Solutions & Concentrations

  • 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.
  • 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.
  • TDS Calculator
    Convert electrical conductivity (EC in µS/cm) to total dissolved solids (TDS in ppm) using an adjustable conversion factor (0.5–0.7).
  • Solution Dilution Calculator
    Free dilution calculator using C1V1 = C2V2. Find how much stock solution and solvent you need to reach a target concentration and final volume.
  • Serial Dilution Calculator
    Calculate the final concentration after a serial dilution. Enter initial concentration, dilution factor, and number of steps to get Cₙ instantly.
  • Reconstitution Calculator
    Calculate final drug concentration after reconstitution and the exact volume to administer for a desired dose. Enter drug amount, diluent and dose.
  • Raoult's Law Calculator
    Calculate the vapor pressure of a solution with Raoult's Law: multiply the solvent mole fraction by the pure solvent vapor pressure. Free and instant.
  • Percent Solution Calculator
    Calculate weight/volume percent (%w/v) of a solution, or solve for mass of solute or volume of solution using the standard %w/v formula.
  • Neutralization Calculator
    Solve acid-base neutralization and titration problems using M·V·n = M·V·n. Find unknown concentration or volume for full neutralization.
  • Percentage Concentration to Molarity Calculator
    Convert percent by weight (% w/w) concentration to molarity using density and molar mass. Fast, accurate chemistry tool for solution preparation.
  • Mixing Ratio Calculator
    Calculate a mixing ratio A:B, each component's fraction and percent, and the exact amount of each part needed to make any total quantity.
  • Mass Percent Calculator
    Calculate mass percent (% w/w) of a solution from the mass of solute and total solution mass. Free, instant chemistry concentration calculator.
  • Henderson-Hasselbalch Calculator
    Calculate buffer solution pH with the Henderson-Hasselbalch equation from pKa and the conjugate base to weak acid concentration ratio.
  • Dilution Factor Calculator
    Calculate the dilution factor from initial sample volume and final volume. Get fold dilution and the amount of diluent to add for any lab dilution.
  • Concentration Calculator
    Calculate molar concentration (molarity) from moles of solute and volume of solution. Free online concentration calculator with worked examples.
  • Buffer pH Calculator
    Calculate the pH of a buffer solution from pKa and conjugate base/acid concentrations using the Henderson–Hasselbalch equation. Free and instant.
  • 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.
  • 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 %.
  • 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.
  • Activity Coefficient Calculator
    Calculate the ionic activity coefficient γ using the Debye–Hückel limiting law from ion charge and ionic strength. Free chemistry tool.
  • PPM to Molarity Calculator
    Convert ppm to molarity (mol/L) instantly. Enter concentration in ppm, molar mass, and solution density to get molarity and millimolarity.
  • Normality Calculator
    Calculate the normality (N) of a solution from solute mass, equivalent weight, and volume. Free online chemistry concentration calculator with formula.
  • Mole Fraction Calculator
    Calculate the mole fraction of a component from its moles and the total moles in a mixture. Free chemistry tool with formula, example and FAQ.

Categories