Convert foot/square to femtometer/square Online | Free Acceleration Converter
Foot and Square Foot – A Short Note
A foot is a unit of length in the imperial and U.S. customary systems. One foot is equal to 12 inches or approximately 30.48 centimeters. It is commonly used to measure height, length, or distance—such as a person's height, the length of a room, or the size of an object.
A square foot (written as ft²) is a unit of area. It represents a square that is one foot long and one foot wide. One square foot is equal to 144 square inches or approximately 0.093 square meters. It is widely used in real estate, architecture, and construction to measure floor space, land area, or surface coverage.
In simple terms, a foot measures how long something is, while a square foot measures how much space it covers. Knowing the difference is essential when dealing with both length and area in everyday tasks or professional work.
Femtometer and Square Femtometer – A Short Note
A femtometer (symbol: fm) is a unit of length in the metric system, equal to:
1 femtometer = 10⁻¹⁵ meters
It is also known as a fermi (symbol: f), named after physicist Enrico Fermi. The femtometer is commonly used in nuclear physics to measure the size of atomic nuclei and subatomic particles. For example, a typical atomic nucleus is about 1–10 femtometers in diameter.
A square femtometer (symbol: fm²) is a unit of area that represents a square with sides one femtometer in length:
1 fm² = (10⁻¹⁵ m) × (10⁻¹⁵ m) = 10⁻³⁰ m²
This unit is used to describe extremely small surface areas at the nuclear or particle scale, though less commonly than the length unit.
In summary:
Femtometer (fm) measures very small lengths (nuclear scale)
Square femtometer (fm²) measures extremely tiny areas
Used mainly in nuclear and particle physics.