Calculator
What the Conductance Converter does
Conductance Converter: 1 S = 1000 mS, so multiply a siemens value by 1000 to get millisiemens, or divide to go back. Example: 1 S = 1000 mS.
The Conductance Converter takes Value, From and To and returns Result, How it was calculated and Reverse conversion. Each change is reflected immediately, which suits quick what-if comparisons.
Two industries often use the same word for slightly different quantities. The Conductance Converter exists to take that particular chore off your hands.
No sign-up, no data collection, no processing queue, just code running locally.
Further down the page: what each field expects, how the result is derived, and one example worked from the defaults.
What do the Conductance Converter fields mean?
The Conductance Converter uses 3 inputs. Starting values are already in place, which saves the usual blank-form hesitation about what a field wants.
| Field | What to enter | Default |
|---|---|---|
| Value | required | 1 |
| From | choose from Microsiemens (µS), Millisiemens (mS), Siemens (S), Kilosiemens (kS) or Mho (℧) | Siemens (S) |
| To | choose from Microsiemens (µS), Millisiemens (mS), Siemens (S), Kilosiemens (kS) or Mho (℧) | Millisiemens (mS) |
How does the Conductance Converter work?
Both units are converted through electrical conductance's base unit (S), so any of the 5 units in the dropdowns can be paired in either direction without loss of accuracy.
The constants come from the SI brochure and the 1959 international yard-and-pound agreement. For quantities defined empirically rather than by treaty, the current CODATA or IAU value is used instead.
Worked example
These are the values the Conductance Converter loads by default, and the result it produces from them. The figures are the tool’s live defaults and its live output, so you can reproduce them exactly.
| Value | 1 |
|---|---|
| From | Siemens (S) |
| To | Millisiemens (mS) |
| Result | 1000 mS |
|---|---|
| How it was calculated | 1 S = 1000 mS, so 1 × 1000 = 1000 mS |
| Reverse conversion | 0.001 S (if you meant 1 mS) |
Electrical conductance
Conductance, measured in siemens (S), is simply the reciprocal of resistance (S = 1/Ω). It describes how easily current flows through something, rather than how strongly it resists that flow.
Worth knowing
- Before the siemens was adopted, the same quantity was informally called the "mho". Ohm spelled backwards, a slightly playful name that’s still occasionally seen in older textbooks and equipment, even though siemens is now the standard SI unit.
- Conductance is especially useful in fields like electrochemistry and biology (nerve-cell membrane conductance, for instance) where it’s often more natural to describe how easily a signal passes through a medium than how much it’s resisted.
- Because conductance and resistance are reciprocals, a very high resistance corresponds to a very low conductance and vice versa. A material with 1 million ohms of resistance has just 1 microsiemens of conductance.
Definitions: BIPM SI Brochure · NIST reference on units
How to use it
- Put Value.
- Pick a value for From: the options are Microsiemens (µS), Millisiemens (mS), Siemens (S), Kilosiemens (kS) or Mho (℧).
- Pick a value for To: the options are Microsiemens (µS), Millisiemens (mS), Siemens (S), Kilosiemens (kS) or Mho (℧).
- The output refreshes live, so you can stop as soon as the number looks right.
- The results panel then shows Result, How it was calculated and Reverse conversion.
- The link encodes your inputs, so saving it is enough to reproduce the result later.
What this tool does not do
- Repeated conversions compound rounding, so convert once from the original value where you can.
- Conversion factors use SI definitions; some industries use their own rounded factors.
- Assumptions built into the method are stated above, but they are still assumptions.
- Check that each figure is in the unit the label asks for; that is the most common source of a wrong result.
Frequently asked questions
The form asks for Value, From and To. Defaults are loaded for all of them, which means a single edit is enough to get a meaningful answer.
With the values loaded when the page opens, result comes out as 1000 mS. That number tracks the inputs, so a small edit shows its sensitivity immediately.
No record is kept. We never receive what you type, so there is nothing on our side to retain.
Free, and there is no upsell. The whole tool is the free version.
Full double precision is used throughout; only the displayed figure is shortened.