If you want a good overview of how you can prevent unexpected charges for the Azure services then this article has some useful information: https://bit.ly/2WiZcte. It’s a 12 minute read with the following sections: getting estimated costs, monitoring costs, optimising and reducing costs, and analysing unexpected charges.
Microsoft launched Azure Reserved Instances in November 2017 giving customers a more cost-effective way of buying Azure base instance virtual machines. The Azure Calculator has been updated to show relative pricing between the regular pay-as-you-go option for virtual machines and 1-year or 3-year Reserved Instances.
Find the Azure Calculator here: http://bit.ly/AzurePricingCalculator.
The Azure Cost Estimator is now deprecated (http://bit.ly/AzureCostEstimator).
What are your alternatives to get estimated pricing for Azure? The public Azure Pricing Calculator (http://bit.ly/AzurePricingCalculator) is a good option or, if you’re a Microsoft partner, then you can request access to the Azure Channel Calculator (http://bit.ly/AzureChannelCalculator).
The Microsoft Azure Cost Estimator tool is updated for July 2015. This is a nice tool for helping you to estimate the cost of running an environment in Microsoft Azure. You can scan your on-premises environment to create an estimate or create a completely customised scenario.
Download the tool here: http://bit.ly/1MjzWs5.