Area : m², a, ha, ft², yd², acre Length : cm, m, inch, ft, yd, mile Volume : cm³, m³, ml, l, gal, in³, ft³, yd³ Weight : mg, g, kg, ton, grain, oz, lbm, Temperature : ° C, ° F, K, ° R Ratio : 100: 10 = 10: X