DXF Unit Converter
Convert DXF units between mm, cm, m, inch and foot — geometry is rescaled and the $INSUNITS header rewritten, so real-world dimensions stay identical. Free, no upload, runs in your browser.
Processing and data safety
Section titled “Processing and data safety”This tool runs entirely in your browser — your files are never uploaded to a server.
Input and output
Section titled “Input and output”- Formats: DXF
- Flow: DXF → rescaled DXF with a rewritten $INSUNITS header
How to use
Section titled “How to use”- Drop a .dxf file into the area — when the header declares $INSUNITS, the source unit is pre-filled from it (adjust if the drawing uses different units).
- Pick the source and target units.
- Click “Convert & download” — the rescaled DXF downloads (the filename carries the target unit).
Key details and limits
Section titled “Key details and limits”- Assumes the source drawing already uses the units you select.
- ASCII DXF only.
- Bulge arc segments in polylines (group code 42) are flattened to straight segments when the DXF is rewritten.
Common use cases
Section titled “Common use cases”- mm → inch: the whole drawing is rescaled by 1/25.4 and rewritten