Chemistry Calculators

Bond type between two elements from the Pauling electronegativity difference: nonpolar covalent, polar covalent or ionic.

Dilution equation C1 x V1 = C2 x V2: give any three values and get the fourth, plus solvent to add and the dilution factor.

Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points.

Empirical formula from percent or gram composition by element, and the molecular formula if you give the molar mass.

Radioactive decay: remaining fraction after a time, time to reach a fraction (carbon dating), decay constant and mean life.

Ideal gas law PV = nRT: give any three of pressure, volume, moles and temperature and solve the fourth, in common units.

Limiting reagent, theoretical yield and leftover excess for a balanced reaction from reactant masses; optional percent yield.

Molar mass and percent composition by element for a formula, including brackets and hydrates such as CuSO4.5H2O.

Molarity of a solution from solute grams and volume, or the grams of solute needed to make a target molarity and volume.

Convert between grams, moles and molecule counts for a chemical formula using Avogadro's number.

pH and pOH for a strong or weak acid or base, a hydrogen-ion concentration, or a buffer (Henderson-Hasselbalch).