units in BL are TU (torque units)
if you wish to convert to meters, I'd recommend using width of legos
1 BL stud is 0.5 TU
1 lego stud is 8 mm
so 0.5 TU is 8 mm, or 1 TU is 16 mm
why must you use meters/feet instead of just using studs? studs makes much more sense in this setting