Stoichiometry calculators
14 calculators Atom Economy Calculator Calculate atom economy, E-factor, waste %, and overall process efficiency. Enter up to 4 reagents individually, pick reactant or product-based mode, add percent yield.
Open Dilution Calculator Solve any dilution problem: find stock volume, final volume, or either concentration. Supports nM to M, mg/mL, %, nL to L, and serial dilution tables.
Open Grams to Moles Calculator Convert grams to moles or moles to grams with unit switches (mg, kg, mmol, umol). Pick a substance or enter any molar mass. Includes particle count and steps.
Open Molality Calculator Calculate molality (mol/kg) from moles or mass of solute, convert molarity to molality, and find freezing-point depression and boiling-point elevation instantly.
Open Molarity Calculator Calculate molarity, mass, or volume for any solution. Supports M, mM, uM, nM units, reverse-solve mode, and a common-chemicals molar mass table.
Open Mole Calculator Mole calculator with 4 modes: mass/molar mass, particle count, solution molarity, and ideal gas law. Instant results with worked steps and unit options.
Open Mole Fraction Calculator Find the mole fraction of 2 or 3 components by entering moles, masses, or gas partial pressures. Outputs mole percent, molality, and Raoult's law vapor pressure.
Open Normality Calculator Calculate solution normality (N), find mass needed for a target N, back-solve molarity or volume. Presets for HCl, H2SO4, KMnO4 and more.
Open AFR Calculator (Air-Fuel Ratio) Calculate the air-fuel ratio (AFR), lambda (lambda), equivalence ratio (phi), and percent excess air for gasoline, diesel, ethanol, methane, hydrogen, and more.
Open Avogadro's Number Calculator: Moles, Particles and Mass Convert between moles, number of particles, and mass using Avogadro's constant (6.022 x 10^23). Enter any two values and solve instantly, with step-by-step working.
Open Hydrogen Ion Concentration Calculator Convert pH to [H+] concentration or [H+] to pH instantly. Also calculates pOH, [OH-], Kw at any temperature, and classifies your solution as acid or base.
Open Molar Mass of Gas Calculator Calculate the molar mass of any gas from its pressure, volume, temperature, and sample mass using PV=nRT. Supports real-gas correction with compressibility factor Z.
Open Molecular Weight Calculator Calculate molecular weight (molar mass) from any chemical formula instantly. Get elemental composition, percent breakdown, and a step-by-step worked solution.
Open PPM to Molarity Calculator Convert ppm or ppb to molarity (mol/L, mM, uM) instantly. Supports solvent density adjustment, reverse conversion from molarity to ppm, and 9 common substances.
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