To calculate your Total Estimated Anesthesia Cost, add 30 minutes (0.5) to the Estimated Dental Treatment Time provided to you by your Dentist. For example, if your Estimated Dental Treatment Time is 1.5 hours, add 30 minutes (0.5) to that, for a total of 2.0 hours. Then enter that amount into the sliding calculator to get your Total Estimated Anesthesia Cost. Please note, this amount is an ESTIMATE. Your final cost will depend on actual times. That means, you pay less if the actual time is less than the estimate, and pay the actual time if its more than the estimate.