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Femtomoles to Attomoles Converter
↔ Convert amol to fmol instead

Common Conversions

fmol amol
0.001 1
0.005 5
0.01 10
0.05 50
0.1 100
0.5 500
1 1000
5 5000
10 10000
100 100000
1000 1000000
10000 10000000

Why this conversion matters in chemistry

Single-cell proteomics operates at this boundary. A single cultured mammalian cell carries roughly 10⁸ molecules of actin — about 0.17 fmol per cell — while a low-abundance transcription factor at a few thousand molecules per cell sits in the low attomole range. The step from femtomoles down to attomoles is what separates mid-abundance housekeeping proteins from the regulatory proteins single-cell mass spectrometry is reaching toward. Multiplying by 1000 is the prefix step; the underlying technique change is from analog signal averaging to single-molecule digital counting.

Formula

amol = fmol × 1000

Worked Examples

1 fmol = 1000 amol

The conversion anchor — one femtomole equals exactly one thousand attomoles.

0.001 fmol = 1 amol

One attomole — about 600,000 molecules, well within the range of single-molecule counting techniques.

0.1 fmol = 100 amol

Sub-femtomole detection — the regime that ultrasensitive immunoassays and single-cell proteomics now reach.

10 fmol = 10000 amol

Ten femtomoles — comfortably above the LC-MS/MS quantitation limit for most peptides.

Frequently Asked Questions

How do I convert fmol to amol?
Multiply by 1000. The relationship is exact, so 0.5 fmol becomes precisely 500 amol with no rounding.
What instruments measure attomoles?
High-sensitivity LC-MS/MS reaches into the low-amol range for many peptides. Single-molecule fluorescence microscopy, digital PCR, and bead-based digital immunoassays operate routinely at attomole and sub-attomole levels.
How many molecules are in an attomole?
Avogadro's number times 10⁻¹⁸ — about 6.022 × 10⁵, which is roughly 600,000 molecules. Even at this scale, a quantity that feels vanishingly small still contains hundreds of thousands of individual molecules.