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Average Cost Calculator

You can use an average cost calculator to determine the average share price you paid for a security with multiple buys. This can be handy when averaging in on a stock purchase or determining your cost basis. For more information on cost basis check out this investopedia article.

For a more robust tool you may find this Excel (.xls format) version handy: Cost Basis Calculator Excel. This was tested to work in both Microsoft Excel and Open Office.

Cost Basis Calculator

This is the Cost Basis Calculator as it appears in Excel. Instructions on use are also included.

Please note that the form below is just a very simple tool for quick cost basis calculating. You can find your average cost per share over 2 purchases.

You may also be interested in the capital gains calculator.

Input your data below

If I have shares bought at $

Later on I buy shares bought at $

As of I have shares at an average price of $