Commercial margin calculator
Work out your gross margin, your margin rate (on cost) and your markup (on selling price) — or start from a target rate and get the price. Selling at 150 € from a 100 € cost is a 50 % margin but a 33 % markup, and confusing the two quietly erodes every quote. A margin is a private figure, so the numbers stay on your device.
- 100% local
- Free · no account
- Instant result
This tool runs entirely in your browser — nothing is sent to a server.
The margin rate and the markup rate are often confused, and the mistake is costly: the margin expressed as a share of the purchase cost (margin rate) gives a flattering figure compared to the same margin expressed as a share of the selling price (markup rate). Selling a product bought for €100 at €150 gives a 50 % margin rate… but a 33 % markup rate.
This calculator displays both, along with the multiplier, from your cost and selling price. In reverse mode, it computes the selling price to reach a target markup rate.
How it works
Type the figures or drop the file you want to process — the tool checks them as you go.
Everything is computed directly in your browser. Nothing is sent to a server.
The result appears instantly, with the detailed breakdown ready to copy, download or keep.
Why use this tool
No account, no download, no limit: the result appears as soon as you enter your data.
Every rule, algorithm and check reflects what we use ourselves every day at Flexina.
The calculations follow the official standards, and the step-by-step detail lets you double-check the outcome.
What does running it locally bring you?
Files, figures and documents never leave your device: nothing is stored, nothing is sent.
Once the page is loaded, you can cut the network: the tool keeps working.
No upload, no account, no third-party server in between: results stay fast and fully private.
Frequently asked questions
Margin rate or markup rate: which one to use?
The markup rate (margin ÷ selling price) is the reference in retail and income statements; the margin rate (margin ÷ cost) is common in trading. The key is knowing which one you use — both are shown here.
Is the calculated margin net or gross?
Always reason net of VAT: the VAT collected is not revenue, you hand it over. So enter the net cost and net selling price.
What is the multiplier?
The ratio selling price ÷ purchase cost. A multiplier of 2 (doubling) corresponds to a 50 % markup rate.