Coinsurance Calculator: Accurate Coverage Costs

This tool calculates your out-of-pocket expenses based on your coinsurance rate and medical costs.

How to Use the Coinsurance Calculator

The coinsurance calculator helps you estimate the amount you will need to pay out-of-pocket for a medical service after considering your deductible, coinsurance rate, and the policy limit.


  • Enter the Total Cost of the Service: This is the full amount billed for the medical service.
  • Enter the Coinsurance Rate: This is the percentage of the cost you are responsible for after meeting your deductible.
  • Enter the Deductible Amount: This is the amount you must pay before your insurance begins to cover the costs.
  • Enter the Policy Limit: This is the maximum amount your insurance policy will pay for a covered service.
  • Click the ‘Calculate’ button to see the result.

Explanation of the Calculation:

The calculator first subtracts the deductible amount from the total cost of the service. The resulting amount is then multiplied by the coinsurance rate to determine the amount you must pay. If this amount exceeds the policy limit, the result will be capped at the policy limit. If the calculation yields a negative amount, the result will be set to 0.


This calculator provides an estimate and does not account for all nuances in insurance policies. The exact amount you owe could vary based on other factors such as policy exclusions, coverage terms, and additional out-of-pocket maximums. Always consult with your insurance provider for precise information.

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