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

Mho per Meter [mho/m]

Mho per meter (symbol: mho/m) is a unit of electrical conductivity, measuring how easily electric current can pass through a material per meter of length. The term “mho” (which is “ohm” spelled backward) represents the reciprocal of resistance (ohms), and is equivalent to the SI unit siemens (S). Therefore, 1 mho/m = 1 siemens per meter (S/m).

This unit describes a material's ability to conduct electricity over a one-meter length. A higher value of mho/m indicates better conductivity, meaning less electrical resistance. Good conductors like copper or silver have high mho/m values, while insulators like rubber or glass have very low values.

Although "mho" is an older term, it is still used informally in engineering and physics, especially in older documents or among professionals trained before the full adoption of the SI system. Today, the preferred term is siemens per meter (S/m), but both are numerically equivalent.

Understanding mho/m is useful when working with legacy data, analyzing materials' electrical properties, or comparing historical measurements with modern standards. It remains a convenient way to express and understand conductance over distance in both academic and industrial contexts.

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.