How to calculate from SOC % to t/ha?

Example: your soil measured from 0-30 cm depth, bulk density is 1,4 g/cm3, soil organic carbon 1,2 %

SOC t/ha = 10 000 m2 (in 1 ha) x 0,3 m (soil depth) x 1,4 g/cm3 (bulk density) x 1,2 % (SOC%) / 100 = 50,4 t/ha