Chemistry Tools

Molecular Weight, Solutions, pH, Stoichiometry & Unit Converters

Molecular Weight Calculator

Examples: H2O, CuSO4, Ca(OH)2, CuSO4·5H2O

Supports elements, parentheses, and hydrates (use · or * for water of hydration)

Chemical Formula

Solution Preparation Calculator

Calculate the mass needed to prepare a solution of specific concentration

Calculate Mass Needed Calculate Concentration

Molecular Weight (g/mol)

Target Concentration

Target Volume

Dilution Calculator (C₁V₁ = C₂V₂)

Enter any three values to calculate the fourth

Initial Concentration (C₁)

Initial Volume (V₁)

Final Concentration (C₂)

Final Volume (V₂)

pH Calculator

From [H⁺] From [OH⁻] From pH

[H⁺] Concentration (M)

Buffer Calculator (Henderson-Hasselbalch)

pH = pKa + log([A⁻]/[HA])

Calculate pH Calculate Ratio

pKa

[A⁻] Conjugate Base (M)

[HA] Weak Acid (M)

Stoichiometry Calculator

Enter reactant/product information to calculate molar relationships

Substance 1 - Molecular Weight (g/mol)

Substance 1 - Stoichiometric Coefficient

Substance 1 - Amount

Substance 2 - Molecular Weight (g/mol)

Substance 2 - Stoichiometric Coefficient

Concentration Converter

Value

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Volume Converter

Value

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Mass Converter

Value

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Temperature Converter

Value

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Pressure Converter

Value

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