List of floppy disk formats

This is a list of different floppy disk formats.

IBM 8-inch formats

This is a list of 8-inch floppy diskette formats as introduced by IBM.

DEC 8-inch formats

used the following formats on 8-inch disks:

Other manufacturers

Physical composition

Logical formats

Throughout the 1970s and 1980s, many different logical disk formats were used, depending on the hardware platform.

Platform	Size	Density	Bytes/ sector	Sectors/ track	Tracks/ side	Sides	Capacity	rpm	Encoding	Note
Acorn	5-inch	Single	256	10	40	1	100 KB	300	FM	-
Acorn	5-inch	Single	256	10	80	1	200 KB	300	FM	-
Acorn	5-inch	Double	256	16	40	1	160 KB	300	MFM	-
Acorn	5-inch	Double	256	16	80	1	320 KB	300	MFM	-
Acorn	5-inch	Double	256	16	80	2	640 KB	300	MFM	-
Acorn	3-inch	Double	256	16	80	2	640 KB	300	MFM	-
Acorn	3-inch	Double	1024	5	80	2	800 KB	300	MFM	-
Acorn	3-inch	High	1024	10	80	2	1600 KB	300	MFM	-
Agat	5-inch	Double	256	21	80	2	840 KB	300	MFM
Amstrad CPC/PCW	3-inch	Single	512	9	40	1	180 KB	300	MFM	Single head drive, but double sided floppy discs
Amstrad PCW8512/9512	3-inch	Double	512	9	80	2	720 KB	300	MFM	720 KB mode uses both sides - ensure disc inserted correct way up.
Apple II	5-inch	Double	256	13	35	1	113.75 KB	300	GCR
Apple II	5-inch	Double	256	16	35	1	140 KB	300	GCR
Apple II	3-inch	Double	512	Variable	80	1	400 KB	394 - 590	GCR
Apple II	3-inch	Double	512	Variable	80	2	800 KB	394 - 590	GCR
Apple II	3-inch	High	512	18	80	2	1440 KB	300	MFM
Apple Lisa	5-inch FileWare	Double	512	Variable	46	2	851 KB	218 - 320	GCR	-
Apple Lisa 2/Macintosh XL	3-inch	Double	512	Variable	80	1	400 KB	394 - 590	GCR	-
Apple Macintosh	3-inch	Double	512	Variable	80	2	800 KB	394 - 590	GCR	-
Apple Macintosh	3-inch	High	512	18	80	2	1440 KB	300	MFM	-
Atari 8-bit	5-inch	Single	128	18	40	1	90 KB	288	FM
Atari 8-bit	5-inch	Enhanced	128	26	40	1	130 KB	288	MFM
Atari 8-bit	5-inch	Double	256	18	40	1	180 KB	288	MFM
Atari ST/TT/Falcon	3-inch	Double	512	9	80	1	360 KB	300	MFM	-
Atari ST/TT/Falcon	3-inch	Double	512	9	80	2	720 KB	300	MFM	-
Atari ST/TT/Falcon	3-inch	High	512	18	80	2	1440 KB	300	MFM	-
Coleco ADAM	5-inch	Double	512	8	40	1	160 KB	300	MFM	-
Commodore	5-inch	Double	256	Variable ZCAV	35	1	170 KB	300	GCR
Commodore	5-inch	Double	256	Variable ZCAV	35	2	340 KB	300	GCR
Commodore	5-inch	Quad	256	Variable ZCAV	77	1	521 KB	300	GCR
Commodore	5-inch	Quad	256	Variable ZCAV	77	2	1042 KB	300	GCR
Commodore	3-inch	Double	512	10	80	2	800 KB	300	MFM
Commodore Amiga	5-inch	Double	512	11	40	2	440 KB	300	MFM
Commodore Amiga	5-inch	Quad	512	11	80	2	880 KB	300	MFM
Commodore Amiga	3-inch	Double	512	11	80	2	880 KB	300	MFM
Commodore Amiga	3-inch	High	512	19	80	2	1520 KB	300	GCR
Commodore Amiga	3-inch	High	512	22	80	2	1760 KB	150	MFM
IBM 3740	8-inch	Single	128	26	73	1	237.25 KB	360	FM
