Femtomoles to Moles Converter

fmol

mol

Common Conversions

fmol	mol
1	1e-15
10	1e-14
100	1e-13
1000	1e-12
10000	1e-11
100000	1e-10
1000000	1e-9
1000000000	0.000001
1000000000000	0.001
1000000000000000	1
10000000000000000	10
1000000000000000000	1000

Why this conversion matters in chemistry

Triple-quadrupole LC-MS/MS routinely pushes detection limits down to ~10 fmol on-column for peptides. Converting that back to mol gives 10⁻¹⁴ mol, which for a 2 kDa peptide standard works out to about 20 pg of material — the threshold where matrix effects and instrument noise start dominating. Method-validation paperwork usually cites limits of detection in molar terms, so the conversion is what lets a per-injection LOD on one instrument compare cleanly to a published benchmark on another.

Formula

mol = fmol × 10⁻¹⁵

Worked Examples

1×10¹⁵ fmol = 1 mol

The conversion anchor — one mole equals 10¹⁵ femtomoles, the full prefix gap.

1 fmol = 1×10⁻¹⁵ mol

One femtomole — at or near the lower quantitation limit of routine LC-MS/MS for peptides.

1000 fmol = 1×10⁻¹² mol

One picomole — the bridge step into the next prefix up.

1000000 fmol = 1×10⁻⁹ mol

One nanomole — about the scale at which heavy-isotope internal-standard vials are sold.

Frequently Asked Questions

How do I convert fmol to mol?

Multiply by 10⁻¹⁵, or equivalently divide by 10¹⁵. So 1000 fmol becomes 10⁻¹² mol, which is also 1 pmol.

Why convert directly to moles?

Stoichiometric calculations and tabulated reference data run in moles. Even when the starting amount comes from a trace-analysis measurement in fmol, the comparison or downstream calculation usually wants the value in mol.

What does the femto prefix mean?

Femto is 10⁻¹⁵, one quadrillionth. So 1 fmol is 10⁻¹⁵ mol — about 6 × 10⁸ molecules of substance, still enough for many sensitive detection methods to count reliably.