：当真空中光速c以m/s为单位表达时选取固定数值299 792 458来定义米。
千米千米又称公里，通常用于衡量两地之间的距离。公里是一个国际标准长度计量单位，符号km，英文是kilometre。
米转千米换算表米 (m)千米 (km)0.1 m0.0001 km0.5 m0.0005 km1 m0.001 km1.5 m0.0015 km2 m0.002 km3 m0.003 km4 m0.004 km5 m0.005 km6 m0.006 km7 m0.007 km8 m0.008 km9 m0.009 km10 m0.01 km11 m0.011 km12 m0.012 km13 m0.013 km14 m0.014 km15 m0.015 km16 m0.016 km17 m0.017 km18 m0.018 km19 m0.019 km20 m0.02 km25 m0.025 km30 m0.03 km35 m0.035 km40 m0.04 km45 m0.045 km50 m0.05 km米 (m)千米 (km)55 m0.055 km60 m0.06 km65 m0.065 km70 m0.07 km75 m0.075 km80 m0.08 km85 m0.085 km90 m0.09 km95 m0.095 km100 m0.1 km150 m0.15 km200 m0.2 km250 m0.25 km300 m0.3 km350 m0.35 km400 m0.4 km450 m0.45 km500 m0.5 km550 m0.55 km600 m0.6 km650 m0.65 km700 m0.7 km750 m0.75 km800 m0.8 km850 m0.85 km900 m0.9 km950 m0.95 km1000 m1 km5000 m5 km