According to Universal Music Japan, ROCKFERRY by DUFFY has sold 6,500,000 copies worldwide. The album sold best in United Kingdom (2,200,000 copies), United States (500,000 copies) and Germany (400,000 copies).
ROCKFERRY certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
140,000 | 2x Platinum | AUGUST 2009 |
Australia Sales: 140,000
Certification / note: 2x Platinum
Certification Date / sales as of: AUGUST 2009
|
 Austria |
20,000 | 1x Platinum | 18 June, 2008 |
Austria Sales: 20,000
Certification / note: 1x Platinum
Certification Date / sales as of: 18 June, 2008
|
 Belgium |
60,000 | 2x Platinum | 2009 |
Belgium Sales: 60,000
Certification / note: 2x Platinum
Certification Date / sales as of: 2009
|
 Canada |
50,000 | 1x Gold | 2008 |
Canada Sales: 50,000
Certification / note: 1x Gold
Certification Date / sales as of: 2008
|
 Denmark |
140,000 | 7x Platinum | 2 May, 2017 |
Denmark Sales: 140,000
Certification / note: 7x Platinum
Certification Date / sales as of: 2 May, 2017
|
 Finland |
40,743 | IFPI Finland |
Finland Sales: 40,743
Certification / note: IFPI Finland
Certification Date / sales as of:
|
|
 Germany |
400,000 | 2x Platinum | 2009 |
Germany Sales: 400,000
Certification / note: 2x Platinum
Certification Date / sales as of: 2009
|
 Grecce |
10,000 | 1x Platinum |
Grecce Sales: 10,000
Certification / note: 1x Platinum
Certification Date / sales as of:
|
|
 Ireland |
45,000 | 3x Platinum | 2008 |
Ireland Sales: 45,000
Certification / note: 3x Platinum
Certification Date / sales as of: 2008
|
 Korea |
1,290 | RIAK / Gaon charts |
Korea Sales: 1,290
Certification / note: RIAK / Gaon charts
Certification Date / sales as of:
|
|
 Netherlands |
60,000 | 1x Platinum | 2008 |
Netherlands Sales: 60,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2008
|
 New Zealand |
45,000 | 3x Platinum |
New Zealand Sales: 45,000
Certification / note: 3x Platinum
Certification Date / sales as of:
|
|
 Poland |
20,000 | 1x Platinum | 2008 |
Poland Sales: 20,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2008
|
 Portugal |
10,000 | 1x Gold |
Portugal Sales: 10,000
Certification / note: 1x Gold
Certification Date / sales as of:
|
|
 Russia |
20,000 | 1x Platinum | 2008 |
Russia Sales: 20,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2008
|
 Spain |
80,000 | 1x Platinum | 2009 |
Spain Sales: 80,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2009
|
 Sweden |
80,000 | 2x Platinum | 13 August, 2008 |
Sweden Sales: 80,000
Certification / note: 2x Platinum
Certification Date / sales as of: 13 August, 2008
|
 Switzerland |
90,000 | 3x Platinum | 2009 |
Switzerland Sales: 90,000
Certification / note: 3x Platinum
Certification Date / sales as of: 2009
|
 United Kingdom |
2,200,000 | 7x Platinum | 22 July, 2013 |
United Kingdom Sales: 2,200,000
Certification / note: 7x Platinum
Certification Date / sales as of: 22 July, 2013
|
 United States |
500,000 | 1x Gold | 26 June, 2008 |
United States Sales: 500,000
Certification / note: 1x Gold
Certification Date / sales as of: 26 June, 2008
|
 Gulf States |
3,000 | 1x Gold | 2010 |
Gulf States Sales: 3,000
Certification / note: 1x Gold
Certification Date / sales as of: 2010
|
 Europe (IFPI) |
4,000,000 | 4x Platinum | 2009 |
Europe (IFPI) Sales: 4,000,000
Certification / note: 4x Platinum
Certification Date / sales as of: 2009
|
| Worldwide sales | 6,500,000 | Universal Music Japan |
Total
Sales: 6,500,000
Source: Universal Music Japan
|
Decade-end chart performance for ROCKFERRY
| Chart 2000's | Rank |
| Dutch Albums (Album Top 100) |
55 |
| UK Albums (Music Week) |
21 |