Millimeter to Angstrom Converter

Convert millimeters to angstroms with our free online length converter.

Quick Answer

1 Millimeter = 10000000 angstroms

Formula: Millimeter × conversion factor = Angstrom

Use the calculator below for instant, accurate conversions.

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All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026|Reviewed by: Sam Mathew, Software Engineer

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How to Use the Millimeter to Angstrom Calculator:

Enter the value you want to convert in the 'From' field (Millimeter).
The converted value in Angstrom will appear automatically in the 'To' field.
Use the dropdown menus to select different units within the Length category.
Click the swap button (⇌) to reverse the conversion direction.

How to Convert Millimeter to Angstrom: Step-by-Step Guide

Converting Millimeter to Angstrom involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Millimeter = 1.0000e+7 angstroms

Example Calculation:

Convert 10 millimeters: 10 × 1.0000e+7 = 1.0000e+8 angstroms

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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What is a Millimeter and a Angstrom?

The millimeter (symbol: mm) is a unit of length in the metric system equal to one-thousandth of a meter (1/1,000 m) or one-tenth of a centimeter (1/10 cm). It is used for precise measurements in engineering, manufacturing, and everyday applications.

Key relationships:

1 millimeter = 0.001 meters (m)
1 millimeter = 0.1 centimeters (cm)
10 millimeters = 1 centimeter
1,000 millimeters = 1 meter
1 millimeter ≈ 0.03937 inches (about 1/25th inch)
25.4 millimeters = 1 inch (exactly)

The prefix "milli-":

From Latin "mille" meaning "thousand"
SI prefix denoting 10⁻³ (one-thousandth)
Also used in: milligram (mg), milliliter (mL), millisecond (ms)

Visual perspective (how big is it?):

1 mm = Thickness of a credit card
2 mm = Thickness of a US dime
5 mm = Thickness of a pencil lead (mechanical)
10 mm = Width of an adult fingernail
25.4 mm = Exactly one inch

Convert between length units: mm converter

The Angstrom (symbol Å) is a non-SI unit of length equal to exactly 10⁻¹⁰ meters (one ten-billionth of a meter) or 0.1 nanometers (nm). While not part of the modern International System of Units (SI), it remains widely used in various scientific fields due to its convenient scale for atomic and molecular dimensions.

The Angstrom provides a direct way to express sizes at the sub-nanometer level without resorting to fractions or powers of ten. For example, expressing a carbon-carbon bond as "1.54 Å" is more intuitive than "0.154 nm" or "154 pm" for scientists working at the atomic scale.

Relationship to other units:

1 Angstrom = 0.1 nanometers (nm)
1 Angstrom = 100 picometers (pm)
1 Angstrom = 0.0001 micrometers (μm)
10 Angstroms = 1 nanometer
10 billion Angstroms = 1 meter

Special character note: The proper symbol is Å (capital A with a ring above), not simply "A". This distinguishes it from amperes (A) and other uses of the letter A in scientific notation.

Convert Angstroms to Other Units →

Note: The Millimeter is part of the metric (SI) system, primarily used globally in science and trade. The Angstrom belongs to the imperial/US customary system.

History of the Millimeter and Angstrom

Metric System Origins: The millimeter was defined as a subunit of the meter when the metric system was established in France during the late 18th century (1790s). As measurement standardization progressed, the need for decimal subdivisions of the meter became clear.
Industrial Revolution: The millimeter became essential during the 19th century Industrial Revolution as:
- Precision machining required fine tolerances
- Interchangeable parts manufacturing emerged
- Engineering drawings needed standard units
- Technical specifications became international
Engineering Adoption: By the mid-19th century, engineers and machinists worldwide adopted millimeters as the standard for:
- Machine tool specifications
- Tolerance requirements (±0.1 mm common)
- Technical drawing dimensions
- Quality control measurements
Scientific Standardization: The millimeter became standard in scientific research for:
- Laboratory equipment calibration
- Microscopy measurements
- Specimen documentation
- Experimental apparatus dimensions
SI Formalization: When the International System of Units (SI) was established in 1960, the millimeter was confirmed as an official subdivision of the meter, forming part of the coherent decimal system.
Modern Manufacturing: The 20th century saw millimeters become universal in:
- Automotive engineering specifications
- Electronics manufacturing (PCB design)
- Aerospace tolerances
- Medical device specifications
- Consumer product dimensions
Global Standard: Today, millimeters are the primary unit for precision measurements in virtually every country except the United States (which uses both mm and inches). Even in the US, many technical fields have adopted millimeters as standard.

