Molecular Formula Calculator

Molecular Formula Calculator: Calculate Chemical Molecular Formula

Calculate the molecular formula of a chemical compound based on its empirical formula and molar mass. Input the empirical formula (e.g., CH2O) using the keypad or keyboard and the compound’s molar mass, then click Calculate to get the molecular formula.

How It Works

Enter the empirical formula using the keypad buttons (C, H, O, N, S) or keyboard, and input the molar mass of the compound in g/mol. Click “Calculate” to see the molecular formula. The calculator displays the molecular formula and detailed calculation steps. Use the “Share” button to copy the calculator’s URL or the “Embed” button to copy an iframe code for embedding on another website.

Molecular Formula Calculator

Result

Molecular Formula:

Steps

About Molecular Formula Calculator

The Molecular Formula Calculator computes the molecular formula of a chemical compound based on its empirical formula and molar mass. It’s a useful tool for chemistry students and researchers determining the exact composition of compounds.

How to Use

Enter the empirical formula (e.g., CH2O) using the keypad buttons (C, H, O, N, S) or keyboard.
Enter the molar mass of the compound in g/mol (e.g., 180.16).
Click the “Calculate” button to compute the molecular formula. The page will scroll to the result.
Click the “Clear” button to reset the inputs and results.
Click the “Share” button to copy the calculator’s URL to your clipboard for sharing.
Click the “Embed” button to copy an iframe code for embedding the calculator on another website.
The molecular formula and detailed calculation steps will be displayed.

Formulas

Empirical Formula Molar Mass:

Sum of (Number of Atoms × Molar Mass) for each element

Multiplier:

Multiplier = Compound Molar Mass / Empirical Formula Molar Mass

Molecular Formula:

Empirical Formula × Multiplier

Important Notes

The empirical formula must be valid (e.g., CH2O, C6H12). Use uppercase for the first letter of elements and lowercase for the second (if applicable).
Molar masses are predefined for C, H, O, N, S. For other elements, you’ll be prompted to enter the molar mass.
The compound’s molar mass must be a multiple of the empirical formula’s molar mass.
The “Share” and “Embed” buttons require a browser that supports the Clipboard API.