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🔬 Science

pH & pOH Calculator

Calculate pH, pOH, and concentrations of [H+] and [OH-] ions.

⚡ Instant 🆓 Free 🔒 Private
ph poh chemistry acidity alkalinity hydrogen ions

The pH Scale

pH is a measure of the hydrogen ion concentration in a solution. It indicates whether a solution is acidic, basic (alkaline), or neutral.

  • Acidic: pH < 7.
  • Neutral: pH = 7 (Pure water).
  • Basic: pH > 7.

The scale is logarithmic, meaning each unit represents a 10-fold change in concentration. pOH is similarly used to measure hydroxide ion concentration.