The Angstrom unit is named after the Swedish physicist Anders Jonas Ångström (1814–1874), one of the founders of the science of spectroscopy. Ångström made groundbreaking contributions to understanding electromagnetic radiation and atomic emission spectra.

In 1868, Ångström published a chart of the solar spectrum, expressing the wavelengths of electromagnetic radiation in sunlight as multiples of 10⁻¹⁰ meters. This scale proved extraordinarily convenient for expressing:

Atomic radii (typically 0.5-3 Å)
Chemical bond lengths (typically 1-2 Å)
Wavelengths of X-rays (1-10 Å)
Crystal lattice spacings (2-10 Å)

The Angstrom quickly became the standard unit in crystallography, chemistry, and atomic physics throughout the early 20th century. X-ray crystallography, developed by Max von Laue, William Henry Bragg, and William Lawrence Bragg in the 1910s, relied heavily on Angstrom measurements for determining crystal structures.

When the International System of Units (SI) was established in 1960, the Angstrom was officially deprecated in favor of:

Nanometer (nm) = 10⁻⁹ m (preferred for 0.1-100 nm scales)
Picometer (pm) = 10⁻¹² m (preferred for atomic-scale measurements)

Despite this official change, the Angstrom persists robustly in scientific literature for several reasons:

Historical data: Decades of crystallography and spectroscopy literature use Angstroms
Convenient scale: Atomic dimensions typically fall in the 0.5-5 Å range—easy to work with
Established conventions: Many scientific fields developed their nomenclature around Angstroms
Software and databases: Crystallographic databases (PDB, CIF) often default to Angstroms

Today, you will find Angstroms in:

Protein Data Bank (PDB) files for biomolecular structures
X-ray diffraction data and crystallographic information files (CIF)
Chemistry textbooks for bond lengths and atomic radii
Materials science publications for thin film thickness and surface studies

Learn More About Scientific Units →

Common Uses and Applications: millimeters vs angstroms

Explore the typical applications for both Millimeter (metric) and Angstrom (imperial/US) to understand their common contexts.

Common Uses for millimeters

The millimeter is the standard unit for precise measurements across multiple fields:

Engineering & Machining

Precise measurement requirements for manufacturing, quality control, and technical specifications. Essential for maintaining tolerances in mechanical parts.

Why millimeters in engineering:

Decimal system (easy calculations)
International standard (ISO)
Suitable precision range
Compatible with CNC machinery
Standard drawing units

Applications:

Machine tool specifications
Part tolerances (±0.05 mm common)
Technical drawing dimensions
CAD/CAM software units
Quality inspection reports

Convert for technical work: mm to inches | mm to cm

Technical Design & Drafting

Standard measurement unit for architectural, mechanical, and technical drawings worldwide.

Drawing Standards:

ISO standards use millimeters
Engineering drawings in mm
Architecture plans (many countries)
Product design specifications
Patent drawings (international)

Why mm for drawings:

Eliminates fractions (unlike inches)
Scales easily (1:10, 1:100, etc.)
International communication
CAD software standard

Electronics & PCB Design

Measuring component sizes, trace widths, and circuit board dimensions in electronic manufacturing.

PCB Design:

Trace width: 0.25-1 mm
Component footprints: mm specifications
Hole diameters: 0.6-1.2 mm
Board thickness: 1.6 mm standard
Component spacing: mm grid

Component Specs:

All modern ICs specified in mm
Resistor/capacitor sizes (mm codes)
Connector dimensions
Display module sizes

Meteorology & Climate

Measuring rainfall amounts with precision, essential for weather forecasting, agriculture, and climate research.

Rain Gauges:

Standard measurement unit worldwide
Collected in graduated cylinders (mm scale)
Automated weather stations use mm
Historical records in mm
Climate data standardized

Importance:

Drought assessment
Flood prediction
Agricultural planning
Water resource management
Climate change tracking

Use our mm converter for scientific calculations.

Manufacturing & Quality Control

Inspecting product dimensions and ensuring parts meet specifications within required tolerances.

QC Measurements:

Caliper readings in mm
Micrometer measurements
Coordinate measuring machines (CMM)
Surface profile measurements
Dimensional inspection reports

Industries:

Automotive parts
Aerospace components
Medical devices
Consumer electronics
Precision instruments

Jewelry & Watchmaking

Specifying sizes of gems, watch cases, and jewelry components with precision.

