A rough comparison divides standard displacement by half the product of length and beam. Using the figures in the discussion gives the Queen Elizabeth class about 0.9489, Tiger 0.8947, Renown 0.7405, and Hood about 0.9190. Tiger's 28,500-ton standard displacement puts her much closer on this measure to ships already carrying 15-inch guns than to Renown. The figures are a quick comparison of how heavily the ships were built, with substantial reconstruction still required. They support an initial case for carrying the larger armament.
Notable Point · 1:32-4:41
A rough hull comparison puts Tiger near existing 15-inch ships
Displacement divided by approximate hull area supplies a rough comparison for judging whether Tiger could support heavier guns.