Convert picosiemens/meter [pS/m] to mho/centimeter [mho/cm] Online | Free electric-conductivity Converter

Picosiemens per Meter [pS/m]

Picosiemens per meter (symbol: pS/m) is a unit of electrical conductivity in the International System of Units (SI). It represents one trillionth of a siemens per meter, or

This extremely small unit is used to measure very low conductivity, typically found in highly resistive or nearly insulating materials, such as ultrapure water, gases, plastics, or ceramics. In these cases, standard units like S/m or mS/m are too large to accurately represent such low conductance values.

Electrical conductivity in pS/m is important in fields such as semiconductor research, nanotechnology, material science, and water purification, where even trace amounts of ionic contamination or charge carriers significantly affect performance.

For example, ultrapure deionized water has a conductivity around 5.5 pS/m, indicating extremely low levels of dissolved ions. This is crucial in industries like pharmaceuticals, microelectronics, and nuclear power, where purity is essential.

Using pS/m allows scientists and engineers to quantify and compare extremely low levels of conductivity with precision, supporting the design and evaluation of high-resistance materials and ultra-sensitive systems.

Mho per Centimeter [mho/cm]

Mho per centimeter (symbol: mho/cm) is a non-SI unit used to measure electrical conductivity, indicating how easily electric current flows through a material per centimeter of length. The term “mho” (which is “ohm” spelled backward) represents the reciprocal of electrical resistance, and is equivalent to the modern siemens (S). Therefore, 1 mho/cm = 1 siemens per centimeter (S/cm).

This unit is often used in electrochemistry, water quality testing, and older scientific literature to describe the conductivity of liquids such as saltwater or electrolyte solutions. Materials with high conductivity (high mho/cm) allow electric current to pass through them easily, while those with low values are poor conductors.

In SI units, electrical conductivity is measured in siemens per meter (S/m). To convert:

Although "mho" has been officially replaced by "siemens", it is still informally used, especially among engineers and in legacy systems. Understanding mho/cm is important when dealing with older data, laboratory instruments, or specific scientific fields where this unit remains in use.