What is the long reed unit?

The long reed is a traditional and now obsolete length unit used mainly in historical land measurement and surveys, with its exact length varying by location and period.

What does the ken measure?

The ken is a traditional Japanese unit of length used in architecture, standardized as approximately 1.818 meters, representing the spacing between pillars or modular building dimensions.

Why is converting long reed to ken useful?

It allows translation of historical European or British surveying measurements into Japanese architectural units, aiding restoration, research, and integration of cross-cultural data.

How to Convert from Long reed to Ken?

Learn how to convert measurements from the traditional long reed unit to the Japanese ken unit with this online length converter tool. Ideal for historical research, architectural restoration, and land surveying.

Long reed

Ken

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Long reed to Ken Conversion Table

Long reed	Ken

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Long reed to Ken Conversion Table
Long reed	Ken

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What Is This Tool?

This tool converts length values from the traditional long reed, an obsolete unit historically used in land measurement, into ken, a traditional Japanese unit commonly used in architecture and building layouts. It supports those working with historical documents, restoration projects, or traditional construction data.

How to Use This Tool?

Enter the measurement value in long reed you wish to convert
Select 'long reed' as the input unit and 'ken' as the output unit
Click on the convert button to view the equivalent length in ken
Use the converted result for historical analysis, architectural planning, or land surveying references

Key Features

Converts from the long reed, a legacy length unit, to the ken, a Japanese architectural unit
Uses the standardized conversion rate of 1 Long reed = 1.5107913669 Ken
Supports historical and cross-cultural measurement translation
Browser-based and easy to use with no installation required
Ideal for researchers, architects, and surveyors working with traditional units

Examples

2 Long reeds convert to 3.0215827338 Ken (2 × 1.5107913669)
5 Long reeds convert to 7.5539568345 Ken (5 × 1.5107913669)

Common Use Cases

Translating historical land documents measured in long reeds to traditional Japanese architectural units
Restoring old surveying measurements for property boundary and heritage architecture projects
Studying traditional measurement systems and modular building layouts in Japan

Tips & Best Practices

Verify the historical context and locality of the long reed when converting to ensure appropriate accuracy
Use supplementary sources when working on legal or engineering applications requiring precision
Be aware of minor regional differences in the ken's size when applying results in architectural restorations
Consider the modular nature of ken in traditional Japanese construction for effective use of converted data

Limitations

The long reed’s length varied by region and time; a single conversion rate may not be universally precise
The ken is standardized approximately and might have small variations depending on traditional practice
For critical technical or legal purposes, original measurement context should be confirmed with additional data

Frequently Asked Questions

What is the long reed unit?: The long reed is a traditional and now obsolete length unit used mainly in historical land measurement and surveys, with its exact length varying by location and period.
What does the ken measure?: The ken is a traditional Japanese unit of length used in architecture, standardized as approximately 1.818 meters, representing the spacing between pillars or modular building dimensions.
Why is converting long reed to ken useful?: It allows translation of historical European or British surveying measurements into Japanese architectural units, aiding restoration, research, and integration of cross-cultural data.

Key Terminology

Long reed: A traditional and obsolete unit of length historically used in land measurement, with its length varying by locality and period.
Ken: A traditional Japanese unit of length equal to six shaku, approximately 1.818 meters, used mainly in architecture for modular measurements.
Conversion rate: The numerical factor used to convert a value from one unit to another; here, 1 Long reed equals 1.5107913669 Ken.

Quick Knowledge Check

What is the approximate standardized length of a ken?

About 0.303 meters

About 1.818 meters

About 3.0 meters

Why can the conversion from long reed to ken vary in accuracy?

Because the ken has no fixed length

Because the length of the long reed differed historically by region

Because the tool lacks conversion formulas

In what fields is converting long reed to ken especially useful?

Historical land surveying and architectural restoration

Modern engineering calculations

Digital map rendering only

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