ONCE by NIGHTWISH has sold 561,810 copies in 8 countries. The album sold best in Germany (300,000 copies), Finland (107,288 copies) and United Kingdom (60,000 copies).
ONCE certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Austria |
15,000 | 1x Gold | 13 October, 2004 |
Austria Sales: 15,000
Certification / note: 1x Gold
Certification Date / sales as of: 13 October, 2004
|
 Finland |
107,288 | IFPI Finland |
Finland Sales: 107,288
Certification / note: IFPI Finland
Certification Date / sales as of:
|
|
 Germany |
300,000 | 3x Gold | 2012 |
Germany Sales: 300,000
Certification / note: 3x Gold
Certification Date / sales as of: 2012
|
 Japan |
9,522 | Oricon charts |
Japan Sales: 9,522
Certification / note: Oricon charts
Certification Date / sales as of:
|
|
 Norway |
20,000 | 1x Gold | 2004 |
Norway Sales: 20,000
Certification / note: 1x Gold
Certification Date / sales as of: 2004
|
 Sweden |
30,000 | 1x Gold | 9 December, 2004 |
Sweden Sales: 30,000
Certification / note: 1x Gold
Certification Date / sales as of: 9 December, 2004
|
 Switzerland |
20,000 | 1x Gold | 2004 |
Switzerland Sales: 20,000
Certification / note: 1x Gold
Certification Date / sales as of: 2004
|
 United Kingdom |
60,000 | 1x Silver | 26 July, 2019 |
United Kingdom Sales: 60,000
Certification / note: 1x Silver
Certification Date / sales as of: 26 July, 2019
|
| Total sales | 561,810 | (in 8 countries) |
Total
Sales: 561,810
(in 8 countries)
|
Year-end chart performance for ONCE
| Chart 2004 | Rank | Sales |
| Austrian Albums (Ö3 Austria) |
72 | |
| Finnish Albums (Suomen Virallinen Lista) |
1 | 86,718 |
| German Albums (Offizielle Top 100) |
20 | |
| Swedish Albums (Sverigetopplistan) |
47 | >30,000 |
| Swiss Albums (Schweizer Hitparade) |
34 |