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Empirical Formula Calculator

Free SPM Chemistry tools to plan your revision and check your progress.

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Enter each element with its mass or percentage and its relative atomic mass, and this tool divides by moles and simplifies the ratio to give the empirical formula.

Enter each element, its mass (g) or percentage, and its Ar.

Everything runs in your browser - nothing you type is sent or stored.

A tool is only a starting point. For a plan built around your child, message us on WhatsApp.

Want a real plan, not just a number?

A teacher can turn this into a study plan built around your child.

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Written by the spmchemistry.com.my editorial teamUpdated: 4 September 2026
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