Chemistry tools for students
The calculators show every line of arithmetic, so you can compare to your own work and find where you went off. Inputs survive in the URL, so a calculator link is a shareable problem.
Molar Mass Calculator
Probably the calculator you reach for most in gen chem. Type the formula, get the molecular weight with the per-element breakdown.
pH Calculator
pH, pOH, [H⁺], and [OH⁻] in one place. Type any one, get the other three.
Stoichiometry Calculator
Mole-to-mole and gram-to-gram conversions from a balanced equation, with the ratio written out.
Ideal Gas Law Calculator
Solves PV = nRT for whichever variable you leave blank. Picks the right R from the units you choose.
Dilution Calculator
C₁V₁ = C₂V₂. Leave one of the four blank and it solves for that one.
Electron Configuration
Aufbau-order configurations, including the Cr/Cu/Mo/Ag/Au exceptions students usually forget.