Convert Square Picometer to Square Femtometer
Convert square picometers to square femtometers instantly. 1 square picometer = 999999.9999999999 square femtometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Femtometer to Square Picometer converter for the reverse conversion.
Units explained
Square Picometer
A square picometer is a metric unit of area equal to 10⁻²⁴ m². It is used at atomic and molecular scales.
Derived by squaring the picometer (10⁻¹² m). The pico- prefix comes from the Italian 'piccolo' (small).
Square picometers appear in computational chemistry, surface science, and X-ray crystallography when discussing atomic cross-sections and very small surface patches.
SI prefix pico- adopted in 1960.
Square Femtometer
A square femtometer is a metric unit of area equal to 10⁻³⁰ m². It is used in nuclear and particle physics to describe interaction cross-sections at the nuclear scale.
Derived by squaring the femtometer (10⁻¹⁵ m), historically known as the fermi after physicist Enrico Fermi.
Square femtometers are equivalent to 0.01 barn. They appear in particle physics literature comparing strong interaction cross-sections and hadron sizes.
Femtometer adopted into SI in 1964; the fermi nomenclature predates this from mid-20th century nuclear physics.
Square Picometer to Square Femtometer conversion formula
The relationship between square picometers and square femtometers:
To convert square picometers to square femtometers, multiply the value in square picometers by 999999.9999999999. To reverse, multiply square femtometers by 1e-6.
How to use this converter
Type a value into the calculator. The result in square femtometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Femtometer to Square Picometer converter for the reverse direction.
Step-by-step: convert square picometers to square femtometers
- Write down the value in square picometers (pm²).
- Multiply that value by the factor 999999.9999999999.
- The product is the equivalent value in square femtometers (fm²).
- To reverse, multiply the square femtometer value by 1e-6.
Worked examples
Example 1 — Convert 1 pm² to fm²:
1 × 999999.9999999999 = 999999.9999999999 fm²
Example 2 — Convert 100 pm² to fm²:
100 × 999999.9999999999 = 1e+8 fm²
Real-world example — Molecular dimensions
The diameter of small molecular structures (around 2 square picometers) is often converted into related sub-micron units when comparing measurements across different microscopy techniques or imaging modalities.
2 pm² × 999999.9999999999 = 1999999.9999999998 fm²
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 square picometers can be re-expressed in square femtometers for direct comparison with another instrument's calibration data sheet.
800 pm² × 999999.9999999999 = 8e+8 fm²
Square Picometer to Square Femtometer conversion table
Standard reference values for converting square picometers to square femtometers:
| Square Picometer [pm²] | Square Femtometer [fm²] |
|---|---|
| 0.01 | 10000 |
| 0.1 | 100000 |
| 1 | 999999.9999999999 |
| 2 | 1999999.9999999998 |
| 3 | 2999999.9999999995 |
| 4 | 3999999.9999999995 |
| 5 | 4999999.9999999991 |
| 10 | 9999999.9999999981 |
| 20 | 2e+7 |
| 30 | 3e+7 |
| 40 | 4e+7 |
| 50 | 5e+7 |
| 100 | 1e+8 |
| 500 | 5e+8 |
| 1000 | 1e+9 |
Frequently asked questions
How many square femtometers is 1 square picometer?
How do I convert square picometers to square femtometers?
How do I convert square femtometers back to square picometers?
How many square femtometers is 100 square picometers?
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Metric / SI (15 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 pm² = 999999.9999999999 fm²) 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.