Convert mg/m3 to tonne/cubic metre
The answer is 1000000000. We assume you are converting between milligram/cubic metre and tonne/cubic metre . You can view more details on each measurement unit: mg/m3 or tonne/cubic metre The SI derived unit for density is the kilogram/cubic meter. 1 kilogram/cubic meter is equal to 1000000 mg/m3, or 0.001 tonne/cubic metre.