Femtometers to Nanometers Converter
Enter the length in femtometers below to convert it to nanometers.
Convert Femtometers to Nanometers
Enter a value in femtometers (fm) to convert to nanometers (nm).
Femtometers to Nanometers Conversion Chart (1–40 Continuous)
Continuous 1 to 40 femtometers lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Femtometers (fm) | Decimal (nm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 fm★ Common | 0.000001 nm | 0 nm | 0 nm |
2 fm★ Common | 0.000002 nm | 0 nm | 0 nm |
3 fm★ Common | 0.000003 nm | 0 nm | 0 nm |
4 fm | 0.000004 nm | 0 nm | 0 nm |
5 fm★ Common | 0.000005 nm | 0 nm | 0 nm |
6 fm★ Common | 0.000006 nm | 0 nm | 0 nm |
7 fm | 0.000007 nm | 0 nm | 0 nm |
8 fm★ Common | 0.000008 nm | 0 nm | 0 nm |
9 fm | 0.000009 nm | 0 nm | 0 nm |
10 fm★ Common | 0.00001 nm | 0 nm | 0 nm |
11 fm | 0.000011 nm | 0 nm | 0 nm |
12 fm★ Common | 0.000012 nm | 0 nm | 0 nm |
How to Convert Femtometers to Nanometers
To convert femtometers to nanometers, multiply the length by the following conversion ratio: 0.000001 nanometers/femtometer.
Since one femtometer is equal to 0.000001 nanometers, you can use this simple formula to convert:
The length in nanometers is equal to the length in femtometers multiplied by 0.000001.
For example, here's how to convert 5 femtometers to nanometers using the formula above.
How Many Nanometers Are in a Femtometer?
There are 0.000001 nanometers in a femtometer, which is why we use this value in the formula above.
Our femtometer fraction and decimal calculator can convert femtometers and nanometers, and it automatically converts the results to US customary, imperial, and SI metric values.
Femtometers and nanometers are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Femtometers to Fractional Inches (1/16″, 1/32″ & 1/64″)
Plain-language method for turning decimal inches into a standard tape-measure or machinist ruler fraction
Calculators give you a decimal number (such as 0 in), but tape measures and woodworking rulers are marked in binary fractions of an inch—most commonly 1/16″ on carpenter tapes, 1/32″ on fine woodworking rules, and 1/64″ on machinist scales.
Here is the step-by-step worked example for converting 5 femtometers (fm) into fractional inches:
- Find the decimal inches result: Convert 5 fm to inches to get 0 in.
- Separate the whole inches from the decimal part: Keep the whole number 0 aside, leaving the decimal remainder 0.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0 by 16, 32, or 64, then round to the nearest whole number (values ending in .5 round up).
- Reduce the fraction to lowest terms: If the rounded top number (numerator) is even, divide both top and bottom by 2 (or their Greatest Common Divisor) until the top number is odd, then combine with your whole inches.
What Is a Femtometer?
A femtometer is a unit of length equal to 1e-15 meters (m), the base unit for length. One quadrillionth of a meter (10⁻¹⁵ m), used in nuclear physics. [1]
The femtometer is classified as a metric and SI-compatible unit of length. Femtometers can be abbreviated as fm; for example, 1 femtometer can be written as 1 fm.
In the metric system, "femto" is the standard SI prefix for quadrillionths, or 10⁻¹⁵. This makes the femtometer (fm) a convenient decimal multiple of the meter (m).
In practice, femtometers (fm) are widely used across fine-tolerance laboratory, analytical, and micro-scale length measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Nanometer?
One nanometer is equal to one-billionth (1/1,000,000,000) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval. [2]
The nanometer, or nanometre, is a multiple of the meter, the SI base unit for length. In the metric system, "nano" is the prefix for billionths, or 10⁻⁹. Nanometers can be abbreviated as nm; for example, 1 nanometer can be written as 1 nm.
Because 1 inch equals 25.4 millimeters and 1 millimeter equals 1,000,000 nanometers, there are exactly 25,400,000 nanometers in 1 inch (and 10 Angstroms in 1 nanometer).
The nanometer is an extremely small unit of length measurement, often used to measure things that are very small, such as the wavelengths of visible light (400 nm to 700 nm), the transistors and electrical pathways in computer processors, and thin-film nanotechnology.
When converting length between femtometers (fm) and nanometers (nm), keep full floating-point precision (1 fm = 0.000001 nm; 1 nm = 1,000,000 fm) during intermediate calculations and round only the final nanometer figure to match your instrument tolerance.
More Femtometer & Nanometer Conversions
Need to calculate in the opposite direction? Use our nanometers to femtometers calculator to switch your starting unit immediately. You can also explore related tools such as converting nanometers to femtometers, converting inches to nanometers, or converting meters to nanometers.
Convert from Femtometers
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Femtometers (fm) to Nanometers (nm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Femtometer (Fermi) (fm) & Nanometer (nm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (fm to nm)