New* idea: Split the difference.
One meter is 39.37 inches, so three meters is 118.11 inches: close enough to 120.00 inches (= 10 feet) to not worry about or bother with.
Then one square is 5 feet, or half of 3 meters, or 1.5 meters. Simple.
Of course, they wouldn't do that, because calling "one square" equal to "a meter and a half" would be too finicky for most people.
("Sesquimetric," anyone?)
* new idea not really all that new
I gotta admit this entire topic has got me bamboozled. I just dont understand people interest in measurement.
What difference does it actually make what measurement unit you use. At the end of the day, relativity of range vs time is all that really counts. In fact, back in 3.0 we gave up on using "real" measurements and started referring to these things as "distance thingies" and "time thingies".
So distance from one point to another was X "distance thingies", so can my bow reach X "distance thingies", or how many "time thingies" will it take me to get there.
Realistically it didn't even matter in game terms that these didn't equate to any real world measurements, the game works no matter what distance unit you use, as long as its consistent through the whole game.
Ahh the metric system. So good to be born in Australia and not have to deal with anything elseObviously for many American and English people using metres is equally strange. D&D is an american game, so... I am resigned to convert on the fly
I think all overland maps should be scaled in furlongs.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.