| Conversions | Club | VS Club | Date | |
|---|---|---|---|---|
| 14 | Toulouse | Ebbw Vale | 19-09-1998 | Match details |
| 9 | Stade Francais | Pontypridd | 12-12-1998 | Match details |
| 7 | Ulster | Ebbw Vale | 10-10-1998 | Match details |
| 7 | Perpignan | Padova | 27-09-1998 | Match details |
| 5 | Begles-Bordeaux | Scarlets | 18-10-1998 | Match details |
| 5 | Colomiers | Benetton Treviso | 25-10-1998 | Match details |
| 4 | Pontypridd | Glasgow Warriors | 19-09-1998 | Match details |
| 3 | Leinster | Scarlets | 06-11-1998 | Match details |
| 3 | Edinburgh Rugby | Ebbw Vale | 27-09-1998 | Match details |
| 3 | Munster | Perpignan | 10-10-1998 | Match details |
| 3 | Benetton Treviso | Pontypridd | 31-10-1998 | Match details |
| 3 | Glasgow Warriors | Benetton Treviso | 18-10-1998 | Match details |
| 2 | Neath | Perpignan | 07-11-1998 | Match details |
| 2 | Ebbw Vale | Ulster | 10-10-1998 | Match details |
| 2 | Scarlets | Leinster | 06-11-1998 | Match details |
| 1 | Padova | Munster | 19-09-1998 | Match details |
