Would it carry?
The broadcast says “that went 78 metres.” Was that six everywhere, or only there? Type the distance, pick where it went, and see which of the 121 grounds it clears.
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How the sums work. Broadcast distances are quoted from the striker's end; the site's figures are radii from the pitch centre, both ends averaged. So a straight hit has 10.06 m (half a pitch) added to the ground's straight figure, a hit behind the wicket has it taken off, and a square hit gains only the hypotenuse — well under a metre. Same convention as the game.
What “clears” means here. Cleared means the ball would land past the site's stored figure. 105 of the 121 grounds are measured from satellite imagery to the rope or perimeter fence, and a fence figure is an upper bound on the boundary in play — so a hit that “only just” falls short here may well have been six on the day. Ropes also come in for T20s. Every ground page says which kind of figure it carries; see where the numbers come from.