The angstrom unit (Å) is a unit of length used to measure very small distances. It is equal to one ten-billionth of a meter (0.0000000001 meter), or one hundred-thousandth of a micrometer. The angstrom unit is named after the Swedish physicist Anders Jonas Ångström (1814-74). Is angstrom an SI unit? No, angstrom is not an SI unit. It is a unit of length used primarily in the fields of atomic and molecular physics. Where is angstrom used? Angstrom is a unit of measurement that is used to measure very small objects or distances. It is named after the Swedish physicist Anders Jonas Ångström. Is angstrom CGS unit? No, angstrom is not a CGS unit. The CGS system has no unit of length named angstrom. The closest equivalent in the CGS system is the bohr, which is a unit of length equal to 0.52917721 x 10-10 meters. Is angstrom the smallest unit? Yes, the angstrom is the smallest unit. It is a unit of length that is used to measure very small distances. How is angstrom calculated? The angstrom is a unit of measurement that is used to express the size of atoms and molecules. It is equal to one ten-billionth of a meter, or 0.0000000001 meters.