According to Sony Music Japan, HI INFIDELITY by REO SPEEDWAGON has sold 20,000,000 copies worldwide. The album sold best in United States (10,000,000 copies), Canada (500,000 copies) and United Kingdom (60,000 copies).
HI INFIDELITY certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Canada |
500,000 | 5x Platinum | 1983 |
Canada Sales: 500,000
Certification / note: 5x Platinum
Certification Date / sales as of: 1983
|
 United Kingdom |
60,000 | 1x Silver | 30 June, 1981 |
United Kingdom Sales: 60,000
Certification / note: 1x Silver
Certification Date / sales as of: 30 June, 1981
|
 United States |
10,000,000 | 10x Platinum | 17 August, 2017 |
United States Sales: 10,000,000
Certification / note: 10x Platinum
Certification Date / sales as of: 17 August, 2017
|
| Worldwide sales | 20,000,000 | Sony Music Japan |
Total
Sales: 20,000,000
Source: Sony Music Japan
|