Why this tool is useful
Use this converter when a precision length value is supplied in survey chains, while a specification, worksheet or report requires decameters.
Unit Converters · runs locally
Survey Chains to Decameters Converter
Convert survey chains (ch) to decameters (dam) with a transparent precision length base-unit calculation.
Ready. Your working data stays in this browser.
How it works
The browser multiplies ch by 20.1168 to reach the shared SI reference, then divides by 10 to return dam. No value leaves the page.
Practical example
Entering 1 ch returns 2.01168 dam; the page also shows the exact factors used for an independent check.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.