Amount of Substance Converter — Moles & Millimoles

Convert between moles, millimoles, micromoles, nanomoles, kilomoles, and pound-moles.

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How this conversion works. Every unit is converted through the mole, the SI base unit for amount of substance defined in the BIPM SI Brochure.

How to use

  1. Pick the unit you are converting from, such as Kilomole (kmol) or Mole (mol).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Pound-mole (lb-mol) included.

Frequently asked questions

How do I convert millimole to mole?

1 millimole = 0.001 mole. Choose "Millimole (mmol)" as From and "Mole (mol)" as To, type a value, and the result updates instantly.

How many molecules are in a mole?

Exactly 6.02214076 × 10²³ elementary entities (the 2019 SI definition of the Avogadro constant). A millimole contains a thousandth of that.

What is a pound-mole?

A pound-mole is the amount of substance whose mass in pounds equals the molecular weight — exactly 453.59237 mol. US chemical-engineering texts use it alongside lb/ft³ and BTU.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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