# Siemens Converters

> Convert siemens to and from millisiemens, microsiemens, mhos, kilosiemens, megasiemens, and other conductance units

**Category:** Conversion
**Keywords:** siemens, S, mho, conductance, millisiemens, microsiemens, electrical, convert
**URL:** https://complete.tools/siemens-converters

## How it calculates

The converter uses siemens as the base unit. The key relationships follow standard SI prefixes: 1 S = 1,000 mS = 1,000,000 μS = 10^9 nS = 0.001 kS = 10^-6 MS. The siemens is numerically equal to the mho (1 S = 1 mho). The CGS unit abmho equals 10^9 siemens. All conversions multiply or divide by powers of 10, ensuring exact mathematical results.

## Who should use this

- **Water quality analysts** converting conductivity readings between μS/cm and mS/cm
- **Electrical engineers** specifying component conductance in circuit designs
- **Geologists** interpreting ground conductivity survey data in different units
- **Chemistry students** converting electrochemical conductance measurements

## Worked examples

Example 1: A water sample measures 450 μS/cm conductivity. In millisiemens: 450 / 1,000 = 0.45 mS/cm. Example 2: A transistor has 50 mS transconductance. In siemens: 50 / 1,000 = 0.05 S. Example 3: Converting 2.5 S to microsiemens: 2.5 × 1,000,000 = 2,500,000 μS. Example 4: An old datasheet lists 0.02 mhos. In siemens: 0.02 S (identical numerically).

## Limitations

This tool converts between conductance units only and does not calculate conductance from resistance or vice versa (though the relationship is simply reciprocal: G = 1/R). The conversions are mathematically exact. The tool does not account for frequency-dependent conductance (admittance) in AC circuits.

## FAQs

**Q:** What is the difference between siemens and mhos?


**A:** They are numerically identical. The siemens is the modern SI name adopted in 1971, while the mho (ohm spelled backwards) is the older name still used in some industries. 1 siemens = 1 mho.


**Q:** How is conductance related to resistance?


**A:** Conductance is the reciprocal of resistance. If a component has 10 ohms of resistance, its conductance is 1/10 = 0.1 siemens. Higher conductance means lower resistance and easier current flow.


**Q:** Why are microsiemens commonly used for water quality?


**A:** Pure water has very low conductivity (about 0.055 μS/cm), while tap water ranges from 50-800 μS/cm. The microsiemens scale provides convenient numbers for these measurements without requiring decimals.


**Q:** Is the plural of siemens also siemens?


**A:** Yes, the unit name does not change in plural form. It is always "siemens" whether referring to one siemens or many siemens, similar to other units named after people.

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*Generated from [complete.tools/siemens-converters](https://complete.tools/siemens-converters)*