Home › Calculators › Chemistry & Biology Calculators
Chemistry & Biology Calculators
Molarity, moles, stoichiometry, pH, gas law, dilution, genetics and lab calculators. 35 free tools that run in your browser, no sign-up needed.
Search results
No tools match your search.
Molar Mass CalculatorMolar mass of any chemical formula with an element-by-element mass % breakdown.Interactive Periodic TableAll 118 elements with colour modes, filters, search and full element details.Chemical Equation BalancerBalance chemical, ionic and redox equations with the matrix method and steps.Molarity CalculatorSolve mass, volume, molarity or molar mass, and C1V1 = C2V2 dilutions with units.pH CalculatorConvert pH, pOH, [H+] and [OH-], or find the pH of strong and weak acids and bases.Dilution CalculatorSolve C1V1 = C2V2 for any variable: stock volume, final volume or concentration, with units.Percent Yield CalculatorPercent yield from actual and theoretical yield, or theoretical yield from moles and formulas.PPM CalculatorConvert ppm to mg/L, %, ppb and mg/kg, find ppm of a solution, or ppm to mg/m³ for gases.Grams to Moles CalculatorConvert grams to moles and back from a chemical formula, with molar mass and atom counts.Blood Type CalculatorPossible child blood types and their odds from both parents' ABO and Rh types, with Punnett squares.Buffer pH CalculatorBuffer pH from pKa and acid/base concentrations, or the recipe for a target pH.Combined Gas Law CalculatorSolve P1V1/T1 = P2V2/T2 for any variable, with Boyle's, Charles's and Gay-Lussac's modes.Electron Configuration CalculatorFull and noble-gas shorthand electron configuration, orbital diagram and valence electrons.Empirical Formula CalculatorElement percentages or grams to mole ratios, empirical formula and molecular formula.Gibbs Free Energy CalculatorΔG from ΔH, ΔS and temperature, with spontaneity, crossover temperature and K.Mass Percent CalculatorMass percent of a solution, percent composition of a formula, or mass for a target %.Molality CalculatorMolality from grams or moles of solute and solvent mass, or solve for either one.Moles to Atoms CalculatorConvert moles, grams and atoms or molecules with Avogadro's number, atoms per element.Protons Neutrons Electrons CalculatorCount protons, neutrons and electrons for any element, isotope or ion, with isotope notation.Serial Dilution CalculatorConcentration, transfer and diluent volume for every tube of a dilution series.Soap Lye CalculatorNaOH or KOH and water for a soap recipe from oil SAP values, superfat and water ratio.Theoretical Yield CalculatorTheoretical yield in grams and moles from limiting reagent mass and mole ratio.Titration CalculatorAnalyte concentration or equivalence volume from a titration, with pH curve and indicator.Punnett Square CalculatorBuild monohybrid, dihybrid or trihybrid Punnett squares with genotype and phenotype ratios.Stoichiometry CalculatorFrom one known mass or mole amount, get moles and grams of every reactant and product.Six Sigma CalculatorDPMO, yield and sigma level from defects, with the 1.5 sigma shift and a conversion table.Beer-Lambert Law CalculatorSolve A = εlc for absorbance, concentration, molar absorptivity or path length; %T conversion.Boyle's Law CalculatorSolve P1V1 = P2V2 for any missing pressure or volume, with units, gauge option and steps.Centrifuge RPM to RCF CalculatorConvert centrifuge RPM to RCF (× g) or RCF to RPM from rotor radius, with an RPM chart.Charles's Law CalculatorSolve V1/T1 = V2/T2 for volume or temperature, with °C, °F or K converted to kelvin.Hardy-Weinberg CalculatorAllele frequencies, expected genotypes and a chi-square equilibrium test from counts or p, q.Normality CalculatorFind normality from mass or molarity, and how much solid or stock acid makes an N solution.Oxidation Number CalculatorEnter a formula or ion to get the oxidation state of every element, with the rules used.Percent Solution CalculatorHow much solute and solvent for a w/v, w/w or v/v % solution, plus % from amounts and dilutions.Valence Electrons CalculatorValence electrons for any element, ion or molecule formula, with group-by-group working.
About Chemistry & Biology Calculators
Lab and classroom calculators for molar mass, molarity, dilution, pH, gas laws and balancing chemical equations. They save time on the repetitive arithmetic in chemistry and biology work.
Most used here: Molar Mass Calculator, Interactive Periodic Table and Chemical Equation Balancer.