Is it safe to type my supplier costs into an online margin calculator?
With this calculator, yes: the calculation runs inside your browser, and the numbers you type are neither sent to a server nor saved. You can confirm that yourself in about a minute, as shown below.
Why the question deserves asking
What you pay your supplier is what sets you apart from competitors. Anyone who learns you buy oud at a certain price from a certain source knows your margin and perhaps your source. So hesitating before typing those numbers into an unfamiliar site is sensible. Some online tools send what you type to their servers to calculate it there, and some ask you to sign in and keep your calculations.
What happens to your numbers here
- The formula is simple subtraction and division. It runs entirely in code inside your browser, so nothing needs to be sent anywhere.
- There is no sign-in and no account, so there is nowhere your figures could be tied to your name.
- The fields are not saved. Reload the page and you see the default example again, cost 80 and price 100, not what you last typed.
- Site visit statistics, if you accept them, record that a page was opened or a tool was used, never any number you type. The details are on the privacy page.
Check it yourself in a minute
- Open the Profit margin calculator and let the page finish loading.
- Go offline: turn off Wi-Fi or switch on airplane mode.
- Type a cost and a price. The results appear instantly although you are offline. A tool that sends its numbers to a server would stop working here.
- On a computer, you can also open the browser's developer tools, choose the Network tab and type in the fields: no request carrying your numbers appears.
What stays your responsibility
The calculator does not send your numbers, but what you do with the result afterwards is up to you:
- The copy button puts cost, price and margin on your clipboard. Mind where you paste it, and keep it out of WhatsApp groups that include more than your partners.
- A screenshot of the result stores the figures in your photo gallery, which may back up to cloud storage automatically.
- On a shared computer, close the tab when you finish so the next person does not see your last entry in an open page.
A rule of thumb for any tool
Before typing sensitive figures into any online tool, ask: does it require an account? Does it keep working offline once loaded? Does it say plainly where the calculation happens? A tool that runs in the browser, says so clearly and passes the offline test is the right home for your cost figures.
Common questions
Do I need an account to use the calculator?
No, you open the page and start typing.
Can I go back to earlier calculations?
No, because nothing is saved. To keep a result, copy it with the copy button and store it somewhere you trust.