E-commerce profit calculator

This is a single browser-based page built to track your store's profitability. It does not need installation on a server and keeps your figures inside your own browser.

• Products: calculates the precise profit and margin for each item you stock.
• Sales: record a transaction and it works out the resulting revenue and profit automatically.
• Expenses: keep a record of overheads such as advertising and packaging costs.
• Dashboard: view total revenue, net profit and your best-selling products in one place.

What this tool does and does not do

The calculator behaves like a piece of software and opens like a standard file, but it is not an inventory system, so stock levels are not tracked. It is not linked between devices either: each browser holds its own separate set of records. There is no subscription involved, since you obtain it once and keep it permanently.

Advantages

• No account setup required
• No recurring payment
• Your sales and profit figures stay private, with no outside party able to view them
• Functions without an internet connection

The trade-off to understand

Because everything is stored locally, clearing your browser data will erase your records. Opening the file in another browser gives you a fresh, empty version, and moving the file to a different machine does not carry the data with it.

How to safeguard your data

Create a backup regularly, for instance every week or after any notable entry, via the settings menu's export option, which produces a small downloadable file. Keep this file somewhere you already store important documents, such as cloud storage, an external drive, or your email. Restoring is just as simple: choose the restore option in settings and select your saved file to bring everything back.

A useful habit

Always export a backup before resetting to sample data or carrying out a major reorganisation. The export takes moments, whereas rebuilding a year's worth of sales entries does not.

What you provide

To get started, supply the domain this order relates to along with your brief describing your requirements.

What happens after you buy

Your order opens its own thread here the moment it is paid, and everything about that order - questions, changes and the final report - happens in it.