Fifty Is Not the Hard Part: Who Actually Converts in Test Cricket

Getting in is one skill. Staying in once you are set is a different one, and the gap between the two is where Test careers are made.

The measure

Take every score past fifty a batter has made and ask what share of them became hundreds. A player with 20 hundreds and 20 fifties converted half. A player with 10 hundreds and 40 fifties converted a fifth, and has probably been described as someone who gets starts.

Among batters in our Test records with at least 15 hundreds and 40 innings, the leaders are:

| Batter | Hundreds | Fifties | Conversion | |---|---|---|---| | Younis Khan | 24 | 21 | 53.3% | | MJ Clarke | 26 | 25 | 51.0% | | JH Kallis | 25 | 24 | 51.0% | | V Kohli | 30 | 31 | 49.2% | | KC Sangakkara | 29 | 33 | 46.8% | | KS Williamson | 33 | 38 | 46.5% | | SPD Smith | 37 | 44 | 45.7% | | DPMD Jayawardene | 20 | 24 | 45.5% |

What a good rate looks like

Younis Khan converting more than half of his fifty-plus scores is remarkable, and the fact that only three men on this list clear 50 per cent tells you how hard it is. These are among the best batters of their era and most of them turn roughly two of every five starts into a hundred.

The names are also a useful corrective to the idea that conversion is about temperament alone. Clarke and Kohli were aggressive players; Kallis and Younis were accumulators. Both approaches appear near the top, which suggests conversion is less about how you score and more about whether you keep making decisions once the hard work is done.

The caveat that matters

Our Test records begin in 2005. Anyone whose career started before then is cut off at that date, so Kallis and Jayawardene appear here with a portion of their careers rather than all of it. These are totals in our data, not full career records. Afghanistan men's matches are absent from the public archive these records are built on.