Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Elements

Element symbols in the same order as the moles list.

Moles (mol)

Mole amounts for each element.

Compute empirical formula element ratios by dividing each element's mole amount by the smallest mole amount. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Element ratios

Element symbol mapped to its ratio relative to the smallest amount, rounded to two decimals.

• Stoichiometric results assume the balanced reaction, stated purity, and complete conversion to the selected products. Yield, selectivity, side reactions, moisture, and measurement uncertainty must be handled separately.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Empirical Formula From Combustion Calculator

  Derive C:H mole ratios from combustion CO₂ and H₂O masses, normalized to the smallest amount.

• Empirical Ratio Calculator

  Divide two element mole amounts by the smaller one to obtain whole-number-friendly empirical ratios.

• Empirical Formula From CO2 and H2O Calculator

  Derive the empirical formula CₓHᵧ from combustion analysis CO₂ and H₂O masses normalized to whole-number ratios.