Why jewelers use mm:

International gem standard
Precise size communication
Watch industry standard
Setting specifications
Customer communication

Measurements:

Gemstone dimensions
Ring widths and thicknesses
Watch case diameters
Bracelet link sizes
Clasp dimensions

Medical Measurements

Documenting precise measurements in diagnostics, surgery planning, and treatment monitoring.

Clinical Uses:

Imaging measurements (CT, MRI, X-ray)
Tumor size tracking
Surgical planning
Needle specifications
Medical device dimensions

Why mm in medicine:

International standard
Appropriate precision
Imaging system default
Research compatibility
Treatment standardization

When to Use angstroms

1. Crystallography

Crystallographers use Angstroms as the standard unit for crystal structure determination via X-ray, neutron, or electron diffraction. The spacing between atomic planes (d-spacings) in crystals typically ranges from 1-10 Å, making the Angstrom the natural unit. Crystallographic Information Files (CIF) and crystallography software default to Angstrom units.

Convert Crystal Measurements →

2. Atomic and Molecular Physics

Physicists measuring atomic radii, ionic radii, and atomic orbital sizes use Angstroms because typical atomic dimensions fall in the 0.5-5 Å range. Quantum mechanics calculations often output electron densities and orbital sizes in Angstroms for convenient interpretation.

Convert Atomic Scales →

3. Chemistry and Bond Lengths

Chemists specify molecular structures with bond lengths in Angstroms. Chemical databases, molecular modeling software, and computational chemistry programs (like Gaussian, ORCA, and VASP) typically use Angstrom coordinates. This convention allows for easy comparison across decades of chemical literature.

Calculate Molecular Dimensions →

4. Structural Biology

Protein crystallography and cryo-electron microscopy (cryo-EM) express protein structures in Angstroms. The Protein Data Bank (PDB)—the worldwide repository of 3D biological macromolecular structures—uses Angstroms as the standard coordinate unit. Resolutions of protein structures are also reported in Angstroms (e.g., "2.5 Å resolution").

Convert Protein Measurements →

5. X-ray Spectroscopy

X-ray wavelengths naturally fall in the 0.1-100 Å range, making Angstroms the convenient unit for X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), and synchrotron radiation experiments. Energy-dispersive X-ray spectroscopy (EDS) also references wavelengths in Angstroms.

Compare X-ray Wavelengths →

6. Thin Film Technology

Materials scientists characterize thin films, coatings, and surface layers in Angstroms, particularly for films thinner than 100 Å (10 nm). Atomic layer deposition (ALD), molecular beam epitaxy (MBE), and physical vapor deposition (PVD) processes often specify thicknesses in Angstroms for precision.

Calculate Film Thickness →

7. Surface Science

Surface scientists studying adsorption, catalysis, and surface reconstruction use Angstroms to measure adsorbate heights, surface step heights (typically 2-4 Å), and interlayer spacings. Scanning tunneling microscopy (STM) and atomic force microscopy (AFM) data are often expressed in Angstroms vertically.

Convert Surface Features →

Additional Unit Information

About Millimeter (mm)

How many millimeters are in a centimeter?

There are exactly 10 millimeters (mm) in 1 centimeter (cm).

Conversion:

1 cm = 10 mm
To convert cm to mm: multiply by 10
To convert mm to cm: divide by 10

Examples:

5 cm = 50 mm
2.5 cm = 25 mm
75 mm = 7.5 cm

Memory aid: "Centi-" means 1/100 meter, "milli-" means 1/1,000 meter, so 10 mm = 1 cm.

Use our cm to mm converter for instant conversions.

How many millimeters are in a meter?

There are exactly 1,000 millimeters (mm) in 1 meter (m).

Conversion:

1 m = 1,000 mm
To convert m to mm: multiply by 1,000
To convert mm to m: divide by 1,000

Examples:

0.5 m = 500 mm
1.5 m = 1,500 mm
2,750 mm = 2.75 m

Remember: "Milli-" means one-thousandth, so it takes 1,000 mm to make 1 meter.

Convert: mm to meters | meters to mm

What does 'milli' mean in millimeter?

The prefix 'milli-' denotes one-thousandth (1/1,000).

Meaning:

Comes from Latin "mille" meaning "thousand"
In metric system: milli- = 10⁻³ = 1/1,000
1 millimeter = 1/1,000 of a meter = 0.001 m

Other "milli-" units:

Milligram (mg) = 1/1,000 gram
Milliliter (mL) = 1/1,000 liter
Millisecond (ms) = 1/1,000 second
Milliamp (mA) = 1/1,000 ampere

Pattern: Always divide by 1,000 to get the base unit.

