Shaku (Japanese) to Arpent Conversion Calculator: Free Online Tool
Convert shaku to arpents with our free online length converter.
Shaku (Japanese) to Arpent Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Shaku (Japanese)).
- The converted value in Arpent 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 Shaku (Japanese) to Arpent
Converting Shaku (Japanese) to Arpent involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Shaku (Japanese) = 0.00518206 arpentsExample Calculation:
Convert 10 shaku: 10 × 0.00518206 = 0.0518206 arpents
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.
What is a Shaku (Japanese) and a Arpent?
The Shaku (尺) is a traditional Japanese unit of length, forming a fundamental part of the traditional Japanese system of weights and measures known as the Shakkanhō (尺貫法). It is roughly equivalent to the English foot, although slightly shorter in its modern standardized form.
The Shaku is traditionally subdivided and multiplied decimally:
- 1 Jō (丈) = 10 Shaku
- 1 Shaku (尺) = 10 Sun (寸 - Japanese inch)
- 1 Sun (寸) = 10 Bu (分 - Japanese line)
There were historically different types of shaku, most notably the standard kanejaku (曲尺) used in carpentry and the longer kujirajaku (鯨尺) used for measuring cloth. Unless otherwise specified, "shaku" usually refers to the kanejaku.
The Arpent is a historical French unit used primarily for measuring land area, but also sometimes used as a unit of length. As a unit of length, the arpent typically referred to the side length of a square arpent of land.
Its precise length varied significantly by region and time period in France and its colonies. A commonly cited value, particularly associated with the arpent de Paris, is based on 180 French feet (pieds du Roi), which equates to approximately:
- 58.47 meters (m)
- 191.8 feet (ft)
Other variations existed, such as the arpent commun (based on 200 French feet, ~64.97 m) and the arpent d'ordonnance (based on 220 French feet, ~71.47 m).
Note: The Shaku (Japanese) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Arpent belongs to the imperial/US customary system.
History of the Shaku (Japanese) and Arpent
The Shaku originated from the Chinese Chi (尺), introduced to Japan likely between the 3rd and 6th centuries AD. Like its Chinese counterpart, the length of the Shaku varied considerably across different historical periods and regions in Japan.
- Early Adoption: Early Japanese measurements were heavily influenced by Chinese standards, but the length of the Shaku began to diverge over time.
- Edo Period (1603–1868): Different standards coexisted, including the kanejaku (carpenter's shaku) and the kujirajaku (cloth shaku, literally "whale shaku," possibly referring to rulers made from whale baleen). The kanejaku became the more common standard for general measurement.
- Meiji Restoration (1868 onwards): Japan began modernizing and standardizing its systems. In 1891, the Weights and Measures Act defined the standard Shaku (kanejaku) legally in relation to the metric system as exactly 10/33 of a meter. This aimed to provide a precise conversion factor while preserving the traditional unit. The kujirajaku was defined as 1.25 times the kanejaku (i.e., 12.5/33 of a meter).
- Metrication: Japan officially adopted the metric system in 1951, and its use became mandatory for most official and commercial transactions by 1966. However, the Shaku and other Shakkanhō units remain in use in specific traditional fields.
The term "arpent" likely derives from the Gaulish arepennis, meaning "end of a field," suggesting its origins relate to agricultural land measurement, possibly representing the amount of land that could be plowed in a day. It became a fundamental unit for land surveying in France during the medieval period and remained in use until the adoption of the metric system following the French Revolution.
- Regional Variations: Before standardization efforts, the length (and thus area) of the arpent varied considerably across different regions of France. Key variations included:
- Arpent de Paris: Based on a perche (rod) of 18 pieds du Roi (French feet), with the linear arpent (side of the square) being 10 perches, totaling 180 pieds (~58.47 m). The area was 32,400 square pieds.
- Arpent Commun: Based on a perche of 20 pieds, linear arpent of 200 pieds (~64.97 m). Area: 40,000 square pieds.
- Arpent d'Ordonnance (or Arpent des Eaux et Forêts): Based on a perche of 22 pieds, linear arpent of 220 pieds (~71.47 m). Area: 48,400 square pieds. Used primarily for royal forests.
- Colonial Usage: The arpent was exported to French colonies, notably:
- New France (Quebec, Canada): The arpent de Paris became the standard for land grants along the St. Lawrence River, shaping the characteristic long, narrow farm plots (rangs).
