Chemistry
Concentrations, reactions, element properties.
- Beer-Lambert law calculator (A = ε × l × c)Calculate absorbance, molar extinction coefficient, path length or concentration (A = ε × l × c).
- Buffer solution, Henderson-Hasselbalch equationBuffer pH, base/acid ratio for a target pH, and the amounts to weigh for a given volume, with the buffer zone checked.
- Chemical equation balancerExact balancing of any chemical equation, linear algebra over exact fractions, with the element-by-element check displayed.
- Dilution calculator, C1V1 = C2V2Calculate a dilution from the C1V1 = C2V2 formula. Quickly find the missing concentration or volume with automatic unit conversion.
- Mass ↔ amount of substance conversionConvert a mass to an amount of substance, or the reverse, from the molar mass (n = m / M).
- Mass/volume percentage calculator (% w/v)Convert between mass of solute, final solution volume and mass/volume percentage (% w/v).
- Molarity calculator (C = n / V)Calculate the molar concentration, amount of substance, or volume of a solution from C = n / V.
- pH calculator, acids and basesExact pH of strong and weak acids and bases, water autoionisation included. Textbook approximation computed alongside with its gap.
- Reaction yield and sample purityYield in its three directions, sample purity, molar mass and conversion into moles.
- Serial dilution calculatorGenerate a serial dilution protocol at a constant factor: concentration, volume to transfer, and diluent volume for each tube.
- Solution preparation calculator (m = C × V × M)Calculate the mass of solute needed to prepare a solution from its molar concentration, final volume, and molar mass.
- Solution quantities solver (n, V, c, cₘ, m, M)Enter the solution quantities you know (m, M, n, V, c): the solver computes the missing ones from equations. This is not a unit converter.
- Stoichiometry and limiting reactantLimiting reactant, masses of products formed and leftovers, from an equation that need not be balanced: the tool balances it itself.