If you know the number of innings you've played at any level and the number of scores above 50 you can calculate your Innings Per Fifty Batting Index.
Don Bradman played 338 test and first class innings and scored 117 centuries and 69 half centuries. 186 scores above above 50. 338 innings divided by 186 scores above 50 gives Bradman a IPF Batting Index of 1.82
Former South African Test batter Barry Richards played 576 test and first class innings and scored 80 centuries and 152 half centuries so his IFP Batting Index is 2.48.
Examples of other batters IPF in first class cricket
Sachin Tendulkar - 2.48
Ricky Ponting - 2.63
Jacques Kallis - 2.65
Graeme Pollock - 2.68. 437 test and first class innings
Steve Smith 2.70 currently
Mark Waugh - 2.76. 622 test and first class innings
Chris Rogers - 2.80
Kane Williamson - 2.81
Kumar Sangakkara - 2.87
Viv Richards 2.88 - played 796 test and first class innings
Matthew Hayden - 2.88
Brian Lara - 2.88
Damien Martyn - 2.93
Greg Chappell - 2.93. 542 test and first class innings
Allan Border - 2.95
Mike Hussey - 2.96
Joe Root - 2.97
Babar Azam - 2.98
Steve Waugh - 3.13
David Warner - 3.23
Virat Kohli - 3.23
Examples of existing first class players around Australia
Ollie Davies - 2.67. Has only played 16 first class innings
Marnuis Labuschagne - 3.14
Usman Khawaja - 3.22
Travis Head - 3.49
Peter Handscomb - 3.56
Daniel Hughes - 3.89
Nic Maddinson - 3.96
Cameron Green - 4.00
Marcus Harris - 4.01
Kurtis Patterson - 4.05
Nathan McSweeney - 4.21
Tim Ward - 4.31
Cameron Bancroft - 4.44
Matt Renshaw - 4.83
