Steve Zaloga's new book^{1} suggests the T72B MBT has BDDtype armor in the turret along the lines of T55M and T62M MBTs. T72B(M) and T90 turret reportedly have BDD type armor as well. The array has 380mm cast steel and 435mm insert, but the composition is probably improved. The probable upgrade path is the replacing of Aluminum bulging plates with Titanium. Building on the figures for previous BDD equipped tanks we get
TE vs KE  TE vs HEAT  
T72B  Aluminum/rubber sandwhiched between cast steel  0.41  0.34 
T72B(M)/T90  Titanium/rubber sandwhiched between cast steel + air gap  0.56  0.79 
T90 turret projection without Kontakt5 could thus be 38cm x 0.9_{2} + 43.5cm x 0.56 = 59cm KE (the free edge effect will reduce this further to 0.95 x 59cm or 56cm KE) and 38cm + 43.5cm x 0.79 = 72cm HEAT.
Kontakt5 coverage seems to be about 50%.
Upper front turret is 5cm cast plus 5cm STEF at ~7778°.
Glacis is 235mm thick with probably 105mm STEF and 30mm hard steel. The TE of STEF is 0.41 KE and 0.55 HEAT and the TE of hard steel is 1.34 vs KE & 1.3 vs HEAT. Thus the glacis should offer [3 x 1.34 + 10.5 x 0.41 + 11] / 0.38 =~51cm KE and [3 x 1.3 + 10.5 x 0.55 + 11] / 0.38= ~ 54cm HEAT armor. With Kontakt5 the KE value is up 1520cm KE and 4050cm HEAT thus about 69±2cm KE and ~99±4cm HEAT.
Lower hull is 810cm at 64° = LOS thickness of 0.438 or 1723cm KE and HEAT armor.
~8090cm LOS cast mantle x 0.60.7^{1} = 5456cm KE & 8090cm HEAT  
81.5cm LOS x 0.72 [Cast/TiBDD] = 59cm x ~0.95_{3} = 56cm plus K5 = 74±2cm KE
81.5cm LOS x 0.88 [Cast/TiBDD] = 72cm plus K5 = 118±4cm HEAT 

7072cm LOS x 0.72 [Cast/TiBDD] = 5052cm x 0.99_{3} = 4951cm plus K5 = ~6769±2cm KE^{4}
7072cm LOS x 0.88 [Cast/TiBDD] = 6163cm plus K5 = 104±5cm HEAT^{4} 

4448cm LOS x 0.66 [Steel/STB] = 2932cm KE plus K5 where present = 48±6cm KE
4448cm LOS x 0.77 [Steel/STB] = 3437cm HEAT plus K5 where present = 70±16cm HEAT 

[3 x 1.34 + 10.5 x 0.41 + 11] / 0.38_{5} = ~51cm KE plus K5 = 69±2cm KE
[3 x 1.3 + 10.5 x 0.55 + 11] / 0.38_{5} = ~54cm HEAT plus K5 = 94±4cm HEAT 

1723cm KE and 1723cm HEAT  
Side turret ranges from 4060cm thick near front thinning to ~ 1520cm around back. This is probably half and half cast/STEF thus the KE armor is 0.66 while the HEAT armor is 0.77. The effective KE armor ranges from 40cm narrowing quickly to 26cm and 1013cm around back. The HEAT armor ranges from 4631cm near the front down to 1512cm Around back. In the side and rear turret are mounted external storage boxes ~50cm thick that will offer a modicum of spaced armor, this may amount to an additonal ~1315cm HEAT armor. Additionally K5 is mounted around the front side of the turret.  
The side hull is 6cm thick rolled steel but the lower side hull around the wheels is probably only 2cm thick; side skirts add 25 mm thick reinforced rubber [with steel?] plate plus 60cm airgap increasing the HEAT armor by about 1517cm against 2nd gen and 2628cm against 1st gen warheads. This rubber skirting is unlikely to add more than 1cm to the KE side armor, due to deflection. The fuel tanks along the sponsons should add 65cm x 0.1 KE and 0.3 HEAT or an additional 67cm KE and ~ 20cm HEAT armor. Over the front half of the side hull Kontakt5 is mounted which probably adds ~30cm HEAT and at least 5 cm KE resistance.  
The rear armor is unlikely to be more than 4cm but fuel tanks mounted there could offer 0.1 to 0.15 Te resistance to APFSDS and 0.34 resistance to HEAT. The HEAT armor would range from 34cm to as much as 18cm additional HEAT armor. 
^{1}   "Soviet/Russian Armor and Artillery design practices" 
^{2}   adjustment of cast armor to RHA 
^{3}   adjustment for freeedge effect 
^{4}   a substantial portion of this projection on the right side of T72B(M) is not covered by ERA due to mounting of L4 IR searchlight; an area both on the left and right is not covered on T90 because of Shtora emitters. In these areas, instead of K5 assume additional <1cm KE and ~5cm HEAT protection. 
^{5}   adjustment for LOS due to angle 
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with major contributions by Paul Lakowski.