WARNING by GREEN DAY has sold 1,202,920 copies in Australia, Canada, Japan, United Kingdom and United States.
WARNING certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Australia |
70,000 | 1x Platinum | OCTOBER 2000 |
Australia Sales: 70,000
Certification / note: 1x Platinum
Certification Date / sales as of: OCTOBER 2000
|
 Canada |
100,000 | 1x Platinum | 2001 |
Canada Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 2001
|
 Japan |
232,920 | 1x Platinum | September 2000 |
Japan Sales: 232,920
Certification / note: 1x Platinum
Certification Date / sales as of: September 2000
|
 United Kingdom |
300,000 | 1x Platinum | 3 September, 2021 |
United Kingdom Sales: 300,000
Certification / note: 1x Platinum
Certification Date / sales as of: 3 September, 2021
|
 United States |
500,000 | 1x Gold | 1 December, 2000 |
United States Sales: 500,000
Certification / note: 1x Gold
Certification Date / sales as of: 1 December, 2000
|
| Total sales | 1,202,920 | (in 5 countries) |
Total
Sales: 1,202,920
(in 5 countries)
|
Year-end chart performance for WARNING
| Chart 2000 | Rank | Sales |
| Australian Albums (ARIA) |
80 | >70,000 |
| Canadian Albums (SoundScan) |
78 | |
| Japanese Albums (Oricon) |
98 | 203,470 |
| UK Albums |
174 | 110,000 |
| Chart 2001 | Rank | Sales |
| US Albums (Billboard 200) |
197 |