What is 640x480?
640x480 is a frame containing 640 horizontal pixels and 480 vertical pixels, producing a 4:3 aspect ratio. It is historically associated with VGA displays and video.
How 640x480 works
The 640×480 raster is a specific sample grid whose square-pixel presentation forms a 4:3 picture. Its association with VGA is historical, but dimensions alone do not define a display timing, refresh rate, color depth, codec, or transport. In contemporary media systems it usually appears during legacy ingest, low-resolution capture, compatibility testing, or delivery to equipment with fixed raster requirements.
Key facts
- 1With square pixels, 640 divided by 480 reduces exactly to 4:3; non-square pixel metadata could still instruct a player to display the stored raster differently.
- 2“VGA” describes more than dimensions in its original display context, so a 640×480 video file is not automatically an encoded VGA signal or VGA-compatible transport.
- 3Stretching this raster directly to a 16:9 canvas changes horizontal proportions; preserving geometry requires side padding or cropping from the top and bottom.
When 640x480 matters
Preserve 640x480 when a legacy camera, archive, or conferencing system requires the native frame. Scaling it to widescreen without cropping or padding will stretch the image.