List of floppy disk formats Known disk logical formats Common floppy disk formats, logical characteristics by platform

| Platform | Size_ | Density | Bytes_sector | Sectors_track | Tracks_side | Sides | Capacity | Encoding_ |
|---|---|---|---|---|---|---|---|---|
| Apple Macintosh | 3½ in (90mm) | double | 512 | Variable (8-12) | 80 | 2 | 800 KB | GCR |
| Apple Macintosh | 3½ in (90mm) | high | 512 | 18 | 80 | 2 | 1440 KB | MFM |
| Atari 8-bit | 5¼in | single | 128 | 18 | 40 | 1 | 90KB | FM |
| Atari 8-bit | 5¼in | enhanced | 128 | 26 | 40 | 1 | 127KB | MFM |
| Atari 8-bit | 5¼in | double | 256 | 18 | 40 | 1 | 180KB | MFM |
| Commodore (8-bit) | 5¼in | double | 256 | Variable (17-21) ZCAV | 35 | 1 | 170KB | GCR |
| Commodore (8-bit) | 5¼in | double | 256 | Variable (17-21) ZCAV | 35 | 2 | 340KB | GCR |
| Commodore (8-bit) | 5¼in | quad | 256 | Variable (23-29) ZCAV | 77 | 1 | 521KB | GCR |
| Commodore (8-bit) | 5¼in | quad | 256 | Variable (23-29) ZCAV | 77 | 2 | 1042KB | GCR |