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Mole Calculator – Converts between grams, moles, and number of pa...

The Mole Calculator converts between grams, moles, and number of particles for a substance. This Mole Calculator applies the standard chemistry equation for this problem, returning an exact result with the formula shown. Useful for lab calculations, homework checks, and understanding the underlying science.

The formula behind this calculator: Moles = mass / molar mass; particles = moles x Avogadro's number (6.022 x 10²³). As a practical example: 18 grams of water (molar mass 18 g/mol) equals exactly 1 mole. All results are calculated instantly in your browser — no data is stored or transmitted.

Mole Calculator FAQ

What does the Mole Calculator calculate?

Converts between grams, moles, and number of particles for a substance.

Do these formulas assume ideal conditions?

Yes — most chemistry formulas here assume standard temperature, pressure, and ideal behaviour. Real lab results may differ due to impurities, temperature variation, and non-ideal conditions.

What is a significant figure and does this calculator use them?

Significant figures reflect the precision of a measurement. The calculator performs full-precision arithmetic — apply appropriate sig fig rounding to your final answer based on your input precision.

Does this work on mobile?

Yes — fully responsive and optimised for smartphones, tablets, and desktop browsers.