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To convert Phosphate % to bpl, use the formula to convert P2O5% to bpl

% of P2O5 * 310 (I.e.molecular wt of TCP) / 142 (I.e.Moleculat wt of P2O5)

Conversion from P2O5 to BPL
P2O5 BPL
20 43.704
20.5 44.7966
21 45.8892
21.5 46.9818
22 48.0744
22.5 49.167
23 50.2596
23.5 51.3522
24 52.4448
24.5 53.5374
25 54.63
25.5 55.7226
26 56.8152
26.5 57.9078
27 59.0004
27.5 60.093
28 61.1856
28.5 62.2782
29 63.3708
29.5 64.4634
30 65.556
P2O5 BPL
30.5 66.6486
31 67.7412
31.5 68.8338
32 69.9264
32.5 71.019
33 72.1116
33.5 73.2042
34 74.2968
34.5 75.3894
35 76.482
BPL= 2.1852 P2O5
P2O5= 0.4576 BPL

The grade of phosphate rock is expressed as its percentage of phosphorus pentoxide (P2O5) content, or expressed in terms of tricalcium phosphate, Ca3(PO4)2, known in the trade as “Bone Phosphate of Lime or BPL”.

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