Exact no, but you can get pretty close by leaving some amount to convert on or just before 12/31? All my income, interest, dividends etc. fall 10 days or more before 12/31 every year so I know almost exactly how much “room” I have. And I have until mid Jan to do the last estimated taxes too.
This is what my dad does. he will contribute half of what he "guesses" will be his limit at the beginning of the year...then towards November he converts the rest after doing dry runs through TurboTax. He usually waits for a dip but that might not come this year.