Convert Square Meter to Square Femtometer
Convert square meters to square femtometers instantly. 1 square meter = 1e+30 square femtometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Femtometer to Square Meter converter for the reverse conversion.
Units explained
Square Meter
A square meter is the SI base unit of area, defined as the area of a square with sides of one meter. It is the universal scientific unit for area.
Defined by squaring the meter, which was redefined in 2019 in terms of the speed of light. The meter itself was originally proposed by the French Academy of Sciences in 1791 as 1/10,000,000 of the distance from the equator to the North Pole.
Square meters are the universal SI unit for area, used in real estate (most countries outside the US/UK), construction, physics, engineering, materials science, biology, and nearly all scientific contexts worldwide.
Meter adopted as SI base unit in 1960; current exact definition via speed of light dates to 2019.
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 Meter to Square Femtometer conversion formula
The relationship between square meters and square femtometers:
To convert square meters to square femtometers, multiply the value in square meters by 1e+30. To reverse, multiply square femtometers by 1e-30.
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 Meter converter for the reverse direction.
Step-by-step: convert square meters to square femtometers
- Write down the value in square meters (m²).
- Multiply that value by the factor 1e+30.
- The product is the equivalent value in square femtometers (fm²).
- To reverse, multiply the square femtometer value by 1e-30.
Worked examples
Example 1 — Convert 1 m² to fm²:
1 × 1e+30 = 1e+30 fm²
Example 2 — Convert 100 m² to fm²:
100 × 1e+30 = 1e+32 fm²
Real-world example — Human-scale to atomic dimensions
One square meter equals one billion square femtometers — the canonical metric conversion bridging everyday objects and atomic-scale features in physics, chemistry, and electronics.
1 m² × 1e+30 = 1e+30 fm²
Real-world example — Meter to nanoscale
One square meter equals one billion square femtometers. Physics curricula use this conversion to teach orders of magnitude when introducing the electromagnetic spectrum.
1 m² × 1e+30 = 1e+30 fm²
Square Meter to Square Femtometer conversion table
Standard reference values for converting square meters to square femtometers:
| Square Meter [m²] | Square Femtometer [fm²] |
|---|---|
| 0.01 | 1e+28 |
| 0.1 | 1e+29 |
| 1 | 1e+30 |
| 2 | 2e+30 |
| 3 | 3e+30 |
| 4 | 4e+30 |
| 5 | 5e+30 |
| 10 | 1e+31 |
| 20 | 2e+31 |
| 30 | 3e+31 |
| 40 | 4e+31 |
| 50 | 5e+31 |
| 100 | 1e+32 |
| 500 | 5e+32 |
| 1000 | 1e+33 |
Frequently asked questions
How many square femtometers is 1 square meter?
How do I convert square meters to square femtometers?
How do I convert square femtometers back to square meters?
How many square femtometers is 100 square meters?
Popular area unit conversions
Convert Square Meter to other area units
Show all Square Meter conversions
Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Sources & references
Conversion factor (1 m² = 1e+30 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.