Femtometer to Attometer Converter (fm to am)

How to convert femtometers to attometers

1 femtometer is equal to 1,000 attometers, and 1 attometer is equal to 0.001 femtometers. To convert, multiply by the conversion factor:

attometers = femtometers × 1,000
attometers = femtometers ÷ 0.001

Example: convert 15 fm to am: 15 × 1,000 = 15,000 am.

A femtometer is 10⁻¹⁵ meters, the scale of atomic nuclei. A proton has a radius of about 0.84 fm.

Symbol: fm · 1 fm = 1 × 10⁻¹⁵ m · Category: Metric (SI)

An attometer is 10⁻¹⁸ meters. It's used in particle physics, for example as an upper bound on the size of quarks and electrons.

Symbol: am · 1 am = 1 × 10⁻¹⁸ m · Category: Metric (SI)

Frequently asked questions

How many attometers are in a femtometer?

There are 1,000 attometers in 1 femtometer (fm).

How many femtometers are in a attometer?

1 attometer (am) equals 0.001 femtometers.

How do I convert femtometers to attometers?

Multiply the length in femtometers by 1,000. For example, 15 fm × 1,000 = 15,000 am.

How do I convert attometers to femtometers?

Divide the length in attometers by 1,000, or multiply it by 0.001. You can also use the Attometer to Femtometer converter.