Convert Picogram to Femtogram
Convert picograms to femtograms instantly. 1 picogram = 1000 femtogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Femtogram to Picogram converter for the reverse conversion.
Units explained
Picogram
A picogram (pg) equals 10^-15 kilogram.
From the SI prefix 'pico-' (from Spanish 'pico', a small quantity).
Single-cell biology and ultratrace chemical analysis.
The pico- prefix entered the SI in 1960.
Femtogram
A femtogram (fg) equals 10^-18 kilogram.
From the SI prefix 'femto-' (from Danish/Norwegian 'femten', fifteen).
Nanotechnology and high-sensitivity mass spectrometry.
The femto- prefix was adopted by the CGPM in 1975.
Picogram to Femtogram conversion formula
The relationship between picograms and femtograms:
To convert picograms to femtograms, multiply the value in picograms by 1000. To reverse, multiply femtograms by 0.001.
How to use this converter
Type a value into the calculator. The result in femtograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Femtogram to Picogram converter for the reverse direction.
Step-by-step: convert picograms to femtograms
- Write down the value in picograms (pg).
- Multiply that value by the factor 1000.
- The product is the equivalent value in femtograms (fg).
- To reverse, multiply the femtogram value by 0.001.
Worked examples
Example 1 — Convert 1 pg to fg:
1 × 1000 = 1000 fg
Example 2 — Convert 100 pg to fg:
100 × 1000 = 100000 fg
Real-world example — Molecular dimensions
The diameter of small molecular structures (around 2 picograms) is often converted into related sub-micron units when comparing measurements across different microscopy techniques or imaging modalities.
2 pg × 1000 = 2000 fg
Real-world example — Wavelengths across the spectrum
Optical and atomic-scale phenomena are routinely cross-converted between sub-micron units. A photon of wavelength 800 picograms can be re-expressed in femtograms for direct comparison with another instrument's calibration data sheet.
800 pg × 1000 = 800000 fg
Picogram to Femtogram conversion table
Standard reference values for converting picograms to femtograms:
| Picogram [pg] | Femtogram [fg] |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 30 | 30000 |
| 40 | 40000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
Frequently asked questions
How many femtograms is 1 picogram?
How do I convert picograms to femtograms?
How do I convert femtograms back to picograms?
How many femtograms is 100 picograms?
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Sources & references
Conversion factor (1 pg = 1000 fg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.