I'm using weight for calculating shipping cost. For example, 500g $10, 1000g $15, 1500g $20 etc. Is it possible for me to define a formula into the cost e.g. increment $5 for each 500g. I don't have maximum weigh on my parcel because I can always split them into 2 parcels. I don't know what is the maximum weight I should define to if I need to set them one by one.

Any expert can help?