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Electric Conductance Converter

Science

Convert electric conductance between siemens, millisiemens, microsiemens, and the legacy mho unit instantly — used for circuit and sensor design.

Reviewed by the thecalcu.com team · Last updated July 20, 2026

From
To
All conversionsfor 1 Millisiemens (mS)
Kilosiemens (kS)0.000001
Siemens (S)0.001
Millisiemens (mS)1
Microsiemens (µS)1000
Mho (legacy name for Siemens)0.001

What is a Electric Conductance?

The Electric Conductance Converter converts electric conductance between siemens (the modern SI unit), kilosiemens, millisiemens, microsiemens, and the legacy mho (numerically identical to siemens). Conductance measures how easily current flows through a component or circuit, the mathematical reciprocal of resistance, and a quantity that simplifies parallel circuit calculations.

Enter a value in any supported unit and the converter calculates the equivalent instantly. For the reciprocal quantity, see the Electric Resistance Converter.

Why Use an Electric Conductance Converter?

Sensor and instrumentation specifications, particularly for water quality and biological measurements, commonly report conductance in microsiemens given the small values typically involved, while circuit analysis references use the base siemens unit, and some older documentation still uses the legacy mho name. Comparing or combining these requires accurate conversion.

Who Should Use This Converter?

  • Electronics and circuit design engineers working with conductance values for parallel circuit analysis.
  • Water quality and instrumentation engineers converting conductivity sensor readings reported in microsiemens.
  • Electrical engineering students learning to work with conductance as an alternative to resistance in circuit calculations.
  • Anyone reviewing older technical documentation that uses the legacy mho unit name.

What Insights Does the Electric Conductance Converter Give You?

The main output is the converted value in your chosen target unit, calculated precisely from the fixed multiplier relationship between units. Since mho and siemens are numerically identical, converting between them requires no scaling at all, this converter is most useful for moving between the kilo/milli/micro scale prefixes.

How to use this Electric Conductance calculator

  1. Choose your starting unit from the source dropdown, for example, "Millisiemens (mS)".
  2. Enter the numeric value you want to convert in the input field.
  3. Choose your target unit from the destination dropdown, for example, "Siemens (S)".
  4. Read the converted result, which updates instantly as you type or change units.
  5. Use the swap (⇅) button if you need to reverse the conversion direction.
  6. Use the copy button to grab the result for a circuit analysis calculation or sensor reading comparison.
Show formula & methodology ↓Show less ↑

Formula & Methodology

The converter's base unit is siemens (S). Every supported unit has a fixed multiplier:

- 1 kilosiemens (kS) = 1,000 S
- 1 millisiemens (mS) = 0.001 S
- 1 microsiemens (µS) = 0.000001 S
- 1 mho = 1 S (identical, legacy name)

Any conversion follows:

Result = Input × (toBase of source unit ÷ toBase of target unit)

Worked example, converting a 1 kΩ resistor's conductance of 1 mS to siemens:

Result = 1 × 0.001 = 0.001 S

This confirms the standard reciprocal relationship: a 1,000 ohm resistor has a conductance of 0.001 siemens.

Frequently Asked Questions

What is electric conductance?
Electric conductance measures how easily current flows through a component or circuit, expressed in siemens, it's the mathematical reciprocal of resistance, so a component with low resistance has high conductance, and vice versa.
How do I convert millisiemens to siemens?
Divide the millisiemens value by 1,000, since one siemens equals 1,000 millisiemens. Enter your value with 'Millisiemens (mS)' as the source and 'Siemens (S)' as the target to apply this automatically.
What is a mho, and how does it relate to the siemens?
Mho ('ohm' spelled backwards) is the older, legacy name for the unit of conductance, numerically identical to the modern siemens, 1 mho equals exactly 1 siemens, and some older references and specific engineering fields still use the mho name out of convention.
How do I convert conductance to resistance?
Take the reciprocal: resistance (in ohms) equals 1 divided by conductance (in siemens). Use the [Electric Resistance Converter](/electric-resistance-converter/) for the resulting resistance unit conversions.
Why do sensor and instrumentation applications use microsiemens?
Many practical conductance measurements, like water conductivity sensors or certain biological measurements, involve very small conductance values, making microsiemens (µS) a more convenient unit than the base siemens, which would require awkward decimal fractions for these applications.
How does conductance relate to Ohm's Law?
Ohm's Law can be rewritten using conductance as current = voltage × conductance (I = VG), an alternative form to the more familiar I = V/R, this formulation is sometimes more convenient in circuit analysis involving components in parallel. See the [Ohm's Law Calculator](/ohms-law-calculator/) for related circuit calculations.
Why is conductance useful for components connected in parallel?
Total conductance for components in parallel simply adds together (unlike resistance, which requires a reciprocal formula for parallel combinations), making conductance a more mathematically convenient quantity for analysing parallel circuit branches.
What is a typical conductance value for a common electronic component?
This varies enormously depending on the component and its resistance, a 1 kΩ resistor has a conductance of 1 millisiemens (1 mS), while a much larger 1 MΩ resistor has a much smaller conductance of 1 microsiemens (1 µS).
Is conductance the same as conductivity?
No, conductance (siemens) describes a specific component or path's overall ability to conduct current, while [conductivity](/electric-conductivity-converter/) (siemens per metre) is a material property independent of a specific component's shape or size, similar to how resistance and resistivity differ.
Where is the mho unit still commonly used today?
The mho name persists in some legacy engineering documentation, older textbooks, and certain specialised fields (like some power system protection relay settings), though the siemens has been the officially adopted SI unit name since 1971.
Also known as
electric conductance convertersiemens to mho converterms to s converter conductancemicrosiemens converterconductance units converter