the smallest measurement in the us
21mm
346.36 square MM.
Because you haven't told us what the measurement is.
Customary Units
12x1.5 or 21mm 12x1.5 or 21mm
0.021m
the smallest measurement in the us
21mm
21MM
27mm x 21mm
21mm
2.1 cm 10mm = 1cm
21mm
346.36 square MM.
G's
Use the formula: V= 4/3*pi*r^3 I would convert 21mm to metres straight away. 21mm=0.021m Then apply the formula and you get Vol=0.000038792m^2 to 10 sig figures