Wrong measurement of diagonals in the grid

Hello, I don't know whether it works like that for all games, but in Pahtfinder and D&D a diagonal counts as 7.5 feet (rounded down to the closest multiple of 5 ft, so 1 diagonal is 5 ft and two diagonals are 15ft). I was wondering why the measurement tool doesn't take this into account, or if there's a why to make it calculate distances like that. Thanks in advance

You can adjust how Roll20 calculates distance by changing the value of "Diagonals" to the 3.5E/Pathfinder option under the page settings for each page in the campaign. The Wiki can walk you through it.

Fair enough, thank you ;)