Length Conversion
Convert units of length and distance
Features
Convert between metric and imperial units
Convert 12 units at once, including meters, miles, and feet
Supports shaku, ken, and ri
Convert traditional Japanese shakkanho lengths to modern units too
From light-years to tiny units
Covers extreme scales such as light-years and nanometers
Instant list display as you type
Update results for all units in real time as you enter a number
How to Use
Enter the number to convert
Enter the number you want to convert in the value field
Select the base unit
Select the unit of the entered number from the base unit list
Check the list of converted results
The values converted to all other units are instantly shown in a list
Copy the converted value
Get the value for the unit you need with the copy button on the right of each row
Use Cases
Grasp dimensions of overseas specs
Understand product specs in inches or feet using the metric system
Unify units in drawings and designs
Align dimensions that mix millimeters and centimeters into a single unit
Aid math and science learning
Use it to check unit-conversion answers and understand astronomical scales
Research property dimensions
Convert shakkanho ken and shaku to meters to grasp the floor plan
Convert running distances
Check distances given in miles or nautical miles in kilometers
Basic Knowledge
What are inches and feet in centimeters?
- Inch：1 inch is internationally defined as 2.54cm and is used in size specifications for televisions, tires, and displays.
- Feet and Yards：1 foot equals 12 inches = 30.48cm, and 1 yard equals 3 feet = 91.44cm. These are used in height measurements and golf distance displays.
- Mile：1 mile equals 1,760 yards ≈ 1,609.3m and is used in road distance and speed displays in the US and UK.
What are Shaku, Ma, and Ri?
Shaku, ma, and ri are units of length in the Japanese shakkoku system. 1 shaku is approximately 30.3cm, 1 ma is 6 shaku ≈ 1.818m, and 1 ri is approximately 3.93km. These units remain in use today in architectural floor plans and historical distance expressions along old Japanese roads.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
unit conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the conversion result and input suggestions are not stored on the server.
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RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
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Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.