Which also lets you caclulate the weight of a document (say for shipping): Standard printer paper is 80g/m2: A1 = 40g, A2 = 20g, A3=10g and A4=5g. Or, alterna

Which also lets you caclulate the weight of a document (say for shipping): Standard printer paper is 80g/m2: A1 = 40g, A2 = 20g, A3=10g and A4=5g. Or, alternatively, crumple up A4 sheets for quick 5g weights.