pH Calculator

Calculate pH, pOH, and hydrogen ion concentration for acid-base chemistry.

Category: Science · v1.0.0

Enter Any Value

pOH

[H+] (mol/L)

[OH-] (mol/L)

pH Scale

pOH

[H+]

-

[OH-]

-

Common Substances

Dilution Calculator (C1V1 = C2V2)

C1 (initial conc., mol/L)

V1 (initial vol., mL)

C2 (final conc., mol/L)

V2 (final vol., mL)

Buffer Solution (Henderson-Hasselbalch)

pH = pKa + log([A-]/[HA])

pKa

[A-] (conj. base)

[HA] (acid)

About This Tool

An interactive pH calculator for chemistry. Enter any one value (pH, pOH, [H+], or [OH-]) and instantly get all related values. Includes a visual pH scale with common substance references and dilution calculator. Great for chemistry coursework and lab preparation.

How to Use

Enter a pH value, pOH, [H+], or [OH-] concentration
All related values calculate automatically
See where your solution falls on the pH scale
Use the dilution calculator for lab prep (C1V1 = C2V2)