According to Whitney Houston official site, I'M YOUR BABY TONIGHT by WHITNEY HOUSTON has sold 10,000,000 copies worldwide. The album sold best in United States (4,000,000 copies), Germany (500,000 copies) and Japan (400,000 copies).
I'M YOUR BABY TONIGHT certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
70,000 | 1x Platinum | DECEMBER 1990 |
Australia Sales: 70,000
Certification / note: 1x Platinum
Certification Date / sales as of: DECEMBER 1990
|
 Austria |
50,000 | 1x Platinum | 17 January, 1991 |
Austria Sales: 50,000
Certification / note: 1x Platinum
Certification Date / sales as of: 17 January, 1991
|
 Canada |
100,000 | 1x Platinum | 1991 |
Canada Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1991
|
 Finland |
35,702 | IFPI Finland |
Finland Sales: 35,702
Certification / note: IFPI Finland
Certification Date / sales as of:
|
|
 France |
300,000 | 1x Platinum | 1991 |
France Sales: 300,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1991
|
 Germany |
500,000 | 1x Platinum | 1991 |
Germany Sales: 500,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1991
|
 Japan |
400,000 | 2x Platinum | February 1997 |
Japan Sales: 400,000
Certification / note: 2x Platinum
Certification Date / sales as of: February 1997
|
 Latvia |
4,000 | 1x Gold | 2001 |
Latvia Sales: 4,000
Certification / note: 1x Gold
Certification Date / sales as of: 2001
|
 Netherlands |
100,000 | 1x Platinum | 1991 |
Netherlands Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1991
|
 New Zealand |
15,000 | 1x Platinum |
New Zealand Sales: 15,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
 Norway |
45,171 | Year-end list | 1990 |
Norway Sales: 45,171
Certification / note: Year-end list
Certification Date / sales as of: 1990
|
 Spain |
200,000 | 2x Platinum | 1991 |
Spain Sales: 200,000
Certification / note: 2x Platinum
Certification Date / sales as of: 1991
|
 Sweden |
100,000 | 1x Platinum | 4 December, 1990 |
Sweden Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 4 December, 1990
|
 Switzerland |
100,000 | 2x Platinum | 1994 |
Switzerland Sales: 100,000
Certification / note: 2x Platinum
Certification Date / sales as of: 1994
|
 United Kingdom |
300,000 | 1x Platinum | 1 November, 1990 |
United Kingdom Sales: 300,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1 November, 1990
|
 United States |
4,000,000 | 4x Platinum | 5 April, 1995 |
United States Sales: 4,000,000
Certification / note: 4x Platinum
Certification Date / sales as of: 5 April, 1995
|
| Worldwide sales | 10,000,000 | Whitney Houston official site |
Total
Sales: 10,000,000
Source: Whitney Houston official site
|
Year-end chart performance for I'M YOUR BABY TONIGHT
| Chart 1990 | Rank | Sales |
| Australian Albums (ARIA) |
41 | >70,000 |
| Canadian Albums (RPM) |
67 | |
| Dutch Albums (Album Top 100) |
23 | |
| Norwegian Albums (Dagbladet) |
15 | 45,171 |
| UK Albums |
28 | |
| UK Artist Albums |
25 | |
| Chart 1991 | Rank | Sales |
| Austrian Albums (Ö3 Austria) |
17 | |
| Canadian Albums (RPM) |
61 | |
| Dutch Albums (Album Top 100) |
35 | |
 European Albums (Music & Media) |
13 | |
| German Albums (Offizielle Top 100) |
42 | |
| Japanese Albums (Oricon) |
78 | 216,910 |
| Swiss Albums (Schweizer Hitparade) |
22 | |
| UK Albums |
56 | |
| US Albums (Billboard 200) |
10 |