- Louisiana (USA): The French arpent (usually the arpent de Paris) was used for land measurement before and sometimes after the Louisiana Purchase. Its legacy persists in land titles and some place names.
- Metrication: The metric system officially replaced the arpent and other traditional units in France in the late 18th and early 19th centuries, though its use lingered in practice and historical records.
Common Uses for shaku and arpents
Explore the typical applications for both Shaku (Japanese) (imperial/US) and Arpent (imperial/US) to understand their common contexts.
Common Uses for shaku
While the metric system is standard in Japan, the Shaku persists in several areas:
- Traditional Japanese Architecture and Carpentry: The kanejaku is still widely used for measurements in building temples, shrines, traditional houses, and making furniture. Architectural modules like the ken (間) are often based on the Shaku. Japanese woodworking tools are often sized or marked in Shaku and Sun.
- Kimono and Traditional Clothing: The kujirajaku is the standard unit for measuring cloth width (tanmono) and dimensions when making kimonos and yukatas.
- Traditional Crafts: Used in making items like tatami mats, shōji screens, and other traditional crafts where historical dimensions are important.
- Musical Instruments: The length of traditional Japanese instruments, notably the shakuhachi (尺八) flute, is measured in Shaku and Sun (its name literally means "1.8 shaku").
- Martial Arts: Some traditional martial arts (koryū budō) may use Shaku-based measurements for weapon lengths (e.g., jō, bō) or stance dimensions.
- Gardening and Landscaping: Traditional Japanese garden design sometimes employs Shaku-based proportions.
- Historical and Cultural Context: Essential for understanding dimensions in historical texts, art, and artifacts.
Common Uses for arpents
The Arpent (both linear and area) is now largely obsolete for practical measurement but remains historically significant:
- Historical Land Surveys: Essential for interpreting old maps, deeds, and land grants in France, Quebec, Louisiana, and other areas formerly under French control (e.g., parts of the US Midwest like Missouri, Illinois, Indiana).
- Legal Context: Land descriptions in some regions may still reference original measurements in arpents, requiring conversion for modern understanding.
- Historical Research: Understanding the arpent is crucial for historians studying agriculture, settlement patterns, and land tenure systems in French history and its colonial contexts.
- Unit of Area: While this page focuses on the length, the arpent is more commonly known and encountered as a unit of area (the square arpent).
Frequently Asked Questions
Questions About Shaku (Japanese) (shaku)
How long is a Shaku?
The length depends on the context (historical vs. modern, type of shaku):
- Modern Standardized Kanejaku (since 1891):
- Exactly 10/33 meters (m)
- Approximately 0.30303 meters
- Approximately 30.303 centimeters (cm)
- Approximately 11.93 inches (in)
- Approximately 0.994 feet (ft)
- Modern Standardized Kujirajaku:
- Exactly 12.5/33 meters (m) (1.25 times the kanejaku)
- Approximately 0.37879 meters
- Approximately 37.879 centimeters (cm)
- Approximately 14.91 inches (in)
- Approximately 1.243 feet (ft)
- Historical Shaku: Varied significantly, often differing from the modern standard.
What are the subdivisions and multiples of the Shaku?
The system is decimal:
- Subdivisions: 1 Shaku = 10 Sun (寸); 1 Sun = 10 Bu (分).
- Multiples: 1 Jō (丈) = 10 Shaku. Another related unit is the Ken (間), traditionally 6 Shaku, though its length could vary.
Is it the same as the Chinese Chi?
No. Although the Japanese Shaku originated from the Chinese Chi (both written with the character 尺), they evolved independently and have different standardized lengths today.
- Modern Japanese Shaku (kanejaku): 10/33 meters (≈ 0.303 m)
- Modern Chinese Chi: 1/3 meter (≈ 0.333 m) The Shaku is noticeably shorter than the modern Chi.
What is the difference between kanejaku and kujirajaku?
They are two distinct traditional Shaku units:
- Kanejaku (曲尺): The "carpenter's shaku," used for general measurement, architecture, and woodworking. Standardized at 10/33 meters. This is the default meaning of "Shaku."
