Micromolar to Molar Converter

µM

Common Conversions

µM	M
0.1	1e-7
1	0.000001
10	0.00001
100	0.0001
1000	0.001
10000	0.01
50000	0.05
100000	0.1
500000	0.5
1000000	1
5000000	5

Why this conversion matters in chemistry

Pharmacology and biochemistry assays live in micromolar — drug screening hits at 5 µM, enzyme substrates dosed at 100 µM. Stocks are stored in molar — typically a 10 mM DMSO master from a solid sample. Going from µM to M is dividing by a million, the bookkeeping that lets the working concentration in a well meet the dilution math from the stock. A 5 µM IC50 in mol/L is 5 × 10⁻⁶ M; getting the prefix right is what separates a confident structure-activity comparison from one off by three orders of magnitude.

Formula

M = µM / 1000000

Worked Examples

1000000 µM = 1 M

The conversion anchor — one molar is exactly one million micromolar.

100 µM = 0.0001 M

A typical screening-assay starting concentration before a dose-response titration begins.

1 µM = 0.000001 M

One micromolar — a respectable potency for a kinase or GPCR ligand at the early-discovery stage.

10000 µM = 0.01 M

Ten millimolar written in µM — the kind of value that shows up when assay sheets and stock-solution math collide on the same page.

Frequently Asked Questions

How do I convert µM to M?

Divide by 1,000,000. The relationship is exact, so 100 µM becomes precisely 0.0001 M with no rounding.

What is 1 µM in mM?

1 µM = 0.001 mM, three orders of magnitude smaller. Most biochemistry slides between µM and mM more often than between µM and M, since the two adjacent prefixes cover most working ranges.

When does the conversion to M actually matter?

Whenever a calculation links concentration to mass through the molar mass — mass = M × V × MW — or when comparing literature potency values reported in different prefixes. Keeping the working unit in M throughout often prevents the accidental thousand-fold error.

What are typical physiological concentrations?

Drug plasma levels span roughly 0.01–100 µM for most therapeutics. Steroid and peptide hormones run at nM down to pM. Major electrolytes sit at mM scale. Serum albumin runs around 600 µM, calculated from a typical albumin concentration of 40 g/L and a molar mass near 66,500 g/mol.