INSIDE IN / INSIDE OUT by THE KOOKS has sold 1,732,500 copies in 6 countries. The album sold best in United Kingdom (1,500,000 copies), Germany (100,000 copies) and Australia (70,000 copies).
INSIDE IN / INSIDE OUT certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
70,000 | 1x Platinum |
Australia Sales: 70,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
 Belgium |
25,000 | 1x Gold | 2007 |
Belgium Sales: 25,000
Certification / note: 1x Gold
Certification Date / sales as of: 2007
|
 Germany |
100,000 | 1x Gold | March 2023 |
Germany Sales: 100,000
Certification / note: 1x Gold
Certification Date / sales as of: March 2023
|
 Ireland |
30,000 | 2x Platinum | 2006 |
Ireland Sales: 30,000
Certification / note: 2x Platinum
Certification Date / sales as of: 2006
|
 New Zealand |
7,500 | 1x Gold |
New Zealand Sales: 7,500
Certification / note: 1x Gold
Certification Date / sales as of:
|
|
 United Kingdom |
1,500,000 | 5x Platinum | 7 October, 2016 |
United Kingdom Sales: 1,500,000
Certification / note: 5x Platinum
Certification Date / sales as of: 7 October, 2016
|
 Europe (IFPI) |
1,000,000 | 1x Platinum | 2006 |
Europe (IFPI) Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2006
|
| Total sales | 1,732,500 | (in 6 countries) |
Total
Sales: 1,732,500
(in 6 countries)
|
Year-end chart performance for INSIDE IN / INSIDE OUT
| Chart 2006 | Rank |
| Belgian Albums (Ultratop Flanders) |
12 |
| UK Albums (Charts Plus) |
5 |
| Chart 2007 | Rank |
| Belgian Albums (Ultratop Flanders) |
75 |
| UK Albums (Charts Plus) |
97 |
| Chart 2008 | Rank |
| UK Albums (Charts Plus) |
192 |
Decade-end chart performance for INSIDE IN / INSIDE OUT
| Chart 2000's | Rank |
| UK Albums (Music Week) |
74 |