femtomole per liter
Molar concentrationexact by definition
The femtomolar is 10⁻¹⁵ mol/L, the detection floor of the most sensitive immunoassays and of single-molecule counting techniques. At 1 fM a microlitre contains fewer than a thousand molecules, which is where concentration starts to be a statistical rather than a bulk statement.
Watch out: Below about a picomolar, adsorption onto the walls of the tube removes a meaningful fraction of the analyte. A femtomolar standard is only femtomolar if the vessel has been passivated.
| 1 | 1.0000000e-15 |
One femtomole per liter in every molar concentration unit
| 1 | femtomole per liter (fM)this unit | |
| 0.001 | picomole per liter (pM) | |
| 0.000001 | nanomole per liter (nM) | |
| 1.00000e-09 | micromole per liter (μM) | |
| 1.00000e-12 | mole per cubic meter (mol/m³) | |
| 1.00000e-12 | millimole per liter (mM) | |
| 1.00000e-12 | milliequivalent per liter (meq/L) | |
| 1.00000e-15 | mole per liter (molar) (M) | |
| 1.00000e-15 | mole per cubic decimeter (mol/dm³) | |
| 1.00000e-15 | normal (equivalent per liter) (N) |
Solvers that use molar concentration