毫米汞柱（英语：Millimeter of mercury）是一种压强单位，等于一毫米高的水银柱对液柱底面产生的压强。一毫米汞柱为133.322387415帕斯卡，约为1托。符号为mmHg。
英语百科
Millimeter of mercury 毫米汞柱
（重定向自Mm Hg）
A millimeter of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high and now defined as precisely 7002133322387415000♠133.322387415 pascals. It is denoted by the symbol "mmHg".