Chemistry Calculators

Convert between pH and [H⁺] with acidity classification.

M = n / V (mol/L).

C₁V₁ = C₂V₂ — solve for any unknown.

PV = nRT — solve for any missing variable.

Half-life of any exponential decay.

Actual over theoretical yield ×100.

Convert between moles and grams via molar mass.

ΔT_b = K_b · m · i colligative property.

Normality from molarity and equivalents.

Buffer pH from pKa and concentrations.

Calculate molality (mol/kg) from moles of solute and mass of solvent.

Calculate the dilution factor (DF = V2/V1) between an initial and final volume.

Calculate pOH from hydroxide ion concentration, and its related pH via pH+pOH=14.

Calculate [H+] concentration from a given pH value.

Calculate [OH-] concentration from a given pOH value.

Calculate moles and volume of acid needed to neutralize a given amount of base.

Estimate a buffer's effective pH range and buffer capacity from pKa and concentration.

Calculate the acid dissociation constant Ka from equilibrium concentrations or pKa.

Calculate the base dissociation constant Kb from equilibrium concentrations or pKb.

Calculate pKa from a given Ka value.

Calculate pKb from Kb, and the conjugate acid's pKa via pKa+pKb=14.

Calculate the equilibrium constant Keq using the law of mass action.

Calculate the concentration-based equilibrium constant Kc.

Calculate the pressure-based equilibrium constant Kp from Kc, temperature and Δn.

Calculate reaction quotient Q and compare to Keq to predict reaction direction.

Convert moles of one reactant/product to another using balanced equation mole ratios.

Determine the limiting reactant from moles and stoichiometric coefficients.

Calculate the theoretical yield of a product from the limiting reactant.

Determine the empirical formula ratio from elemental mass percentages.

Determine the molecular formula multiplier from molecular and empirical formula mass.

Calculate the volume of an ideal gas from moles at 1 atm, at either 0 °C (22.414 L/mol) or 25 °C (24.465 L/mol).

Solve the combined gas law P1V1/T1 = P2V2/T2 for any missing variable.