Nobody wants to waste money and being in the cloud is no exception! Luckily for us Azure is very efficient in tracking usage patterns and its associated costs, in this case, potential cost savings.
You can find this information under Help + Support.
Naturally the cost of Azure SQL Database directly relates to what tier and performance level you are using. Starting from the least expensive basic database to the more premium ones I thought it would be worthwhile capturing the costs (GBP) across all tiers.