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Femtomoles to Picomoles Converter

↔ Convert pmol to fmol instead

Common Conversions

fmol pmol
1 0.001
5 0.005
10 0.01
50 0.05
100 0.1
250 0.25
500 0.5
1000 1
5000 5
10000 10
100000 100
1000000 1000

Why this conversion matters in chemistry

Targeted mass-spec assays — selected-reaction monitoring, parallel-reaction monitoring — get built from femtomole anchor points but consume picomole-scale reagent stocks across a campaign. A typical seven-point standard curve from 1 to 1000 fmol on-column, run in triplicate, uses a few pmol of isotope-labeled internal standard per curve. Tracking the arithmetic between femtomoles and picomoles is what keeps an internal-standard inventory honest and lets a method developer estimate when a precious labeled-peptide stock will run out before the next lot arrives.

Formula

pmol = fmol / 1000

Worked Examples

1000 fmol = 1 pmol

The conversion anchor — one picomole equals exactly one thousand femtomoles.

1 fmol = 0.001 pmol

A single femtomole, near the lower quantitation limit of most LC-MS/MS methods running in selected-reaction monitoring mode.

500 fmol = 0.5 pmol

A mid-range standard-curve point, typically loaded for a confident quantitation in a targeted assay.

100 fmol = 0.1 pmol

A typical on-column amount for a low-abundance peptide in a quantitative proteomics workflow.

Frequently Asked Questions

How do I convert femtomoles to picomoles?
Divide by 1000. The relationship is exact, so 500 fmol becomes precisely 0.5 pmol with no rounding.
Where do femtomoles show up in practice?
Quantitative proteomics by LC-MS/MS, ultrasensitive immunoassays, single-cell mass spectrometry, and any analytical workflow whose detection limits push below the picomole scale. The femtomole is also the natural reporting unit for many on-column standard-curve points.
What is a femtomole?
A femtomole is 10⁻¹⁵ mol. Multiplied by Avogadro's number, that's about 6 × 10⁸ molecules — still hundreds of millions, even at the femtomole scale.