Scientific tools · Chemistry

Chemistry tools

Ready-to-use chemistry calculators: molar mass from formula, molarity, ideal gas law, pH and dilutions. Free and no registration.

Molar mass

Calculate the molar mass from a chemical formula

Formula (e.g. H2O, C6H12O6, Ca(OH)2)

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Molarity (concentration)

M = (mass / molar mass) / volume

Solute mass

Molar mass

g/mol

Solution volume

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Ideal gas law

P·V = n·R·T (R = 0.08206 L·atm/mol·K)

Moles n

mol

Temperature T

Volume V

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pH and pOH

pH = −log₁₀[H⁺]

H⁺ ion concentration

mol/L

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Dilution

C₁·V₁ = C₂·V₂

Initial concentration C₁

mol/L

Initial volume V₁

Final concentration C₂

mol/L

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Note: molar mass supports parentheses and nested groups, e.g. Ca(OH)2, Al2(SO4)3, K4[Fe(CN)6]. Calculations for educational purposes, with standard IUPAC atomic masses.

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