Pine Research Instrumentation logo
|
|
HomeTools
Reference Electrode Conversion Calculator

Reference Electrode Conversion Calculator

In electrochemical measurements, measured potential is always relative to the reference electrode used. It is common to convert the measured potential vs. reference to that of a different reference electrode, which has its own redox chemistry and therefore, a different scale. This calculator makes common assumptions.

How to Use this Calculator

  1. In the Input section, enter the measured potential (in mV) and select the reference electrode used to acquire this value from the dropdown list.
  2. Click Calculate
  3. Scroll down the Outputs section to view the potential you entered vs. many common reference electrodes.
  4. In the input section, click the Reset button to clear all values.
Input
mV
vs.
Outputs
Theoretical Reference Electrodes [Hâ‚‚]
\displaystyle 2H^{+}+2e \rightleftharpoons H_2 \qquad E^{\circ}=0 \; mV
mV
vs.
Hâ‚‚ (NHE)
mV
vs.
Hâ‚‚ (SHE)
Calomel [Hgâ‚‚Clâ‚‚]
\displaystyle {Hg_{2}Cl_{2}}_{(s)}+2e \rightleftharpoons 2Hg_{(liq)}+2Cl^- \qquad E^{\circ}=268 \; mV
mV
vs.
Hgâ‚‚Clâ‚‚ (saturated KCl)
mV
vs.
Hgâ‚‚Clâ‚‚ (saturated NaCl)
mV
vs.
Hgâ‚‚Clâ‚‚ (3.5 M KCl)
mV
vs.
Hgâ‚‚Clâ‚‚ (1 M KCl)
mV
vs.
Hgâ‚‚Clâ‚‚ (0.1 M KCl)
Silver Chloride [Ag/AgCl]
\displaystyle AgCl_{(s)}+e \rightleftharpoons Ag_{(s)} +Cl^- \qquad E^{\circ}=222 \; mV
mV
vs.
Ag/AgCl (saturated KCl)
mV
vs.
Ag/AgCl (3.5 M KCl)
mV
vs.
Ag/AgCl (3 M KCl)
mV
vs.
Ag/AgCl (1 M KCl)
mV
vs.
Ag/AgCl (seawater)
mV
vs.
Ag/AgCl (0.1 M KCl)
Mercury Sulfate [Hg/Hgâ‚‚SOâ‚„]
\displaystyle {Hg_{2}SO_{4}}_{(s)} +2e \rightleftharpoons 2Hg_{(liq)}+ SO_{4}^{2-} \qquad E^{\circ}=613 \; mV
mV
vs.
Hg/Hgâ‚‚SOâ‚„ (3.8 M Hâ‚‚SOâ‚„)
mV
vs.
Hg/Hgâ‚‚SOâ‚„ (1 M Hâ‚‚;SOâ‚„)
mV
vs.
Hg/Hgâ‚‚SOâ‚„ (0.5 M Hâ‚‚SOâ‚„)
mV
vs.
Hg/Hgâ‚‚SOâ‚„ (saturated Kâ‚‚SOâ‚„)
Mercury Oxide [Hg/HgO]
\displaystyle HgO_{(s)} +2e+H_{2}O \rightleftharpoons Hg_{(liq)}+2OH^- \qquad E^{\circ}=98 \; mV
mV
vs.
Hg/HgO (1 M NaOH)
mV
vs.
Hg/HgO (0.1 M NaOH)
mV
vs.
Hg/HgO (1 M KOH)
mV
vs.
Hg/HgO (0.1 M KOH)
mV
vs.
Hg/HgO (4.24 M / 20% w/w KOH)
Silver Sulfate [Ag/Agâ‚‚SOâ‚„]
\displaystyle {Ag_{2}SO_{4}}_{(s)}+2e \rightleftharpoons 2Ag_{(s)}+SO_{4}^{2-} \qquad E^{\circ}=654 \; mV
mV
vs.
Ag/Agâ‚‚SOâ‚„ (saturated Kâ‚‚SOâ‚„)
Copper Sulfate [Cu/CuSOâ‚„]
\displaystyle CuSO_{4}+2e \rightleftharpoons Cu_{(s)}+SO_{4}^{2+} \qquad E^{\circ}=342 \; mV
mV
vs.
Cu/CuSOâ‚„ (saturated CuSOâ‚„)