Chemistry

Chemistry Calculators & Laboratory Tools

Solve common chemistry and laboratory calculations with 26 focused tools. Formula parsing, unit conversion and supported calculations run locally in your browser.

Interactive Periodic Table Molecular Weight / Molar Mass Calculator Molarity Calculator Dilution Calculator — C₁V₁ = C₂V₂ Stoichiometry Calculator Chemical Equation Balancer

26 Chemistry Tools

Calculate molar mass, molarity, dilutions, stoichiometry, pH, buffers, gas laws and other laboratory quantities locally in your browser.

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Interactive Periodic Table

Explore all 118 elements by atomic number, symbol, atomic mass, group, period, category, phase and atomic radii.

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Molecular Weight / Molar Mass Calculator

Calculate molar mass from a chemical formula with parentheses, brackets and hydrate notation, plus element-by-element mass percentages.

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Molarity Calculator

Calculate molarity from mass or moles and solution volume, or calculate the solute mass needed for a target molarity.

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Molality Calculator

Calculate molality from solute mass, molar mass and solvent mass in kilograms.

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Normality Calculator

Calculate normality from molarity and the reaction-specific equivalent or n-factor.

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Dilution Calculator — C₁V₁ = C₂V₂

Solve any missing concentration or volume in the dilution equation C₁V₁ = C₂V₂ with automatic unit conversion.

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Solution Preparation Calculator

Calculate how many grams of a compound to weigh for a target molarity and final volume, with an optional purity correction.

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Mass ↔ Moles Calculator

Convert grams or other mass units to moles and moles back to mass using the formula-derived molar mass.

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Moles ↔ Molecules / Particles Calculator

Convert between moles and molecules, atoms, formula units or other particles using the exact Avogadro constant.

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Stoichiometry Calculator

Balance a reaction and convert a known reactant or product amount into moles and grams of another species using stoichiometric coefficients.

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Limiting Reagent Calculator

Find the limiting reagent from a balanced reaction and reactant amounts, then calculate product theoretical yields and leftover reactants.

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Theoretical Yield Calculator

Calculate the maximum theoretical product yield from a limiting reactant amount and a balanced chemical equation.

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Percent Yield Calculator

Calculate percent yield from actual and theoretical yield and flag results above 100% for review.

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Chemical Equation Balancer

Balance neutral chemical equations with the smallest whole-number coefficients and verify element conservation.

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Percent Composition Calculator

Calculate each element’s mass contribution and mass percent from a chemical formula.

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Empirical Formula Calculator

Determine an empirical formula from elemental masses or mass percentages by converting to mole ratios and integer subscripts.

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Molecular Formula Calculator

Calculate a molecular formula from an empirical formula and measured molar mass using the nearest whole-number multiplier.

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pH / pOH Calculator

Convert among pH, pOH, hydrogen-ion concentration and hydroxide-ion concentration using Kw = 1.0×10⁻¹⁴ at 25 °C.

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Henderson–Hasselbalch Calculator

Calculate buffer pH from pKa and the conjugate-base to weak-acid concentration ratio.

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Buffer Preparation Calculator

Calculate acid/base mole amounts for a target buffer pH, pKa, total concentration and volume, with optional masses from molar weights.

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Acid–Base Titration Calculator

Calculate the titrant volume required at equivalence from acid/base molarity, analyte volume and stoichiometric equivalent factors.

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Beer–Lambert Law Calculator

Solve A = εbc for absorbance, molar absorptivity, path length or concentration by leaving one field blank.

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Serial Dilution Calculator

Generate concentration and cumulative dilution factor for each step of a repeated serial dilution.

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ppm / ppb / ppt Concentration Calculator

Convert concentration fractions among percent, ppm, ppb, ppt and unitless mass fraction.

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Ideal Gas Law Calculator

Solve PV = nRT for pressure, volume, moles or absolute temperature with pressure and volume unit conversion.

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Nernst Equation Calculator

Calculate a non-standard electrochemical cell or electrode potential from E°, electron count, reaction quotient and temperature.

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Frequently asked questions

Which chemistry calculations are available?

The collection covers periodic-table lookup, molar mass, concentration and dilution, stoichiometry and yields, acid–base calculations, spectroscopy, gas laws and electrochemistry.

Do these chemistry calculators upload my values?

No. The chemistry calculators in this collection run with local JavaScript in your browser.

Can I use the tools for laboratory preparation?

Yes for calculation and planning, but always follow your laboratory SOPs, reagent specifications, safety data and required measurement practices.

About this tool

Free chemistry calculators for molar mass, molarity, dilution, stoichiometry, equation balancing, pH, buffers, titration, gas laws and electrochemistry. Browser-based and no signup.

Toolardo chemistry tools are calculation aids. For laboratory work, verify reagent form, purity, temperature-dependent constants, activity corrections and your local SOP before using a calculated value operationally.