Unit workspace
Convert any supported unit locally; no server processing is involved.
Supports decimals, scientific notation, simple fractions and mixed fractions.
Live all-unit matrix
Edit any row; all other units update immediately.
Enter a value to calculate every unit locally.
Length & Distance Converter features
Convert millimetres, centimetres, metres, kilometres, inches, feet, yards, miles, Taiwanese/customary, nano, micro, light-year and nautical-mile units; every row is editable and copyable.
3-step quick guide
- 1Choose the source unit and enter a decimal, scientific notation or fraction.
- 2Edit any row in the matrix to update every other unit instantly.
- 3Use a row copy button and check the reference-basis hint.
Local privacy statement
Values, the conversion matrix and copied results stay in the browser; there is no upload or remote-storage workflow.
No login, membership or server processing is required.
Frequently asked questions
Do fractions and very small numbers work?
Yes. Enter values such as 1/8, 1 1/2 or 3.2e-7; results use high-precision integer-rational arithmetic before formatting.
How are Taiwanese and customary references handled?
Each Taiwanese/customary row includes a reference hint for everyday conversion; use the governing contract standard for certified engineering work.
Are values uploaded?
No. Values and results are calculated only in the current browser tab.