Chemistry Calculator

Comprehensive collection of chemical calculations for molar mass, concentration, pH value and more

General Chemistry

Molar Mass (M = Σ(m)) Popular
Calculate the molar mass from chemical formula. Atomic mass, molecular formulas, H2O, CO2, NaCl and more
pH Value (pH = -log[H⁺]) Popular
Calculate pH, pOH and concentration of H⁺ and OH⁻ ions. For acids, bases and neutral solutions

Solutions and Concentration

Molar Concentration (c = n/V) New
Calculate molar concentration of solutions. Molarity, amount of substance, volume, mol/L
Dilution (c₁V₁=c₂V₂) New
Calculate solution dilutions. Dilution law, concentration, volume, serial dilution

Acid-Base Chemistry

Calculators will be added here...

Stoichiometry

Stoichiometry (n = m/M) New
Calculate moles, mass and ratios in chemical reactions. With molar mass and chemical equations

Buffer and Equilibrium

Henderson-Hasselbalch (pH = pKa + log) New
Calculate pH of buffer solutions. Buffer, acid-base, pKa and salt form/acid form ratio

Thermodynamics

Osmotic Pressure (π = i·c·R·T) New
Calculate osmotic pressure of solutions. van't Hoff equation, colligative properties, osmosis
About This Collection

This collection provides professional calculators for the most important chemical calculations in everyday laboratory work, research and education. All calculators use international standards and common chemistry conventions.

The calculators support you with:

  • Precise molar calculations
  • Concentration conversion and dilutions
  • pH value and pOH calculations
  • Stoichiometric analysis
  • Buffer capacity and equilibrium calculations
Quick Reference
M = Σ(m)
Molar Mass
c = n/V
Concentration
pH = -log[H⁺]
pH Value
ΔG = ΔH - TΔS
Gibbs Energy
c₁V₁ = c₂V₂
Dilution