Concentration conversion

5 units, with M as the base. Every value in the factor table is the number you multiply by, so reading across a row converts out of that unit and reading down a column converts into it.

Factor table

Concentration conversion factors. Each cell is the value to multiply the row unit by to get the column unit.
from \ to	pM	nM	µM	mM	M
pM	1	0.001	1 × 10⁻⁶	1 × 10⁻⁹	1 × 10⁻¹²
nM	1000	1	0.001	1 × 10⁻⁶	1 × 10⁻⁹
µM	1 × 10⁶	1000	1	0.001	1 × 10⁻⁶
mM	1 × 10⁹	1 × 10⁶	1000	1	0.001
M	1 × 10¹²	1 × 10⁹	1 × 10⁶	1000	1

Prefixes such as milli, micro and kilo follow the SI prefixes table.

Common conversions

mM to µM

1 mM = 1000 µM. In reverse, 1 µM = 0.001 mM.

mM to µM
mM	µM
1	1000
5	5000
10	10,000
50	50,000
100	100,000
500	500,000

µM to nM

1 µM = 1000 nM. In reverse, 1 nM = 0.001 µM.

µM to nM
µM	nM
1	1000
5	5000
10	10,000
50	50,000
100	100,000
500	500,000

Worked example

1 mM in µM
= 1 × 1000
= 1000 µM

Convert a number

The table gives the factor; the unit converter does the arithmetic, remembers the units you picked, and turns any conversion into a link you can share.