Dilution Calculator

Dilution Formula

Worked Example

Making 1 L of 0.1 M solution from a 2 M stock:

1. V₁ = C₂ × V₂ ÷ C₁
2. V₁ = 0.1 × 1 ÷ 2
3. V₁ = 0.05 L

In µL: 50000 µL · In m³: 0.00005 m³ · Solvent to add V₂ − V₁: 0.95 L · Dilution factor V₂/V₁: 20

Acid safety

When diluting concentrated acids, add acid to water, never water to acid: the heat released can boil the small amount of water and spatter acid.

More Moles and Concentration Calculators

• Molar Mass Calculator

  M = Σ nᵢ Aᵢ

  nᵢ number of atoms of each element, Aᵢ its standard atomic weight (g/mol)

  Example: Sulfuric acid, H2SO4: Molar mass M = 98.072 g/mol.

  Open the molar mass calculator →

• Moles Calculator

  n = m / M

  n amount (mol), m mass (g), M molar mass (g/mol); particles N = n × Nₐ

  Example: 36.03 g of water (M = 18.015 g/mol): Amount of substance n = 2 mol.

  Open the moles calculator →

• Molarity Calculator

  c = m / (M × V)

  c molarity (mol/L), m mass of solute (g), M molar mass (g/mol), V volume of solution (L)

  Example: 29.22 g of sodium chloride (M = 58.44 g/mol) made up to 1 litre: Molarity c = 0.5 mol/L (M).

  Open the molarity calculator →

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures .

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.