Decimeter to Aln Converter
Convert decimeters to alnar with our free online length converter.
Quick Answer
1 Decimeter = 0.16835 alnar
Formula: Decimeter × conversion factor = Aln
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.
Decimeter to Aln Calculator
How to Use the Decimeter to Aln Calculator:
- Enter the value you want to convert in the 'From' field (Decimeter).
- The converted value in Aln 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 Decimeter to Aln: Step-by-Step Guide
Converting Decimeter to Aln involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Decimeter = 0.16835 alnarExample Calculation:
Convert 10 decimeters: 10 × 0.16835 = 1.683502 alnar
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.
Need to convert to other length units?
View all Length conversions →What is a Decimeter and a Aln?
The decimeter (symbol: dm) is a unit of length in the metric system. It is defined as exactly one-tenth (1/10) of a meter, which is the base unit of length in the International System of Units (SI). Therefore, 1 meter equals 10 decimeters.
The Aln (Swedish), Alen (Danish and Norwegian) was a traditional Scandinavian unit of length, analogous to the English ell or cubit. Its length varied significantly by region and time but was generally based on the length of the forearm.
Key standardized or common values include:
- Swedish Aln: Officially standardized (as the Rydaholmsaln) in 1665 and confirmed in 1735 as exactly 2 Swedish fot (feet). This equates to approximately 0.5938 meters (or 59.38 cm / 23.38 inches).
- Danish Alen: The common standard (Sjællandsk alen) was 2 Danish fod (feet), equating to approximately 0.6277 meters (or 62.77 cm / 24.71 inches).
- Norwegian Alen: Often followed the Danish standard due to political union. After 1824, it was legally defined as 2 Norwegian fot, equating to 0.6275 meters (or 62.75 cm / 24.70 inches), very close to the Danish value.
The Aln/Alen was typically subdivided into 4 kvarter (quarters).
Note: The Decimeter is part of the metric (SI) system, primarily used globally in science and trade. The Aln belongs to the imperial/US customary system.
History of the Decimeter and Aln
The decimeter originates from the French Revolution era, when the metric system was developed and introduced in France in the 1790s. The system aimed to create a rational and universal standard of measurement based on decimal multiples and submultiples of base units. The prefix "deci-" signifies a factor of one-tenth (10⁻¹). While the meter became the standard, the decimeter was defined as a convenient subdivision.
The Aln/Alen originates from the Proto-Germanic word for forearm (alinō), reflecting its basis as an anthropomorphic unit, similar to the cubit in other cultures. For centuries, its length was inconsistent, varying between regions, cities, and trades within Sweden, Denmark, and Norway.
- Early Variations: Numerous local standards existed, often based on physical rods kept by authorities or guilds.
- Standardization Efforts:
- Sweden: Attempts at standardization culminated in the adoption of the Rydaholmsaln (based on a specific iron standard bar from Rydaholm church) in 1665, defined as 2 fot. This standard (≈0.5938 m) became mandatory nationwide in 1735.
- Denmark & Norway: The Sjællandsk alen (Zealand ell, ≈0.6277 m) became the dominant standard in Denmark and, consequently, in Norway during their union. Norway later formally adopted a slightly different value (≈0.6275 m) based on its own fot definition in 1824.
- Metrication: The Aln/Alen was officially replaced by the metric system during the 19th and early 20th centuries: Norway in 1875, Sweden in 1889, and Denmark in 1907.
Common Uses and Applications: decimeters vs alnar
Explore the typical applications for both Decimeter (metric) and Aln (imperial/US) to understand their common contexts.
Common Uses for decimeters
Although less frequently used in everyday measurements compared to the meter, centimeter, or millimeter, the decimeter finds application in certain contexts:
- Education: Often used in schools to teach the metric system and decimal relationships (10 dm = 1 m, 1 dm = 10 cm).
- Crafts and Sewing: Sometimes used for measuring fabric or materials where increments of 10 centimeters are practical.
- Scientific Fields: Occasionally used in specific scientific measurements or contexts where this scale is convenient.
- Volume: The cubic decimeter (dm³) is a very common unit of volume, as it is exactly equal to one liter (L). This link makes the decimeter conceptually important in understanding metric volume.
