Chemistry

  • Alcohol By Volume (ABV) Calculator
    Calculate the alcohol by volume (ABV) of your beer, wine, or mead from original and final gravity readings using the standard ABV formula.
  • pH of a Strong Acid Calculator
    Calculate the pH, [H⁺], and pOH of a strong monoprotic or polyprotic acid from its molar concentration and number of acidic protons.
  • Weak Acid pH from Ka Calculator
    Calculate the pH of a weak acid from its Ka and concentration using the exact quadratic equilibrium solution. Get [H+], pOH and percent dissociation.
  • Grams to Milliliters Calculator
    Convert grams to milliliters using density. Enter mass in grams and density in g/mL to get the volume instantly with the formula V = m / ρ.
  • Moles to Grams Calculator
    Convert moles to grams instantly. Enter the amount in moles and the molar mass (g/mol) to find mass using mass = moles × molar mass.
  • Mass Needed for Molarity Calculator
    Calculate the mass of solute in grams needed to prepare a solution of a given molarity and volume. Enter molarity, volume, and molar mass.
  • PPM to Percent Calculator
    Convert parts per million (ppm) to percent instantly. Enter any ppm value and get the equivalent % using percent = ppm ÷ 10,000.
  • Molarity to PPM Calculator
    Convert molarity (mol/L) to parts per million (ppm) instantly. Enter molarity and molar mass to get ppm for dilute aqueous solutions.
  • Ka and pKa Calculator
    Convert between Ka and pKa instantly. Enter an acid dissociation constant to get pKa, or a pKa to get Ka using pKa = -log10(Ka).
  • Percent to PPM Calculator
    Convert a percent concentration to parts per million (ppm) instantly. Enter a percentage and get the ppm value using ppm = percent × 10,000.
  • 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.
  • Percentage Yield Calculator
    Calculate the percentage yield of a chemical reaction from actual and theoretical yields. Free chemistry % yield calculator with formula and worked example.
  • 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.
  • Oxidation Number Calculator
    Calculate the unknown oxidation number of an element in any molecule or ion using the rule that all oxidation states sum to the overall charge.
  • Activation Energy Calculator (Two-Temperature)
    Calculate the activation energy (Ea) of a reaction from two rate constants at two temperatures using the two-point Arrhenius equation. Free, instant.
  • Titration Molarity Calculator
    Find an unknown analyte concentration from titration data using Ma·Va·na = Mb·Vb·nb. Enter titrant molarity, volumes and stoichiometry.
  • ABV Calculator from Specific Gravity
    Calculate alcohol by volume (ABV) from original and final gravity readings. Free homebrew ABV calculator using OG, FG and apparent attenuation.
  • pH and pOH Relationship Calculator
    Convert between pH and pOH instantly using pH + pOH = 14. Enter a known pH or pOH to find the other plus [H⁺] and [OH⁻] concentrations.
  • Moles to Volume at STP Calculator
    Convert moles of an ideal gas to volume at STP using V = n × 22.414 L/mol. Fast, accurate chemistry tool with worked examples and formula.
  • Moles to Molecules Calculator
    Convert moles to number of molecules instantly using Avogadro's number (6.022×10²³). Free chemistry calculator with formula and worked example.
  • Grams to Atoms Calculator
    Convert grams to atoms instantly. Enter mass and molar mass to find the number of atoms or molecules using Avogadro's number (6.022 × 10²³).
  • Pottery Glaze Batch Calculator
    Scale any pottery glaze recipe to your batch size. Enter percentages and dry weight to get exact gram amounts per ingredient plus water needed.
  • 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.

Categories