maratoolHow to convert moles, millimoles, and micromoles
Type an amount — read mol, mmol, µmol, nmol, or lb-mol instantly.
Lab protocols quote mmol, clinical chemistry reports µmol/L, and reagent bottles list mol. The Amount of Substance Converter shifts between mole prefixes without mental exponent math.
How it works
- Pick units — "Millimole (mmol)" to "Mole (mol)", or any other pair.
- Type a value — the result updates as you type, with swap and copy.
- Copy — one click, with "Copied!" feedback.
Amount of substance conversion factors
Every unit converts through the mole (the base unit). To convert A → B, multiply by A's factor and divide by B's:
| Unit | = this many moles |
|---|---|
| Kilomole (kmol) | 1,000 |
| Mole (mol) | 1 |
| Millimole (mmol) | 0.001 |
| Micromole (µmol) | 1.0000 × 10^-6 |
| Nanomole (nmol) | 1.0000 × 10^-9 |
| Picomole (pmol) | 1.0000 × 10^-12 |
| Pound-mole (lb-mol) | 453.59237 |
When you need it
Typical scales: a PCR primer stock might be 100 µmol/L, a glucose panel reads ~5 mmol/L, and a synthesis batch uses 0.5 mol. To go from amount to mass, multiply moles by molar mass — see the Molar Mass Converter.
Sources & methodology
Conversion factors follow BIPM SI Brochure; exact-by-definition factors are marked in the tool itself. All math runs client-side in your browser — nothing is uploaded.
More conversion guides
- How to convert molar mass units (g/mol, kg/mol, Da)
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