Units converted are are meters, kilos, seconds & newtons in the current TB physics engine, you can work out everything from that
The physics engine's last stable version was 3 year ago, so it's unlikely it'll ever change again

CBA looking up TBN stuff, but it also uses meters for distance units so it's probably a safe to say it also uses metric SI units for everything else

But yeah, Toris are gigantic & literally hit like trucks. Makes all the attempts at realistic movement funnier when you know how it all works