If you do this at Sea Level when Air Pressure is the barometric mean pressure with nothing but H2O, yes. Otherwise, not exactly, in ways that require formul

If you do this at Sea Level when Air Pressure is the barometric mean pressure with nothing but H2O, yes. Otherwise, not exactly, in ways that require formulas to quantify. Metrology is the dirtiest of all sciences, it does not grant simplicity. Anyways.. the counter example was the old definition of the Ampere: "the constant current which, if maintained in two straight parallel conductors of infinite length of negligible circular cross section and placed one metre apart in a vacuum, would produce between these conductors a force equal to 2 × 10−7 newton per metre of length." Perfectly unrealizable within this Universe.