Stock gain loss calculator

Calculate stock gain/loss from history transactions

As of June 2026, Stock gain loss calculator has 7 users and a 5.00/5 rating from 1 reviews in the Productivity category.

Productivity

Chrome Web Store ↗.crx

Users−12.5%

Rating0%

5.00

1 reviews

Reviews0%

Version

1.1.3

Manifest V3

History

3 snapshots

Tracking since Apr 21, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 21, 2026	8	5.00	1	1.1.3
May 6, 2026	8	5.00	1	1.1.3
Jun 4, 2026	8	5.00	1	1.1.3
Now	7	5.00	1	1.1.3

Permissions & access

Permissions: storage
Host access: None declared

Screenshots

About

Stock Gain/Loss Calculator

Whatever brokerage you use, they only track your possessions while holding shares, once you sell, you lose track of your history performance. This tool gives you a real picture of how you performed over the history, purely based on transactions. 

What is true cost basis?
True cost basis is the net cost you have spent on a stock to own a certain amount of shares. Say you buy 10 shares of TSLA at $100, and sell 5 shares at $200, the true cost basis for the remaining 5 shares is 10x$100 - 5x$200 = $0, which means your true cost to own 5 shares TSLA is 0.

* No registration needed
* No need to access to brokerage account

--------Version 1.1.3---------------
* Add button to clear all transactions at once

--------Version 1.1.2---------------
* Add button to export transactions to csv