Solutions & Concentrations

  • Molarity to Molality Calculator
    Convert molarity (mol/L) to molality (mol/kg) using solution density and solute molar mass. Free online chemistry conversion calculator with formula.
  • g/L to Molarity Calculator
    Convert grams per liter (g/L) to molarity (mol/L) instantly. Enter concentration and molar mass to get molar and millimolar values.
  • Pool Chlorine Dosage Calculator
    Calculate how much chlorine to add to your pool to reach a target free chlorine ppm. Enter volume, current and target ppm, and product strength.
  • Reef Tank Salt Mix Calculator
    Calculate how much reef salt mix to add to your water to hit a target salinity (ppt). Enter water volume, target salinity, and your salt's dose rate.
  • PPB Calculator
    Calculate concentration in parts per billion (ppb) from mass of solute and mass of solution. Also shows ppm and percent. Free, instant chemistry tool.
  • Weight Percent to Molarity Calculator
    Convert weight percent (wt%) to molarity (mol/L) using solution density and solute molar mass. Free chemistry concentration calculator with the formula explained.
  • pH Buffer Preparation Calculator
    Calculate how much weak acid and conjugate base to mix for a target pH buffer using the Henderson-Hasselbalch equation. Get ratio, concentration & moles.
  • Percent Dilution Calculator
    Calculate the final percent concentration after adding diluent. Uses C2 = C1·V1/(V1+V_added) to find diluted strength, total volume, and dilution factor.
  • Dilution Calculator (Required Concentrate Volume)
    Calculate how much concentrate to use to make a target volume of diluted solution, by concentration or by dilution fold. For detergents, disinfectants, pesticides and more.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • SO₂ Wine Calculator
    Calculate how much potassium metabisulfite (KMS) to add to your wine to reach a target free SO₂ level, based on volume and current SO₂ in ppm.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.

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