For the episodes airing between and including September 15, 1997 and August 25, 1998, 1 point equals 980,000 housholds, so a rating of 3.2 equals 3.2 x 980,000 or 3,136,000 viewers.
For the episodes airing between and including August 31, 1998 and August 24, 1999, 1 point equals 994,000 households, so a rating of 3.2 equals 3.2 x 994,000 or 3,180,800 viewers.
For episodes airing from and including September 5, 2000 to the present, 1 point equals 1,022,000 housholds, so a rating of 3.2 equals 3.2 x 1,022,000, or 3,270,400 viewers.
Highest Rated Buffy Episode This Season: The January 20th, 1998 Premire of "Innocence" with a 5.2 rating (5,096,000 viewers)
Lowest Rated Buffy Episode This Season: The August 25th, 1998 Second Repeat of "Passion" with a 1.9 rating (1,888,600 viewers)
(Air Date - Episode Title - Nielsen rating - national ranking for primetime [91/112 - 91st best rating out of 112 shows on primetime in a given week.])
October 31, 2000 - Halloween (3rd repeat) - 1.9 - 113/138
Dec 29, 1998, 9:00-10:00 - Becoming (Part 2 of 2) (2nd repeat) - 3.1 - 91/125
Dec 22, 1998, 8:00-9:00 - Becoming (Part 1 of 2) (2nd repeat) - 2.9 - 93/125
Oct 27, 1998 - Halloween (2nd repeat) - 3.4 - 100/129
September 22, 1998 - Becoming (Part 2 of 2) (repeat) - 2.7 - 91/122
September 15, 1998 - Becoming (Part 1 of 2) (repeat) - 2.6 - 93/122
September 14, 1998 - Killed By Death (2nd repeat) - 2.1 103/122
September 7, 1998 - Ted (2nd repeat) - 2.2 - 88/103
September 1, 1998 - Go Fish (repeat) - 2.1 - 96/112
August 31, 1998 - Reptile Boy (2nd repeat) - 2.2 - 93/112
August 25, 1998 - Passion (2nd repeat) - 1.9 - 105/114
August 24, 1998 - Bad Eggs (2nd repeat) - 2.4 - 91/114
August 18, 1998 - Innocence (Part 2 of 2) (2nd repeat) - 2.1 - 105/117
August 17, 1998 - Surprise (Part 1 of 2) (2nd repeat) - 2.3 - 101/117
August 11, 1998 - What's My Line (Part 2 of 2) (2nd repeat) - 2.5 - 95/114
August 10, 1998 - What's My Line (Part 1 of 2) (2nd repeat) - 2.1 - 102/114
August 4, 1998 - When She Was Bad (2nd repeat) - 2.4 - 93/112
July 28, 1998 - School Hard (2nd repeat) - 2.2 - 98/112
July 21, 1998 - The Dark Age (2nd repeat) - 2.3 - 96/110
July 20, 1998 - Nightmares (2nd repeat) - 2.3 - 96/110
July 14, 1998 - I Only Have Eyes For You (repeat) - 2.4 - 96/110
June 30, 1998 - Inca Mummy Girl (2nd repeat) - 2.2 - 96/114
June 23, 1998 - Some Assembly Required (2nd repeat) - 2.2 - 102/117
June 16, 1998 - Bewitched, Bothered, and Bewildered (repeat) - 2.4 97/114
June 9, 1998 - Killed By Death (repeat) - 2.5 - 99/115
May 26, 1998, 9:00-10:00 - Passion (repeat) 2.7 - 98/114
May 26, 1998, 8:00-9:00 - Phases (repeat) 2.7 - 98/114
May 19, 1998 - Becoming, Part 2 (Season Finale) - 4.2 - 74/102
May 12, 1998 - Becoming, Part 1 - 3.8 - 84/101
May 5, 1998 - Go Fish - 3.6 - 92/111
April 28, 1998 - I Only Have Eyes For You - 3.6 - 95/112
April 21, 1998 - Innocence (repeat) - 2.9 - 94/108
April 14, 1998 - Surprise (repeat) - 2.4 - 106/114
April 7, 1998 - Bad Eggs (repeat) - 2.8 - 100/113
March 31, 1998 - What's My Line (Part 2 of 2) (repeat) - 2.9 - 99/114
March 24, 1998 - What's My Line (Part 1 of 2) (repeat) - 2.9 - 96/114
March 17, 1998 - Ted (repeat) - 3.4 - 101/117
March 10, 1998 - Lie To Me (repeat) - 3.4 - 97/112
March 3, 1998 - Killed By Death - 4.1 - 92/111
February 24, 1998 - Passion - 4.3 - 82/105
February 17, 1998 - The Dark Age (repeat) - 3.5 66/86
February 10, 1998 - Bewitched, Bothered and Bewildered - 4.5 68/93
February 3, 1998 - Halloween (repeat) - 4.0 86/106
January 27, 1998 - Phases 4.9 - 85/109
January 20, 1998 - Innocence (Part 2 of 2) - 5.2 85/118
January 19, 1998 - Surprise (Part 1 of 2) - 4.4 - 94/118
January 12, 1998 - Bad Eggs - 4.1 - 94/118
January 5, 1998 - Inca Mummy Girl (repeat) - 3.1 - 99/115
December 29, 1997 - Reptile Boy (repeat) - 3.3 - 85/108
December 22, 1997 School Hard (repeat) - 3.0 - 85/107
December 15, 1997 - Some Assembly Required (repeat) - 2.6 - 100/113
December 8, 1997 - Ted - 3.9 - 93/118
December 1, 1997 - When She Was Bad (repeat) - 3.1 - 105/115
November 24, 1997 - What's My Line (Part 2 of 2) - 3.5 - 84/104
November 17, 1997 - What's My Line (Part 1 of 2) - 3.5 - 99/112
November 10, 1997 - The Dark Age - 3.7 - 101/119
November 3, 1997 - Lie To Me - 3.4 - 98/113
October 27, 1997 - Halloween - 3.7 - 99/118
October 13, 1997 - Reptile Boy - 3.5 - 100/118
October 6, 1997 - Inca Mummy Girl - 3.2 - 92/105
September 29, 1997 - School Hard - 3.4 - 93/109
September 22, 1997 - Some Assembly Required - 3.2 - 100/109
September 15, 1997 - When She Was Bad (Season Premiere) - 2.9 - 97/109
