Solutions & Concentrations

  • Titration Calculator
    Free titration calculator: find the unknown analyte concentration from titrant volume, concentration, and reaction stoichiometry. Fast acid-base & redox results.
  • Water Hardness Calculator
    Convert calcium and magnesium concentrations into total water hardness as mg/L CaCO3 and grains per gallon, with a soft-to-very-hard classification.
  • PPM Calculator
    Calculate concentration in parts per million (ppm) from mass of solute and mass of solution. Free online PPM calculator with formula and worked example.
  • Buffer Capacity Calculator
    Calculate the buffer capacity (β) of a weak-acid buffer from its total concentration, pKa, and pH using the standard β formula.
  • Beer-Lambert Law Calculator
    Calculate absorbance with the Beer-Lambert law A = ε × c × l from molar absorptivity, concentration and path length. Also returns transmittance.
  • Percent Ionization Calculator
    Enter initial and equilibrium concentrations (mol/L) to compute percent ionization (%) and degree of dissociation for weak acids or bases.
  • Brine Calculator
    Brine calculator: enter your water weight and target brine percent to find exactly how many grams of salt you need for pickling and fermenting.
  • Boiling Point Elevation Calculator
    Calculate boiling point elevation (ΔTb) and the new boiling point of a solution from the van't Hoff factor, Kb constant, and molality.
  • Boiling Point Elevation Calculator
    Calculate boiling point elevation (ΔTb) from molality, the ebullioscopic constant Kb, and the van't Hoff factor i. Free chemistry colligative-property tool.
  • Bleach Dilution Calculator
    Calculate how much bleach and water to mix to reach a target disinfectant concentration in ppm. Enter target ppm, total volume, and stock %.
  • Salt Solution Concentration Increase Calculator (Adding Salt)
    Find how much pure salt to add to a saline solution to raise its mass-percent concentration to a target value, plus the final mass and salt content.
  • Dilution Ratio Calculator
    Calculate how much water to add to a concentrate for any dilution ratio (e.g. 1:10). Get exact water and total mixed volume in your own units.
  • Pool Salt Calculator
    Calculate how much salt to add to your saltwater pool. Enter pool volume, current and target ppm to get pounds, kilograms, and 40 lb bags needed.
  • Pool Shock Calculator
    Calculate how much pool shock to add based on your pool volume and the free chlorine ppm increase you want. Supports cal-hypo, dichlor, and liquid chlorine.
  • Molarity Calculator
    Calculate molarity easily with this molarity calculator. Input the number of moles and volume in liters to determine the concentration of a solution. Accurate results for chemistry calculations.
  • Sulfur Dilution Calculator
    Calculate the mass of sulfur needed for any solution. Enter volume and desired concentration to get grams of sulfur required instantly.
  • Mizuwari Dilution Calculator
    Calculate how much liquor and water to mix for a water-cut "mizuwari" drink. Enter target strength, total volume and spirit ABV to get exact ml.
  • Mizuwari Dilution Calculator
    Work out how much water to add to whisky or shochu to dilute it to your target strength. Calculates water needed and the total mizuwari volume.
  • Cell Dilution Calculator
    Cell dilution calculator using C1V1 = C2V2. Find the stock cell volume and diluent needed to reach a target final concentration and volume.
  • Mixing Two Saline Solutions — Resulting Concentration Calculator
    Mix two saltwater solutions of different concentrations and instantly find the total salt, total mass, and the resulting concentration (mass-weighted average).
  • Saline Solution Dilution Calculator
    Find how much pure water to add to dilute a salt-water (saline) solution to a lower target concentration. Computes salt mass, final mass and water needed.
  • Alligation Calculator
    Use the alligation method to find the ratio and amounts of two solutions needed to reach a desired concentration. Free pharmacy & chemistry tool.
  • Alcohol Dilution Calculator
    Calculate how much water to add to dilute a spirit or alcohol to a lower target ABV. Enter initial volume, current ABV and target ABV.
  • Activity Coefficient Calculator
    Calculate the ionic activity coefficient γ using the Debye–Hückel limiting law from ion charge and ionic strength. Free chemistry tool.

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