A ton of 3/4" crushed concrete costs per ton; What is the weight of concrete per cubic meter? A cubic meter of concrete weighs 2400 kg. There are 1000 kg in a metric ton. 2400kg / 1000kg = metric tons. A cubic meter of concrete also weighs metric tons. What is the weight of concrete block? There are a few different sizes of concrete blocks. I'll include some of the more popular sizes below.