How thick is 1 millimeter?

1 millimeter is very thin - about the thickness of:

Common objects:

Credit card: 0.76 mm (slightly thinner)
US dime: 1.35 mm (slightly thicker)
10 sheets of paper: ~1 mm
Paperclip wire: ~1 mm diameter
Mechanical pencil lead (0.7mm): Slightly thinner

Visual comparison:

Thinner than a US penny (1.55 mm)
About 1/25th of an inch (0.04 inches)
10 millimeters = 1 cm = width of fingernail

To visualize: Look at the edge of a credit card - that's less than 1 mm.

How many mm in an inch?

1 inch = 25.4 millimeters exactly (by international agreement).

This is a defined conversion (not an approximation):

1 inch ≡ 25.4 mm (exact)
1 mm = 1/25.4 inch ≈ 0.03937 inches

Common conversions:

1 inch = 25.4 mm
2 inches = 50.8 mm
3 inches = 76.2 mm
4 inches = 101.6 mm
12 inches (1 foot) = 304.8 mm

Reverse examples:

10 mm ≈ 0.394 inches
25 mm ≈ 0.984 inches (almost 1 inch)
50 mm ≈ 1.969 inches (almost 2 inches)

Memory trick: 25 mm is almost 1 inch (close enough for quick estimates).

Use our inch to mm converter for precise conversions.

What is 10mm in real life?

10 millimeters = 1 centimeter - about the width of an adult fingernail.

Common 10mm objects:

Fingernail width (adult index finger)
AA battery diameter: 14 mm (close)
Small marble: ~10-15 mm diameter
M10 bolt diameter: 10 mm
Thick cardboard: ~10 mm

Comparisons:

Just under 0.4 inches (0.394 inches exactly)
Thickness of 100 sheets of paper
About 3/8 inch (slightly larger)

In measurements:

Camera/phone thickness: Often 7-10 mm
Watch case thickness: Often 10-12 mm
Pencil diameter: ~7-8 mm (10mm would be thick)

How do you read a metric ruler?

Metric rulers are divided into centimeters (cm) and millimeters (mm):

Reading steps:

Large numbers: Centimeters (0, 1, 2, 3...)
Long lines: Each centimeter mark
Short lines: Millimeters (10 per cm)
Count: From zero to your measurement point

Example reading:

Between 3 and 4 cm, at the 7th small line = 3.7 cm or 37 mm
At the 15th cm mark = 15 cm or 150 mm

Tips:

10 small marks = 1 cm
Each small mark = 1 mm
Halfway between cm marks = 5 mm
Read to nearest 0.5 mm for precision

Reporting:

Small objects: Use mm (e.g., "15 mm")
Larger objects: Use cm (e.g., "15.5 cm")
Both are correct, choose clearer one

What tools measure millimeters?

Many tools measure in millimeters:

Hand Tools:

Metric ruler: Basic measurement to 1 mm
Metric tape measure: Construction/carpentry
Caliper: Precision to 0.01 mm (digital/vernier)
Micrometer: Very precise, to 0.001 mm
Depth gauge: Measuring depths and heights

Digital Tools:

Digital caliper: Easy reading, 0.01 mm precision
Laser distance meter: Millimeter accuracy
Height gauge: Vertical measurements
Coordinate measuring machine (CMM): Industrial precision

Specialized Tools:

Feeler gauge: Thin strips in mm thicknesses
Thread gauge: Checking thread pitch (mm)
Bore gauge: Internal diameter measurement
Pin gauge: Precision hole measurement

Which to use:

Ruler: General purpose (±0.5 mm)
Caliper: Precision work (±0.01 mm)
Micrometer: Very tight tolerances (±0.001 mm)

Is mm smaller than cm?

Yes, millimeters (mm) are smaller than centimeters (cm).

Relationship:

1 cm = 10 mm
1 mm = 0.1 cm
Millimeter is 10 times smaller than centimeter

Scale comparison:

Largest: meter (m)
Middle: centimeter (cm) = 1/100 m
Smallest: millimeter (mm) = 1/1,000 m

Visual:

Width of fingernail: 1 cm = 10 mm
Thickness of dime: 1.35 mm (can't easily express in cm)

When to use each:

Use mm: Small, precise measurements (< 100 mm)
Use cm: Medium measurements (1-100 cm)
Use m: Large measurements (> 1 meter)

Example:

Pencil length: 19 cm or 190 mm (19 cm clearer)
Wire diameter: 2 mm (not 0.2 cm - awkward)

How much rain is 1mm?

