How to check the quantity of steel while purchasing?

Never ever trust any weighment at any shop. 70% of the weighments have found to be tampered with. Always check the weighment of steel using Wt./m of steel for different diameters of rebars.

1. 8 mm – 0.40 Kg/m
2. 10 mm – 0.62 Kg/m
3. 12 mm – 0.89 Kg/m
4. 16 mm – 1.58 Kg/m
5. 20 mm – 2.47 Kg/m
6. 25 mm – 3.86 Kg/m
7. 32 mm – 6.32 Kg/m