Molar to Nanomolar Converter

Common Conversions

M	nM
1e-9	1
1e-8	10
1e-7	100
0.000001	1000
0.00001	10000
0.0001	100000
0.001	1000000
0.01	10000000
0.1	100000000
1	1000000000
10	10000000000
100	100000000000

Why this conversion matters in chemistry

Stock bottles sit at M or mM; the assay well sits at nM. A 10 mM inhibitor in DMSO is 10⁷ nM, and walking that down to a 10 nM final concentration is a million-fold dilution — no single step does it, which is why serial dilutions exist. Multiplying by 10⁹ is the factor that lives behind those dilution schemes. It's also the reason a low-nanomolar IC50 is something to get excited about: a compound that works at 1 nM has to reach its target at roughly one part in 10⁹ compared to a stock that was itself already a considered dilution.

Formula

nM = M × 10⁹

Worked Examples

1 M = 1×10⁹ nM

A 1 M stock expressed in nM — the sort of number that makes the billion-fold dilution feel real.

1×10⁻⁹ M = 1 nM

The definition itself. A 1 nM working concentration is at the tight end of what most biochemical assays can detect.

0.001 M = 1×10⁶ nM

One millimolar written in nM — a DMSO stock concentration, a million-fold above the well.

1×10⁻⁶ M = 1000 nM

One micromolar. Below this, you're usually in single-digit nM territory only if the compound is potent.

Frequently Asked Questions

How do I convert M to nM?

Multiply by 10⁹. The relationship is exact, so 10⁻⁶ M is precisely 1000 nM with no rounding.

Why report concentrations in nanomolar?

The nanomolar scale is where drug potency, receptor binding affinities, and trace analyte detection naturally live. A Kd or IC50 in nM is easier to read and compare than the same value written as 10⁻⁹ M, especially across a series of compounds.

What kinds of concentrations fall in the nM range?

Free drug plasma levels for many dosed therapeutics, kinase and GPCR inhibitor IC50 values, antibody-antigen binding constants, and many environmental contaminants in water after concentration on a cartridge. Anything tighter than µM but not so tight it hits the assay detection floor.