DEC RX50	5-inch	Double	512	10	80	1	400 KB	300	MFM	-
IBM PC compatibles	8-inch	Single	128	26	77	1	250.25 KB	360	MFM
IBM PC compatibles	8-inch	Single	128	26	77	2	500.5 KB	360	MFM
IBM PC compatibles	8-inch	Double	1024	8	77	1	616 KB	360	MFM
IBM PC compatibles	8-inch	Double	1024	8	77	2	1232 KB	360	MFM
IBM PC compatibles	5-inch	Double	512	8	40	1	160 KB	300	MFM
IBM PC compatibles	5-inch	Double	512	8	40	2	320 KB	300	MFM
IBM PC compatibles	5-inch	Double	512	9	40	1	180 KB	300	MFM
IBM PC compatibles	5-inch	Double	512	9	40	2	360 KB	300	MFM
IBM PC compatibles	5-inch	Quad	512	8	80	1	320 KB	300	MFM
IBM PC compatibles	5-inch	Quad	512	8	80	2	640 KB	300	MFM
IBM PC compatibles	5-inch	High	512	15	80	2	1200 KB	360	MFM
IBM PC compatibles	3-inch	Double	512	8	80	1	320 KB	300	MFM	-
IBM PC compatibles	3-inch	Double	512	9	80	1	360 KB	300	MFM	-
IBM PC compatibles	3-inch	Double	512	8	80	2	640 KB	300	MFM	-
IBM PC compatibles	3-inch	Double	512	9	80	2	720 KB	300	MFM	-
IBM PC compatibles	3-inch	High	512	18	80	2	1440 KB	300	MFM	-
IBM PC compatibles	3-inch	High	512	21	80	2	1680 KB	300	MFM	DMF
IBM PC compatibles	3-inch	High	512	21	82	2	1720 KB	300	MFM	DMF
IBM PC compatibles	3-inch	Extended	512	36	80	2	2880 KB	300	MFM	-
MGT SAM Coupé	3-inch	Double	512	10	80	2	800 KB	300	MFM
NEC PC98	8-inch	Single	128	26	77	1	250.25 KB	360	FM
NEC PC98	8-inch	Double	1024	8	77	2	1232 KB	360	MFM
NEC PC98	5-inch	Double	512	8	80	2	640 KB	360	MFM	-
NEC PC98	5-inch	Double	512	9	80	2	720 KB	360	MFM	-
NEC PC98	5-inch	High	512	15	80	2	1200 KiB	360	MFM	-
NEC PC98	5-inch	High	1024	8	77	2	1232 KB	360	MFM
NEC PC98	3-inch	Double	512	8	80	2	640 KB	360	MFM	-
NEC PC98	3-inch	Double	512	9	80	2	720 KB	360	MFM	-
NEC PC98	3-inch	High	512	15	80	2	1200 KB	360	MFM	3-mode
NEC PC98	3-inch	High	1024	8	77	2	1232 KB	360	MFM	3-mode
NEC PC98	3-inch	High	512	18	80	2	1440 KB	300	MFM	-
NEC PC98	3-inch	Triple	512	38	240	2	9120 KB	360	MFM	NEC PC-88 VA3 2TD drive only
Osborne 1	5-inch	Single	256	10	40	1	100 KB	300	FM	-
Osborne 1	5-inch	Double	1024	10	40	1	200 KB	300	MFM	-
Sega SF-7000	3-inch	Single	256	16	40	2	160 KiB	?	?	Expansion unit for SC-3000 home computer. Capacity is per side.
SHARP X68000	5-inch	High	1024	8	77	2	1232 KB	360	MFM
SHARP X68000	3-inch	High	1024	8	77	2	1232 KB	360	MFM
SHARP CE-1600F, CE-140F	2-inch	Single	512	8	16	drive: 1, diskette: 2	2× 64 KB	270	GCR	Internally based on FDU-250 Micro Floppy Disk Drive Unit
Thomson	5-inch	Single	128	16	40	1	80 KB	300	FM	Thomson UD90.070
Thomson	5-inch	Double	256	16	40	2	320 KB	300	MFM	Thomson DD90-320
Thomson	3-inch	Double	256	16	80	1	320 KB	300	MFM	Thomson TO9, Thomson DD09-350
Thomson	3-inch	Double	256	16	80	2	640 KB	300	MFM	Thomson TO8D, TO9+, Thomson DD90-352

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