Beer-Lambert Law Calculator
Absorbance or concentration from molar absorptivity and path length.
Chemistry and Lab
Molarity, pH, dilutions, and water chemistry with worked steps.
Bleach Dilution Calculator
Bleach dose and ratio for 100, 1000, or 5000 ppm mixes.
Breakpoint Chlorination Calculator
Pool shock dose and breakpoint from CC readings.
Brewing ABV Calculator
Alcohol by volume from original and final gravity, with ABW and attenuation.
Buffer pH Calculator
Henderson Hasselbalch pH from pKa and base acid ratio.
Calorimetry Calculator
Heat joules from mass, specific heat, and temperature rise.
Concentration Percent Calculator
Percent w/v, grams per liter, and mg per mL from solute mass and volume.
Dilution Calculator
Stock and water volumes to make any weaker solution (C1V1 = C2V2).
Empirical Formula Calculator
Simplest whole number formula from two element masses with mole ratio shown.
Faraday Electrolysis Calculator
Metal plated from current, time, molar mass, and electron count.
Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or temperature.
Hot Tub Chlorine Calculator
Liquid chlorine dose for spas from tub volume and ppm gap.
Limiting Reactant Calculator
Limiting reactant, excess left, and theoretical yield from masses.
Molality Calculator
Moles and molality from grams, molar mass, and solvent.
Molar Mass Calculator
Grams per mole for any formula from IUPAC atomic weights.
Molarity Calculator
Solution concentration in mol/L from grams, molar mass, and volume.
Mole Converter
Grams to moles to particles with Avogadro number.
Osmolarity Calculator
Calculated serum osmolarity from sodium, glucose, and BUN.
Partial Pressure Calculator
Gas partial pressure from share and total.
Percent Yield Calculator
Reaction efficiency from actual and theoretical yields, with loss and verdict.
pH Calculator
pH from hydrogen ion concentration and back, with acid or base verdict.
Pool Chlorine Calculator
Liquid chlorine dose from volume and ppm raise needed.
Pool CYA Stabilizer Calculator
Pool stabilizer dose from volume and CYA gap, with 30 to 50 ppm guidance.
Pool Salt Calculator
Salt pounds or kilos to reach target ppm in saltwater pools.
Priming Sugar Calculator
Priming sugar grams for bottle carbonation from batch size, temp, and target volumes.
Rain Barrel Disinfection Calculator
Rain barrel bleach dose from volume, strength, and clarity with wait times.
Soil Salinity Calculator
Soil salinity class and crop guidance from ECe.
Solution Preparation Calculator
Solute grams from molarity, volume, and molar mass.
TDS Water Quality Calculator
TDS ppm, taste grade, and EPA check from EC.
Titration Calculator
Acid-base titration unknown from molarity, volume, and mole ratio.
Vapor Pressure Calculator
Vapor pressure at any temperature from boiling point data.
Water Hardness Calculator
Grains per gallon, USGS band, and softener note from mg/L hardness.
Weak Acid pH Calculator
pH and ionization for five common weak acids at any concentration.
Wine Sulfite Addition Calculator
Wine SO2 addition in grams and solution mL from volume and ppm gap.