Picometers to Nanometers Converter
Enter the length in picometers below to convert it to nanometers.
Convert Picometers to Nanometers
Enter a value in picometers (pm) to convert to nanometers (nm).
Picometers to Nanometers Conversion Chart (1–40 Continuous)
Continuous 1 to 40 picometers lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Picometers (pm) | Decimal (nm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 pm★ Common | 0.001 nm | 0 nm | 0 nm |
2 pm★ Common | 0.002 nm | 0 nm | 0 nm |
3 pm★ Common | 0.003 nm | 0 nm | 0 nm |
4 pm | 0.004 nm | 0 nm | 0 nm |
5 pm★ Common | 0.005 nm | 0 nm | 0 nm |
6 pm★ Common | 0.006 nm | 0 nm | 0 nm |
7 pm | 0.007 nm | 0 nm | 0 nm |
8 pm★ Common | 0.008 nm | 1/64 nm | 0 nm |
9 pm | 0.009 nm | 1/64 nm | 0 nm |
10 pm★ Common | 0.01 nm | 1/64 nm | 0 nm |
11 pm | 0.011 nm | 1/64 nm | 0 nm |
12 pm★ Common | 0.012 nm | 1/64 nm | 0 nm |
How to Convert Picometers to Nanometers
To convert picometers to nanometers, multiply the length by the following conversion ratio: 0.001 nanometers/picometer.
Since one picometer is equal to 0.001 nanometers, you can use this simple formula to convert:
The length in nanometers is equal to the length in picometers multiplied by 0.001.
For example, here's how to convert 5 picometers to nanometers using the formula above.
How Many Nanometers Are in a Picometer?
There are 0.001 nanometers in a picometer, which is why we use this value in the formula above.
Our picometer fraction and decimal calculator can convert picometers and nanometers, and it automatically converts the results to US customary, imperial, and SI metric values.
Picometers and nanometers are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Picometers 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 picometers (pm) into fractional inches:
- Find the decimal inches result: Convert 5 pm 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 Picometer?
A picometer is a unit of length equal to 1/1,000,000,000,000 of a meter (1e-12 m). One trillionth of a meter (10⁻¹² m), used for atomic radii. [1]
The picometer is classified as a metric and SI-compatible unit of length. Picometers can be abbreviated as pm; for example, 1 picometer can be written as 1 pm.
In the metric system, "pico" is the standard SI prefix for trillionths, or 10⁻¹². This makes the picometer (pm) a convenient decimal multiple of the meter (m).
In practice, picometers (pm) 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 picometers (pm) and nanometers (nm), keep full floating-point precision (1 pm = 0.001 nm; 1 nm = 1,000 pm) during intermediate calculations and round only the final nanometer figure to match your instrument tolerance.
More Picometer & Nanometer Conversions
Need to calculate in the opposite direction? Use our nanometers to picometers calculator to switch your starting unit immediately. You can also explore related tools such as converting nanometers to picometers, converting inches to nanometers, or converting meters to nanometers.
Convert from Picometers
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Picometers (pm) to Nanometers (nm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Picometer (pm) & Nanometer (nm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (pm to nm)