Free tools

Free Business Calculators for Shops

Simple, free business calculators for everyday shop maths: make an invoice, work out a qist plan, check your margin or add sales tax. No sign-up, and nothing you type leaves your browser.

Free business calculators: hands working on a calculator at a desk

From PKR 2,500/mo · USD $10/mo

Pick a tool

Free invoice generator

Make a clean bill or invoice and print it or save it as PDF.

Qist / installment calculator

Monthly instalment, profit and a full payment schedule.

Profit margin calculator

Margin, markup and the selling price you need.

Sales tax calculator

Add or remove sales tax at 18% or any rate you enter.

Free barcode generator

Code 128, EAN-13, UPC-A or QR labels with name and price, as PDF or PNG.

Why we built these

Shopkeepers ask us the same questions every day: what should the monthly qist be, what price gives a 20% margin, how much tax is inside this bill. These tools answer them in seconds. They are free, and you do not need theDukanPOS to use them.

Free business calculators: list of invoice, qist, margin and sales tax tools
Free tools

Nothing is saved or sent

Works on your phone

English and Urdu

Instant results

Print or save as PDF

Free, no sign-up

From calculators to a full system

Calculators help with single questions. When you are doing these sums for every bill, a POS does them automatically: qist plans and collections, stock and cost prices, and profit reports. You can also download our free khata template or browse all resources.

Frequently asked questions

They use standard formulas and show the method on each page. Always round and check figures for your own case.

Yes. All tools work in a mobile browser.

No. The tools are free and need no sign-up.

Ready to run your business on theDukanPOS?

Try every feature free for 15 days. Questions? Call or WhatsApp 0312 7032292 and talk to a real person.