The Ultimate Picotometer Guide
Everything you need to know about the picometer. Learn how to convert, visualize, and apply picometers in chemistry and physics without the headache.
The Ultimate Picotometer GuidePico To Meter
Pico to Meter Converter
Enter your value in pm to convert to m
FROM
pm
TO
1 × 10⁻¹²m
Scientific1.000000e-12 m
Also converts to:
More Converters
View all →Explore our complete suite of atomic-scale length converters — picometers, nanometers, ångströms and beyond.
⚛Picometer to Nanometer
Convert picometers to nanometers instantly. Essential for nanotechnology and molecular biology.
LENGTH🔬Nanometer to Ångström
Quick nm to Å conversion for crystallography papers and X-ray diffraction data.
LENGTH⚗Picometer to Ångström
Convert between pm and Å — the two most common units for atomic radii and bond lengths.
LENGTH🧬Nanometer to Micrometer
Bridge the gap from the nano to micro scale. Useful for semiconductor and biology research.
LENGTH📏Picometer to Meter
See exactly how tiny a picometer is compared to a full metre. Great for scale visualizations.
LENGTH📐Ångström to Nanometer
Convert ångströms used in older papers to modern nanometer notation with precision.
LENGTH⚡Femtometer to Picometer
Convert nuclear-scale femtometers to picometers. Used in particle and nuclear physics.
ATOMIC🔎Nanometer to Millimeter
Scale up from nanometers to millimeters for comparing nano-features to everyday objects.
ATOMIC🌀Picometer to Bohr Radii
Convert pm to Bohr radii (a₀) for quantum chemistry and atomic orbital calculations.
ATOMIC📊Picometer to Centimeter
Convert picometers to centimeters — bridging the atomic scale to the human-visible scale.
REFERENCE💫Picometer to Femtometer
Go from atomic-scale to nuclear-scale. Essential for particle physics calculations.
REFERENCE🧪Picometer to Micrometer
Convert pm to µm for transitioning between atomic and microscopic scale measurements.
REFERENCEPopular Conversions
- Femtometers to Picometers
- Femtometers to Ångströms
- Femtometers to Nanometers
- Femtometers to Meters
- Picometers to Femtometers
- Picometers to Ångströms
- Picometers to Nanometers
- Picometers to Micrometers
- Picometers to Millimeters
- Picometers to Centimeters
- Picometers to Meters
- Picometers to Kilometers
- Picometers to Bohr Radii
- Picometers to Inches
- Picometers to Feet
WORKFLOW
How it works
Three simple steps — convert any atomic-scale length unit in seconds.
STEP 11 / 3
Step 1: Enter the number you are stuck on
Type the exact value from your homework or lab report. No need to move decimal places in your head.
How the Math Actually Works
When dealing with subatomic measurements, keeping track of zeros is where most students and engineers make fatal mistakes. Because a picometer (pm) is exactly one-trillionth of a meter (10⁻¹²) and a nanometer (nm) is one-billionth of a meter (10⁻⁹), the math always boils down to powers of three. For a deep dive into how all these prefixes work across the entire metric scale, check out our comprehensive guide on Metric Prefixes Explained: From Giga to Pico.
The Golden Rule: The nanometer is exactly 1,000 times larger than the picometer. This means there are 1,000 picometers packed into a single nanometer.
Scale Diagram: Nanometer vs Picometer
| Unit | Scientific Notation | Scale Relative to Meter |
|---|---|---|
| Micrometer (µm) | 10⁻⁶ m | 1 millionth → nm to µm |
| Nanometer (nm) | 10⁻⁹ m | 1 billionth |
| Ångström (Å) | 10⁻¹⁰ m | 10 billionths → Å to nm |
| Picometer (pm) | 10⁻¹² m | 1 trillionth |
Instead of trying to memorize complex cross-multiplication tables, the easiest and most foolproof method is to understand the metric prefixes: simply divide by 1,000 to convert pm to nm, or move the decimal point three places to the left. If you need to jump to other common units, be sure to use our full suite of calculators.
Picometers (pm) to Nanometers (nm):
Value in nm = Value in pm ÷ 1000
Nanometers (nm) to Picometers (pm):
Value in pm = Value in nm × 1000Example
If a carbon-carbon single bond has a length of 154 pm, converting it to nanometers is as simple as dividing by 1,000. 154 ÷ 1000 = 0.154 nm.