- Kujirajaku (鯨尺): The "cloth shaku" or "whale shaku," used primarily for measuring cloth, especially for kimonos. It is longer than the kanejaku, standardized at 12.5/33 meters (exactly 1.25 times the kanejaku).
Is the Shaku an SI unit?
No, the Shaku is not an SI unit. It is a traditional Japanese unit belonging to the Shakkanhō system. The SI base unit for length is the meter (m).
Is the Shaku still used today?
Yes, although Japan officially uses the metric system (SI units) for most purposes, the Shaku (both kanejaku and kujirajaku) continues to be used in specific traditional fields:
- Traditional architecture and carpentry.
- Kimono making and textile measurement.
- Other traditional crafts.
- Musical instrument making (e.g., shakuhachi).
- Historical and cultural studies. It is generally not used in everyday commerce or scientific contexts.
About Arpent (arpent)
Is the Arpent a unit of length or area?
The Arpent is primarily known as a unit of area, representing a specific parcel of land. However, a linear arpent also exists, defined as the side length of a square whose area is one arpent. This page focuses on the linear arpent. The relationship is direct: Area Arpent = (Linear Arpent)². Because the linear arpent varied, the area also varied.
Where is the Arpent still relevant?
The Arpent is not used for everyday measurements today. Its relevance is almost entirely historical and legal:
- Quebec (Canada): Crucial for understanding historical land division and property lines, especially the seigneurial system.
- Louisiana (USA): Important for interpreting land titles dating back to the French colonial period.
- France: Relevant for historical studies and understanding old documents.
- Other former French territories: May appear in historical records (e.g., Mauritius, parts of the US Midwest).
How long is a linear Arpent?
There is no single value, as it varied regionally. Common historical values include:
- Arpent de Paris: ~180 French feet ≈ 58.47 meters ≈ 191.8 feet (Most common in Quebec & Louisiana)
- Arpent Commun: ~200 French feet ≈ 64.97 meters ≈ 213.2 feet
- Arpent d'Ordonnance: ~220 French feet ≈ 71.47 meters ≈ 234.5 feet (Note: The French foot, pied du Roi, was slightly longer than the English foot, approx. 32.48 cm or 12.79 inches).
How does the linear Arpent compare to a Meter or Foot?
- The most common linear arpent (~58.47 m) is significantly longer than a meter. (1 Arpent ≈ 58.47 m)
- It is also much longer than a foot. (1 Arpent ≈ 191.8 ft)
Is the Arpent an SI unit?
No, the Arpent is not an SI unit. It is a traditional unit from the French system of measurements. The SI base unit for length is the meter (m), and the SI unit for area is the square meter (m²).
Conversion Table: Shaku (Japanese) to Arpent
| Shaku (Japanese) (shaku) | Arpent (arpent) |
|---|---|
| 1 | 0.005 |
| 5 | 0.026 |
| 10 | 0.052 |
| 25 | 0.13 |
| 50 | 0.259 |
| 100 | 0.518 |
| 500 | 2.591 |
| 1,000 | 5.182 |
All Length Conversions
Other Units from Length
- Meter (m)
- Kilometer (km)
- Hectometer (hm)
- Decimeter (dm)
- Centimeter (cm)
- Millimeter (mm)
- Inch (in)
- Foot (ft)
- Yard (yd)
- Mile (mi)
- Nautical Mile (NM)
- Micrometer (μm)
- Nanometer (nm)
- Light Year (ly)
- Astronomical Unit (AU)
- Parsec (pc)
- Angstrom (Å)
- Point (Typography) (pt)
- Mil/Thou (mil)
- Fathom (fath)
- Furlong (fur)
- Link (Gunter's) (li)
- Pace (pace)
- Span (span)
- Digit (digit)
- Cable Length (cb)
- Ell (ell)
- Finger (finger)
- Roman Mile (m.p.)
- Stadion (stadion)
- Chi (Chinese) (chi)
- Li (Chinese) (li)
- Toise (toise)
- Bolt (bolt)
- Rope (rope)
- Smoot (smoot)
- Sajene (sajene)
- Ken (ken)
- Wa (wa)
- Vara (vara)
- Aln (aln)
- Cubit (Royal/Egyptian) (cubit)
- Versta (versta)
- Ri (Japanese) (ri)
- Klafter (klafter)
- Yojana (yojana)
- Skein (skein)