Requested by User:KLOL506 here
The tank appears to be a Pandur II, which is 22 Tonnes, or 22,000 Kilograms.
Steel has a density of 8,050 kg/m3, so, applying in reverse means that the volume is 2.73291925466 Cubic Meters, or, 2732919.25466 Cubic Centimeters.
J/CC of Violent Frag is 568.5, so....
1553664596.27 Joules, 0.37133475054 Tons of TNT, Building level