Chemistry Calculators
Molar mass, moles, pH, buffers, gas laws, yields.
A professional Chemistry suite — molar & molecular mass, moles & mole fractions, empirical & molecular formulas, dilution, molarity, molality, normality, pH & pOH, Henderson–Hasselbalch buffers, percent composition, limiting reagent, theoretical & percent yield, combined & ideal gas laws. IUPAC / CODATA-referenced and offline-first.
Popular
Most used in Chemistry.
Molar Mass Calculator
Molar mass of any chemical formula.
Mole Calculator
Moles from mass and molar mass.
Mole Fraction Calculator
Mole fraction xᵢ = nᵢ / n_total.
Molecular Weight Calculator
Compute molecular weight from a formula.
Solution Dilution Calculator
C₁V₁ = C₂V₂ dilution helper.
Solution Concentration Calculator
Molarity, w/w %, and mass/volume.
Molarity Calculator
M = mol / L.
pH Calculator
pH = −log[H⁺] with acid/base classification.
New
Recently added.
Ideal Gas Law Calculator
PV = nRT solver for any variable.
Combined Gas Law Calculator
P₁V₁/T₁ = P₂V₂/T₂ solver.
Percent Yield Calculator
% yield of a reaction.
Theoretical Yield Calculator
Predicted product mass.
Reaction Yield Calculator
Yield % = actual / theoretical × 100.
Limiting Reagent Calculator
Find the limiting reactant.
Percent Composition Calculator
Mass percent of each element.
Buffer Calculator
Henderson–Hasselbalch buffer pH.
All Chemistry Calculators
21 tools available.
Combined Gas Law Calculator
P₁V₁/T₁ = P₂V₂/T₂ solver.
Ideal Gas Law Calculator
PV = nRT solver for any variable.
Molar Mass Calculator
Molar mass of any chemical formula.
Molarity Calculator
M = mol / L.
Mole Calculator
Moles from mass and molar mass.
pH Calculator
pH = −log[H⁺] with acid/base classification.
Solution Dilution Calculator
C₁V₁ = C₂V₂ dilution helper.
Mole Fraction Calculator
Mole fraction xᵢ = nᵢ / n_total.
Molecular Weight Calculator
Compute molecular weight from a formula.
Percent Composition Calculator
Mass percent of each element.
Reaction Yield Calculator
Yield % = actual / theoretical × 100.
Solution Concentration Calculator
Molarity, w/w %, and mass/volume.
FAQ
About Chemistry Calculators.
Which formulas back the results?
Molar masses use IUPAC 2021 standard atomic weights, gas law uses R = 8.314462618 J/(mol·K), Coulomb constant k_e = 8.9875517873681764 × 10⁹, and Avogadro N_A = 6.02214076 × 10²³ — all CODATA 2018 values shown in each report.
Can I use hydrates and parentheses?
Yes. The formula parser accepts nested parentheses (Ca(OH)2, Fe2(SO4)3) and hydrate notation (CuSO4·5H2O or CuSO4.5H2O).
Are calculations offline?
Every calculator runs 100% client-side. The periodic table (Z 1–118) is embedded in the bundle — no API keys or network requests.
Can I export or print my results?
Yes — Markdown, CSV, JSON, and plain-text artifacts are generated for every run, with a print-friendly layout.
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