When to Use alnar
Historically, the Aln/Alen was a fundamental unit for everyday trade and craft:
- Textiles: Its most prominent use was measuring cloth (wool, linen, silk). Standardization was often driven by the textile trade.
- Timber and Lumber: Measuring lengths of wood.
- Rope and Cordage: Measuring lengths of rope.
- Construction: Used in building measurements, though perhaps less formally than in trade.
- General Trade: Measuring various goods sold by length.
It was less commonly used for land surveying, where units like the stång (rod) or mil (mile) were preferred.
Additional Unit Information
About Decimeter (dm)
How many decimeters are in a meter?
There are exactly 10 decimeters in 1 meter.
How many centimeters are in a decimeter?
There are exactly 10 centimeters in 1 decimeter.
How many millimeters are in a decimeter?
There are exactly 100 millimeters in 1 decimeter (since 1 dm = 10 cm and 1 cm = 10 mm).
How do you convert decimeters to inches?
To convert decimeters to inches, multiply the number of decimeters by approximately 3.93701. For example, 2 dm is about 2 * 3.93701 = 7.874 inches.
Is the decimeter commonly used?
The decimeter is not as commonly used in everyday language or general measurements as meters, centimeters, or even millimeters. However, it is a standard metric unit and is particularly important conceptually due to the cubic decimeter being equal to a liter.
What is a cubic decimeter?
A cubic decimeter (dm³) is a unit of volume equal to the volume of a cube with sides one decimeter (10 cm) long. It is exactly equivalent to 1 liter (L).
About Aln (aln)
How long is an Aln/Alen?
There isn't one single value, as it depended on the country and era. The main official standards were:
- Swedish Aln: ~0.594 meters / ~23.4 inches
- Danish Alen: ~0.628 meters / ~24.7 inches
- Norwegian Alen: ~0.628 meters / ~24.7 inches (very close to Danish)
Always consider the context (Swedish, Danish, or Norwegian) when encountering this unit in historical documents.
What's the difference between the Aln in different countries?
The primary difference was length:
- The Swedish Aln (≈59.4 cm) was noticeably shorter than the Danish and Norwegian Alen (both ≈62.8 cm).
- All were typically defined as 2 local fot (feet), but the length of the fot itself varied between the countries.
Is the Aln related to the English Ell?
Yes, both the Aln/Alen and the English Ell are historical units of length derived from the concept of the cubit or forearm length (Latin ulna). However, their standardized lengths differed significantly. The most common English Ell was 45 inches (1.143 m), much longer than any standard Scandinavian Aln/Alen.
Is the Aln/Alen still used today?
No, the Aln/Alen is obsolete. It was officially replaced by the meter in Sweden, Denmark, and Norway during the metrication process in the late 19th and early 20th centuries. Its use today is purely historical.
Is the Aln an SI unit?
No, the Aln/Alen is not an SI unit. It is a traditional unit from the historical Scandinavian systems of measurement. The SI base unit for length is the meter (m).
Conversion Table: Decimeter to Aln
| Decimeter (dm) | Aln (aln) |
|---|---|
| 0.5 | 0.084 |
| 1 | 0.168 |
| 1.5 | 0.253 |
| 2 | 0.337 |
| 5 | 0.842 |
| 10 | 1.684 |
| 25 | 4.209 |
| 50 | 8.418 |
| 100 | 16.835 |
| 250 | 42.088 |
| 500 | 84.175 |
| 1,000 | 168.35 |
People Also Ask
How do I convert Decimeter to Aln?
To convert Decimeter to Aln, enter the value in Decimeter 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.
Learn more →What is the conversion factor from Decimeter to Aln?
The conversion factor depends on the specific relationship between Decimeter and Aln. 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 Aln back to Decimeter?
Yes! You can easily convert Aln back to Decimeter by using the swap button (⇌) in the calculator above, or by visiting our Aln to Decimeter converter page. You can also explore other length conversions on our category page.
Learn more →What are common uses for Decimeter and Aln?
Decimeter and Aln 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.
Helpful Conversion Guides
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Verified Against Authority Standards
All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.
National Institute of Standards and Technology — Official US standards for length measurements
Bureau International des Poids et Mesures — International System of Units official documentation
Last verified: February 19, 2026