BIG GENERATOR by YES has sold 1,022,910 copies in Japan and United States.
BIG GENERATOR certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Japan |
22,910 | Oricon charts |
Japan Sales: 22,910
Certification / note: Oricon charts
Certification Date / sales as of:
|
|
 United States |
1,000,000 | 1x Platinum | 29 April, 1988 |
United States Sales: 1,000,000
Certification / note: 1x Platinum
Certification Date / sales as of: 29 April, 1988
|
| Total sales | 1,022,910 | (in 2 countries) |
Total
Sales: 1,022,910
(in 2 countries)
|
Year-end chart performance for BIG GENERATOR
| Chart 1987 | Rank |
 Canadian Albums (RPM) |
72 |
| Chart 1988 | Rank |
| US Albums (Billboard 200) |
72 |