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 August 31, 1999 to August 29, 2000, 1 point equals 1,008,000 households, so a rating of 3.2 equals 3.2 x 1,008,000 or 3,225,600 viewers.
Highest Rated Buffy Episode This Season: The September 29th, 1998 Season Premire of "Anne" with a 4.7 rating (4,671,800 viewers)
Lowest Rated Buffy Episode This Season: The March 20th, 2000 Second Repeat of "The Prom" with a 1.8 rating (1,814,400 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.])
March 20, 2000 - The Prom (2nd repeat) - 1.8 - 108/117
February 23, 2000 - Earshot (repeat) - 2.1 - 100/132
September 28, 1999 - Graduation Day (Parts 1 and 2) (repeat) - 2.8 - 107/145
September 21, 1999 - Earshot - 3.6 - 93/139
September 14, 1999 - Enemies (2nd repeat) - 2.1 - 104/135
September 7, 1999 - Consequences (2nd repeat) - 2.0 - 105/136
August 31, 1999 - Bad Girls (2nd repeat) - 2.0 - 103/138
August 24, 1999 - Helpless (2nd repeat) - 2.1 - 101/136
August 17, 1999 - Gingerbread (2nd repeat) - 2.0 - 105/134
August 10, 1999 - The Prom (repeat) - 2.1 - 101/126
August 3, 1999 - Choices (repeat) - 1.9 - 104/117
July 27, 1999 - The Zeppo (2nd repeat) - 1.9 - 103/132
July 20, 1999 - Revelations (2nd repeat) - 2.0 - 102/128
July 13, 1999 - Graduation Day (Part 2 of 2) (Season Finale) - 4.4 - 73/126
July 6, 1999 - Beauty and the Beasts (2nd repeat) - 2.3 - 99/129
June 22, 1999 - Faith, Hope & Trick (2nd repeat) - 2.2 - 100/130
June 15, 1999 - Anne (2nd repeat) - 2.2 - 98/130
June 8, 1999 - Enemies (repeat) - 2.3 - 96/125
June 7, 1999 - Lovers Walk (2nd repeat) - 2.2 - 98/125
June 1, 1999 - Consequences (repeat) - 2.3 - 99/131
May 31, 1999 - Homecoming (2nd repeat) - 2.1 - 102/131
May 25, 1999 - Band Candy (2nd repeat) - 3.0 - 81/114
May 24, 1999 - Doppelgangland (repeat) - 2.7 - 84/114
May 18, 1999 - Graduation Day (Part 1 of 2) - 3.6 - 82/114
May 17, 1999 - The Wish (repeat) - 2.8 - 88/114
May 11, 1999 - The Prom - 3.8 - 87/122
May 4, 1999 - Choices - 3.6 - 90/124
April 27, 1999 - Bad Girls (repeat) - 2.8 - 98/125
April 20, 1999 - The Zeppo (repeat) - 2.4 - 104/129
April 13, 1999 - Helpless (repeat) - 2.4 - 106/129
April 6, 1999 - Phases (2nd repeat) - 2.5 - 102/133
March 30, 1999 - Gingerbread (repeat) - 2.7 - 95/126
March 23, 1999 - Lovers Walk (repeat) - 2.7 - 101/128
March 16, 1999 - Enemies - 4.1 - 93/130
March 9, 1999 - Beauty and the Beasts (repeat) - 3.3 - 95/130
March 2, 1999 - Revelations (repeat) - 2.5 - 101/122
February 23, 1999 - Doppelgangland - 4.4 - 84/121
February 16, 1999 - Consequences - 4.1 - 88/122
February 9, 1999 - Bad Girls - 4.2 - 88/125
February 2, 1999 - Homecoming (repeat) - 3.3 - 93/123
January 26, 1999 - The Zeppo - 4.1 - 94/133
January 19, 1999 - Helpless - 4.6 - 85/125
January 18, 1999 - Band Candy (repeat) - 2.4 - 106/125
January 12, 1999 - Gingerbread - 4.2 - 91/129
January 5, 1999 - Faith, Hope & Trick (repeat) - 3.0 - 93/126
December 22, 1998 - Dead Man's Party (repeat) - 2.9 - 89/127
December 21, 1998 - Amends (repeat) - 2.2 - 98/127
December 15, 1998 - Amends - 4.3 - 88/133
December 8, 1998 - The Wish - 4.2 - 88/128
December 1, 1998 - Anne (repeat) - 3.7 - 90/126
November 24, 1998 - Lovers Walk - 3.7 - 76/110
November 17, 1998 - Revelations - 4.4 - 92/130
November 10, 1998 - Band Candy - 4.1 - 96/131
November 3, 1998 - Homecoming - 4.3 - 95/134
October 20, 1998 - Beauty and the Beasts - 4.3 - 94/131
October 13, 1998 - Faith, Hope & Trick - 3.9 - 88/125
October 6, 1998 - Dead Man's Party - 4.3 - 85/126
September 29, 1998 - Anne (Season Premiere) - 4.7 - 80/119