Chemistry Calculators

Plug in your values below and get instant results for common chemistry formulas — no sign-up, no fuss.

Molarity

M = n / V

Find the molar concentration of a solution from moles of solute and volume of solution.

Moles of solute (mol)

Volume of solution (L)

n = mass / M

Calculate the number of moles of a substance from its mass and molar mass.

Mass (g)

Molar mass (g/mol)

C₁V₁ = C₂V₂

Find the final concentration after diluting a stock solution to a new volume.

Initial concentration (mol/L)

Initial volume (L)

Final volume (L)

pH = −log[H⁺]

Calculate the pH of a solution from its hydrogen ion concentration.

[H⁺] concentration (mol/L)

P = nRT / V

Find the pressure of a gas from moles, temperature, and volume (R = 0.0821 L·atm/mol·K).

Moles (mol)

Temperature (K)

Volume (L)

% = (actual / theoretical) × 100

Compare the actual yield of a reaction to the theoretical maximum yield.

Actual yield (g)

Theoretical yield (g)

Results are for general reference. Ideal Gas Law calculation assumes R = 0.0821 L·atm/mol·K.