Electric Conductance Converter
Convert electric conductance units — siemens, millisiemens, microsiemens, mho, and more. Free online conductance converter for electronics, electrochemistry, and electrical circuit analysis.
Understanding Electric Conductance
Electric conductance measures how easily current flows through a component. You express conductance in siemens (S), named after inventor Werner von Siemens. One siemens equals one ampere per volt.
Conductance represents the reciprocal of resistance. High conductance indicates good current flow. Low conductance indicates poor current flow.
Conductance Formulas
G = 1 / R
Definition: Conductance equals one divided by resistance. Siemens and ohms are reciprocal units.
G = I / V
Ohm's Law form: Conductance equals current divided by voltage.
G = σ × A / L
Material conductance: Conductance equals conductivity times area divided by length.
Example: A 100-ohm resistor has conductance G = 1 / 100 Ω = 0.01 S or 10 millisiemens.
Common Conductance Conversions
| Siemens (S) | Millisiemens (mS) | Microsiemens (μS) | Mho |
|---|---|---|---|
| 0.000001 | 0.001 | 1 | 0.000001 |
| 0.001 | 1 | 1,000 | 0.001 |
| 0.01 | 10 | 10,000 | 0.01 |
| 0.1 | 100 | 100,000 | 0.1 |
| 1 | 1,000 | 1,000,000 | 1 |
Practical Applications
Water Quality Testing
Conductivity meters measure water purity in microsiemens per centimeter. Pure water shows 0.055 μS/cm. Seawater reaches 50,000 μS/cm. Municipal water typically ranges 50-1,500 μS/cm.
Parallel Circuit Analysis
Parallel conductances add directly. Total conductance equals G1 + G2 + G3. This simplifies parallel resistor calculations compared to resistance formulas.
Semiconductor Characterization
Transconductance measures amplifier gain in millisiemens. A MOSFET with 50 mS transconductance produces 50 mA drain current change per volt of gate voltage.
Electroplating Solutions
Bath conductivity indicates ion concentration. Operators monitor conductance to maintain proper plating rates. Temperature compensation ensures accurate readings.
Frequently Asked Questions
What is the difference between conductance and conductivity?
Conductance describes a specific component in siemens. Conductivity describes a material property in siemens per meter. Conductivity remains constant regardless of dimensions.
Why use siemens instead of mho?
Siemens is the official SI unit. Mho (ohm spelled backward) was the older name. Both represent the same quantity. Modern standards prefer siemens.
How does temperature affect conductance?
Metal conductance decreases with temperature. Electrolyte conductance increases with temperature. Semiconductor conductance increases dramatically with temperature.
How do you measure conductance?
Measure resistance with an ohmmeter, then calculate G = 1/R. Conductivity meters directly display conductance for liquid samples using specialized probes.
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