Quick Conversion
1 nm = 1,000 pm
Power Scale
10⁻⁹ m vs 10⁻¹² m
Decimal Shift
Move 3 places left
Ångström Tip
1 Å = 100 pm = 0.1 nm
Worked examples
| Scenario | Calculation | Result |
|---|---|---|
| Hydrogen atom radius (53 pm) → Å and nm | 53 × 10⁻¹² m ÷ 10⁻¹⁰ (Å); ÷ 10⁻⁹ (nm) | 0.53 Å · 0.053 nm |
| Carbon–carbon bond (154 pm) → nm | 154 × 10⁻¹² m ÷ 10⁻⁹ | 0.154 nm (1.54 Å) |
| X-ray wavelength (100 pm) → nm | 100 × 10⁻¹² m ÷ 10⁻⁹ | 0.1 nm (1 Å) |
| Visible light (500 nm) → pm | 500 × 10⁻⁹ m ÷ 10⁻¹² | 500,000 pm (5,000 Å) |
| DNA helix width (2 nm) → pm | 2 × 10⁻⁹ m ÷ 10⁻¹² | 2,000 pm (20 Å) |
Conversion reference
| Picometers (pm) | Femtometers (fm) | Ångströms (Å) | Nanometers (nm) | Meters (m) |
|---|---|---|---|---|
| 1 | 1,000 | 0.01 | 0.001 | 1×10⁻¹² |
| 10 | 10,000 | 0.1 | 0.01 | 1×10⁻¹¹ |
| 100 | 100,000 | 1 | 0.1 | 1×10⁻¹⁰ |
| 1,000 | 1,000,000 | 10 | 1 | 1×10⁻⁹ |
| 10,000 | 10,000,000 | 100 | 10 | 1×10⁻⁸ |
| 100,000 | 100,000,000 | 1,000 | 100 | 1×10⁻⁷ |
| 1,000,000 | 1,000,000,000 | 10,000 | 1,000 | 1×10⁻⁶ |
| 1×10⁹ | 1×10¹² | 10,000,000 | 1,000,000 | 0.001 |
| 1×10¹² | 1×10¹⁵ | 1×10¹⁰ | 1,000,000,000 | 1 |
Quick facts
- 1 pm = 10⁻¹² m. It is exactly one trillionth of a metre.
- A hydrogen atom radius is roughly 53 pm.
- 1 ångström = 100 pm = 0.1 nm. Always remember this for reading older journal papers.
- A typical covalent bond falls between 74 pm and 250 pm.
- Hard X-rays have wavelengths of 10–100 pm. That is why they can see crystal structures.
From the blog
View all →Picotometer vs Nanometer
Confused between picotometers and nanometers? We break down the differences, exactly when to use each, and provide a fool-proof way to convert between them.
Picotometer vs NanometerMetric Prefixes: Converting Giga to Pico
A complete guide to metric conversions from giga to pico. Learn the staircase analogy to master kilo, milli, micro, nano, and pico.
Metric Prefixes: Converting Giga to PicoFrequently asked questions
We throw this word around a lot, but a picometer (pm) is simply 10⁻¹² metres. It is one trillionth of a metre. You use it because at the atomic scale, writing decimals with twelve zeros is a nightmare. It is the perfect scale for atomic radii and chemical bond lengths.
The problem with small metric units is losing track of the zeros. Think of it this way: there are exactly **1,000 picometers in one nanometer**. To go from nm to pm, just multiply by 1,000. It is that simple.
The ångström (Å) equals exactly 100 picometers. It is not an official SI unit, but crystallographers have used it for decades and refuse to stop. If you see 1.54 Å in a textbook, just multiply by 100 to get 154 pm.
Hydrogen, the smallest atom, has a radius of about 53 pm. Larger atoms like carbon sit at roughly 77 pm. The biggest atoms barely scratch 300 pm. So if you are calculating atomic size and get something like 5,000 pm, check your math.
The femtometer (fm) is 10⁻¹⁵ m. You only use femtometers when you are diving into the atomic nucleus itself, which is a fraction of a picometer wide.