1 millimeter of rain means 1 mm depth of water would cover a flat surface if none drained away.

What it means:

1 mm rain = 1 liter per square meter of water
Light drizzle might produce 1-2 mm/hour
Barely enough to wet the ground thoroughly

Rain intensity scale:

Trace-1 mm: Very light drizzle
1-2 mm: Light rain
2-5 mm: Light to moderate rain
5-10 mm: Moderate rain
10-20 mm: Heavy rain
20-50 mm: Very heavy rain
>50 mm: Extreme rainfall (per hour)

Practical impact:

1 mm: Barely wets surfaces
10 mm: Significant watering
25 mm: Heavy rain event
100 mm: Major storm (in 24 hours)

Measurement:

Rain gauge collects water
Depth measured in mm
Standard worldwide for weather reporting

About Angstrom (Å)

How many Angstroms are in a meter?

There are 10,000,000,000 (ten billion) Angstroms in one meter (1 m = 10¹⁰ Å). Conversely, 1 Angstrom = 10⁻¹⁰ meters.

To visualize this enormous number: if you lined up 10 billion atoms side by side (each about 1 Å in radius), they would span approximately 1 meter.

Examples:

1 meter = 10,000,000,000 Å
1 millimeter = 10,000,000 Å
1 micrometer = 10,000 Å
1 nanometer = 10 Å

Convert Angstroms to Meters →

How many Angstroms are in a nanometer?

There are exactly 10 Angstroms (Å) in one nanometer (nm). Therefore, 1 Å = 0.1 nm.

This 10:1 ratio makes conversions straightforward:

1 nm = 10 Å
5 nm = 50 Å
0.5 nm = 5 Å
0.15 nm = 1.5 Å

Memory trick: Think "A nanometer is 10 Angstroms" (the number 10 is hidden in "ten").

Convert Angstroms to Nanometers →

Is the Angstrom an SI unit?

No, the Angstrom is not part of the International System of Units (SI). The official SI unit for length at this scale is:

Nanometer (nm) = 10⁻⁹ m (for 0.1-1000 nm scales)
Picometer (pm) = 10⁻¹² m (for atomic-scale measurements)

Relationship: 1 Å = 0.1 nm = 100 pm

The SI system officially deprecated the Angstrom in 1960, but it remains widely used in crystallography, chemistry, and physics due to historical convention and its convenient scale for atomic dimensions.

Explore SI Length Units →

Why is the Angstrom still used if it is not an SI unit?

The Angstrom persists due to:

1. Historical Convention: Decades of scientific literature (1868-present) use Angstroms. Converting all historical data would be impractical.

2. Convenient Scale: Atomic radii typically range from 0.5-3 Å—easy whole numbers. In nanometers, these become 0.05-0.3 nm (more decimal places).

3. Established Databases: Major scientific databases default to Angstroms:

Protein Data Bank (PDB): all coordinates in Angstroms
Crystallographic Information Files (CIF): lattice parameters in Angstroms
Chemical structure databases: bond lengths in Angstroms

4. Software Defaults: Most crystallography and molecular modeling software uses Angstroms as the default unit.

5. Intuitive Communication: Saying "1.5 Angstroms" is often clearer than "150 picometers" or "0.15 nanometers" in research discussions.

What fields commonly use Angstroms?

The Angstrom remains common in:

Primary fields:

Crystallography: X-ray, neutron, and electron diffraction for crystal structure determination
Structural Biology: Protein and nucleic acid structure determination (PDB files)
Chemistry: Molecular geometry, bond lengths, and computational chemistry
Atomic Physics: Atomic radii, orbital sizes, and spectroscopy

Secondary fields:

Materials Science: Thin films, surface science, and nanostructures
Spectroscopy: X-ray wavelengths and absorption spectra
Microscopy: Electron microscopy and scanning probe microscopy
Semiconductor Physics: Historical or informal references to feature sizes

Compare Different Scientific Units →

How do you type the Angstrom symbol (Å)?

Typing the proper Angstrom symbol Å varies by platform:

Windows:

Hold Alt and type 0197 on numeric keypad: Å
Or use Character Map application

Mac:

Option + Shift + A: Å

Linux:

Compose key + A + A: Å
Or Ctrl + Shift + U, then type 00C5, then Enter

HTML/Web:

HTML entity: Å → Å
Unicode: Å → Å

LaTeX:

\AA or \r{A} → Å

Microsoft Word:

Insert → Symbol → select Å
Or AutoCorrect: type (A) and it may convert automatically

If the symbol is unavailable, write "Angstrom" or abbreviate as "Ang" in informal contexts.

