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Average Share Price Calculator - Stock Cost Basis

Calculate average cost per share from multiple buys and compare the position with a current or target price.

Cost basis

Average Share Price Calculator

Calculate average cost per share from multiple buys, then compare it with a current or target price.

Buys

One trade per line, like 10 @ 100

Current or target price
Total shares18Total cost$1,810.00Average cost$100.56Unrealized P/L$170.00

For education and planning only. This tool does not provide investment, tax, or financial advice. Verify assumptions and consult a qualified professional for decisions involving money.

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How the average share price calculator works

Enter the stock values requested by the calculator.

The result updates in your browser using the values you entered.

Review the result as informational planning data, not investment advice.

Frequently Asked Questions

Is this investment advice?

No. This tool is for education and planning only. It does not recommend buying, selling, or holding any security.

Does it use live market data?

No. This calculator uses the numbers you enter and does not fetch live quotes.