Conductance Units Converter
Convert electrical conductance between siemens, millisiemens, microsiemens, and nanosiemens. Enter a value, then choose the From unit and To unit.
Convert Electrical Conductance Between Units
Conductance Units Formula
Where:
- \(G_{\mathrm{from}}\) — the entered conductance in the From unit
- \(G_{\mathrm{to}}\) — the converted conductance in the To unit
- \(f_{\mathrm{from}}\) and \(f_{\mathrm{to}}\) — the numbers of siemens represented by one From unit and one To unit, respectively
The calculator first expresses the entered value in siemens, then divides by the factor for the selected output unit. The factors are 1 for S, 0.001 for mS, 0.000001 for µS, and 0.000000001 for nS.
Conductance Units – Calculation Example
Example: convert the default value of 1 siemens (S) to millisiemens (mS).
\[G_{\mathrm{to}}=1\,\mathrm{S}\times\frac{1}{0.001}=1000\,\mathrm{mS}\]
Result: 1 S equals 1,000 mS.
How to use the calculator
- Enter a nonnegative number in Conductance value. Use the unit that matches the number you have.
- Under From unit, select Siemens (S), Millisiemens (mS), Microsiemens (µS), or Nanosiemens (nS).
- Under To unit, select the unit you want for the answer.
- Read Converted Conductance Value. The result includes the selected output unit.
For example, to express 250 µS in mS, enter 250, choose Microsiemens (µS) as the From unit, and choose Millisiemens (mS) as the To unit. The result is 0.25 mS. You can also select the same unit in both menus to leave the value unchanged.
What conductance means
Electrical conductance describes how readily current passes through a particular component or path. Its SI unit is the siemens (S). For a resistance \(R\) measured in ohms, conductance is \(G=1/R\), measured in siemens. For instance, a resistance of 1,000 Ω corresponds to a conductance of 0.001 S, or 1 mS. A higher conductance means less opposition to current through that path.
Conductance values often span several orders of magnitude. A circuit measurement might be easier to read as 500 µS than as 0.0005 S; both describe the same conductance. Converting units does not change the measured property—it only changes the scale used to report it. Check the unit printed beside a measurement before comparing it with a specification or another reading.
Conductance is related to current, but it is not a current measurement. For an ohmic component under suitable conditions, current and voltage satisfy \(I=GV\). If you need to express a measured current in different units, use the Electric Current Converter. Conductance also differs from electrical conductivity: conductivity is a material property, whereas the conductance of a component depends on both its material and its dimensions.
Unit reference
| Unit | Symbol | Equivalent in siemens |
|---|---|---|
| Siemens | S | 1 S |
| Millisiemens | mS | 0.001 S |
| Microsiemens | µS | 0.000001 S |
| Nanosiemens | nS | 0.000000001 S |
Each step down this list makes the unit 1,000 times smaller: 1 S = 1,000 mS, 1 mS = 1,000 µS, and 1 µS = 1,000 nS. The symbol µ is the Greek letter mu, not the letter m; confusing µS with mS introduces a factor-of-1,000 error.
Assumptions and practical limits
This tool converts a stated conductance value; it does not measure a component or calculate conductance from resistance, voltage, current, or physical dimensions. The selectable units are S, mS, µS, and nS. “Mho” and reciprocal ohm (Ω⁻¹) are alternative names or notations for the siemens, but they are not separate selections in the menus.
The displayed result is rounded to six decimal places. A very small nonzero value can therefore appear as zero when converted to a much larger unit. For example, 1 nS is 0.000000001 S, but converting it to S may display 0 S. Choose a smaller output unit, such as nS or µS, when you need to preserve a small value in the displayed result.
Conductance can change with temperature, operating conditions, or—in an AC circuit—the frequency of the signal. A unit conversion does not account for those changes. Keep the measurement conditions consistent when comparing values. For other frequency-dependent measurements, the Frequency Converter can help express frequency in the units you need.
Frequently Asked Questions
How can I convert conductance units by hand?
Move the decimal point three places for each step between S, mS, µS, and nS. Moving toward a smaller unit multiplies the number by 1,000; moving toward a larger unit divides it by 1,000. For example, mS to nS is two steps toward smaller units, so 4.2 mS equals 4,200,000 nS.
What is a normal or good conductance value?
There is no universally good conductance value. A suitable reading depends on the component, its intended function, and the conditions under which it was measured. Compare your result with the relevant datasheet or specification, using the same measurement conditions. Also check the unit: a number reported in mS cannot be compared directly with one reported in µS.
Can I use this converter to change ohms into siemens?
No. Changing resistance in ohms to conductance in siemens requires a reciprocal calculation, not just a unit conversion: \(G=1/R\). For example, 2,000 Ω corresponds to 0.0005 S, or 500 µS. Once you have the conductance, you can convert it between the units offered here. The reciprocal formula requires a nonzero resistance.
Can electrical conductance be negative?
Ordinary static conductance for a passive resistor is nonnegative, which is what this converter accepts. In electronics, you may encounter negative differential conductance: over a particular operating range, current decreases as voltage increases. That describes the slope of a device’s current–voltage curve, not a negative value to enter into this unit converter.
Are siemens and microsiemens per centimeter the same kind of unit?
No. Siemens and microsiemens measure the conductance of a particular path, while microsiemens per centimeter (µS/cm) measures conductivity, commonly reported for liquids. You cannot convert µS/cm to µS by changing the metric prefix alone. You also need information about the measurement geometry, such as the electrode spacing and effective area or a calibrated cell constant.
Is AC conductance the same as admittance?
Not generally. In AC analysis, admittance includes both conductance and susceptance and is written \(Y=G+jB\). Conductance is its real component, \(G\); susceptance, \(B\), describes the reactive component. Both components use siemens, but converting a value’s unit does not turn total admittance into conductance. Check which quantity your instrument or source reports.
How many digits should I keep after converting conductance?
Keep a number of significant figures appropriate to the original measurement. Unit conversion does not make a reading more precise: if a measurement is reported as 2.3 mS, writing it as 2,300,000 nS does not imply all seven digits were measured exactly. For calculations, retain extra digits until the final result, then round according to the measurement’s precision.