Cost Basis Calculator
Calculate your weighted average cost basis from multiple buy entries. Enter each purchase quantity and price to see your true average entry.
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FAQ
What is cost basis and why is it important?›
Cost basis is the weighted average price you paid for an asset across all your purchases. It determines your unrealized profit or loss and is essential for tax reporting when you eventually sell.
Does this account for fees?›
This calculator computes the weighted average of the prices you enter. If you want fees included in your cost basis, add them to the per-unit price of each entry before inputting.