What is the difference between Angstrom and picometer?

An Angstrom (Å) equals 10⁻¹⁰ meters, while a picometer (pm) equals 10⁻¹² meters. This means 1 Angstrom = 100 picometers.

Scale comparison:

Angstrom scale: atomic radii, bond lengths (0.5-5 Å = 50-500 pm)
Picometer scale: ultra-precise bond length measurements, nuclear radii

Examples:

Hydrogen atom radius: 0.53 Å = 53 pm
C-H bond length: 1.09 Å = 109 pm
C-C single bond: 1.54 Å = 154 pm

Usage differences:

Angstroms: Traditional in chemistry and crystallography (though not SI-compliant)
Picometers: Official SI unit, required by some journals and standards bodies

Many scientists prefer Angstroms for convenience (whole numbers), while formal SI publications require picometers or nanometers.

Convert Angstroms to Picometers →

How is Angstrom used in protein crystallography?

In protein crystallography, the Angstrom is the standard unit for:

1. Atomic Coordinates: PDB files list x, y, z coordinates of every atom in Angstroms.

2. Resolution: The quality of diffraction data is expressed in Angstroms:

High resolution: <1.5 Å (individual atoms clearly visible)
Medium resolution: 1.5-3.0 Å (backbone and side chains visible)
Low resolution: >3.0 Å (overall fold visible, details limited)

3. Bond Lengths: Standard bond lengths used for structure refinement:

C-C: 1.54 Å
C-N: 1.47 Å
C-O: 1.43 Å

4. Crystal Lattice: Unit cell dimensions (a, b, c axes) are given in Angstroms, typically 50-200 Å.

5. B-factors: Atomic displacement parameters are in Ų (square Angstroms).

Example: "The structure was solved at 2.1 Å resolution with unit cell dimensions a=62.3 Å, b=78.5 Å, c=91.2 Å."

Convert Crystallography Units →

Can I convert Angstroms to inches?

Yes, but it is extremely impractical. Angstroms measure atomic scales, while inches measure everyday objects—a difference of 10 billion!

Conversion: 1 Angstrom = 3.937 × 10⁻⁹ inches (about 0.000000004 inches)

Or inversely: 1 inch = 254,000,000 Å (254 million Angstroms)

Example: A carbon atom with radius 0.77 Å = 0.000000003 inches. This is why scientists use metric units—Angstroms, nanometers, and picometers are far more practical for atomic-scale work.

Convert Angstroms to Practical Units →

Why is it called Angstrom and not Ångström?

The English spelling "Angstrom" is a simplified version of the Swedish name "Ångström" to accommodate keyboards and alphabets without special characters.

Proper Swedish spelling: Anders Jonas Ångström (with the Swedish letter "Å")

Common variations:

Angstrom (English, without diacritics)
Ångström (Swedish/original spelling)
Ångstrom (mixed form)

All refer to the same unit and the same physicist. The symbol Å remains universal across languages, representing both the unit and the first letter of Ångström's name (with the ring above).

In scientific writing, either "Angstrom" or "Ångström" is acceptable, though the simplified "Angstrom" is more common in English-language publications.

Conversion Table: Millimeter to Angstrom

Millimeter (mm)	Angstrom (Å)
0.5	5,000,000
1	10,000,000
1.5	15,000,000
2	20,000,000
5	50,000,000
10	100,000,000
25	250,000,000
50	500,000,000
100	1,000,000,000
250	2,500,000,000
500	5,000,000,000
1,000	10,000,000,000

How do I convert Millimeter to Angstrom?

To convert Millimeter to Angstrom, enter the value in Millimeter in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our length converter page to convert between other units in this category.

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What is the conversion factor from Millimeter to Angstrom?

The conversion factor depends on the specific relationship between Millimeter and Angstrom. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Angstrom back to Millimeter?

Yes! You can easily convert Angstrom back to Millimeter by using the swap button (⇌) in the calculator above, or by visiting our Angstrom to Millimeter converter page. You can also explore other length conversions on our category page.

Learn more →

What are common uses for Millimeter and Angstrom?

Millimeter and Angstrom are both standard units used in length measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our length converter for more conversion options.

For more length conversion questions, visit our FAQ page or explore our conversion guides.

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