Convert Siemens to Millisiemens
Convert Siemens (S) to Millisiemens (mS) instantly and accurately.
Conversion Formula
mS = S × 1000
About Siemens
The siemens (S) is the SI derived unit of electrical conductance, equal to 1 ampere per volt (1 A/V = 1 Ω⁻¹ = 1 kg⁻¹·m⁻²·A²·s³), named after Werner von Siemens (1816-1892). Also known as the mho (℧), it describes how easily current flows: a 1 Ω resistor has 1 S conductance. Power MOSFETs are characterised by 1/Rₛ_ₒₙ in siemens; large RF transistors operate with transconductance of 1-10 S.
About Millisiemens
The millisiemens (mS) equals 10⁻³ S, covering physiological saline, seawater, and electrochemical cell conductances. Seawater conductivity is about 50 mS/cm; blood plasma is around 15 mS/cm; a 1 kΩ resistor presents 1 mS; a forward-biased transistor junction at a few milliamperes has dynamic conductance in the millisiemens range. 1 mS = 10⁻³ S = 10³ µS.
Quick Reference Table
| Siemens (S) | Millisiemens (mS) |
|---|---|
| 1 S | 1000 mS |
| 2 S | 2000 mS |
| 5 S | 5000 mS |
| 10 S | 10000 mS |
| 25 S | 25000 mS |
| 50 S | 50000 mS |
| 100 S | 100000 mS |