Stock Average Cost Calculator

How to work out your average cost per share

1. List each purchase on its own line: the number of shares and the price per share.
2. Add the fee per purchase if you paid one.
3. Enter the current price to see your gain or loss.

Frequently asked questions

Can I use it to average down?

Yes. Add the purchase you are thinking of making as a new line to see your new average cost.

Are my numbers sent anywhere?

No. Everything is worked out in your browser and nothing is stored or uploaded.