Nanometers to Femtometers Converter
Enter the length in nanometers below to convert it to femtometers.
Convert Nanometers to Femtometers
Enter a value in nanometers (nm) to convert to femtometers (fm).
Nanometers to Femtometers Conversion Chart (1–40 Continuous)
Continuous 1 to 40 nanometers lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Nanometers (nm) | Decimal (fm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 nm★ Common | 1,000,000 fm | 1000000 fm | 1000000 fm |
2 nm★ Common | 2,000,000 fm | 2000000 fm | 2000000 fm |
3 nm★ Common | 3,000,000 fm | 3000000 fm | 3000000 fm |
4 nm | 4,000,000 fm | 4000000 fm | 4000000 fm |
5 nm★ Common | 5,000,000 fm | 5000000 fm | 5000000 fm |
6 nm★ Common | 6,000,000 fm | 6000000 fm | 6000000 fm |
7 nm | 7,000,000 fm | 7000000 fm | 7000000 fm |
8 nm★ Common | 8,000,000 fm | 8000000 fm | 8000000 fm |
9 nm | 9,000,000 fm | 9000000 fm | 9000000 fm |
10 nm★ Common | 10,000,000 fm | 10000000 fm | 10000000 fm |
11 nm | 11,000,000 fm | 11000000 fm | 11000000 fm |
12 nm★ Common | 12,000,000 fm | 12000000 fm | 12000000 fm |
How to Convert Nanometers to Femtometers
To convert nanometers to femtometers, multiply the length by the following conversion ratio: 1,000,000 femtometers/nanometer.
Since one nanometer is equal to 1,000,000 femtometers, you can use this simple formula to convert:
The length in femtometers is equal to the length in nanometers multiplied by 1,000,000.
For example, here's how to convert 5 nanometers to femtometers using the formula above.
How Many Femtometers Are in a Nanometer?
There are 1,000,000 femtometers in a nanometer, which is why we use this value in the formula above.
Our nanometer fraction and decimal calculator can convert nanometers and femtometers, and it automatically converts the results to US customary, imperial, and SI metric values.
Nanometers and femtometers are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Nanometers 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 nanometers (nm) into fractional inches:
- Find the decimal inches result: Convert 5 nm 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 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. [1]
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.
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. [2]
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.
When converting length between nanometers (nm) and femtometers (fm), keep full floating-point precision (1 nm = 1,000,000 fm; 1 fm = 0.000001 nm) during intermediate calculations and round only the final femtometer figure to match your instrument tolerance.
More Nanometer & Femtometer Conversions
Need to calculate in the opposite direction? Use our femtometers to nanometers calculator to switch your starting unit immediately. You can also explore related tools such as converting femtometers to nanometers, converting nanometers to inches, or converting nanometers to millimeters.
Convert from Nanometers
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Nanometers (nm) to Femtometers (fm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Nanometer (nm) & Femtometer (Fermi) (fm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (nm to fm)