GST Calculator
Add GST to a price or extract the GST included in a price — at whatever rate applies to you.
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What does the GST Calculator do?
To add GST, multiply the net amount by (1 + rate ÷ 100). To remove GST from an inclusive price, divide by (1 + rate ÷ 100) — not simply subtract the percentage, which is a common mistake. The calculator shows the net amount, tax and gross total.
The default rate is 18%, Pakistan’s standard federal sales tax rate on goods at the time of writing, but rates differ for specific goods, for services (set by provinces) and in other countries, and they change in budgets. Always enter the rate that applies.
How to use the GST Calculator
- Enter the amount.
- Enter the GST/sales tax rate.
- Choose “Add GST” for net prices or “Remove GST” for tax-inclusive prices.
- Read net, tax and gross amounts.
Examples
Adding tax
10,000 + 18% → GST 1,800, total 11,800.
Removing tax
11,800 including 18% → net 10,000 (11,800 ÷ 1.18), GST 1,800.
Common use cases
- Preparing invoices and quotations
- Checking tax on receipts
- Pricing products tax-inclusive
Features and benefits
- Private by design — your data is processed on your device and never uploaded.
- Free with no account, no watermark and no usage limits.
- Works on phones, tablets and desktops in any modern browser.
Limitations to know
- Tax rules (exemptions, reduced rates, withholding) are not modelled. Check FBR or your provincial revenue authority for current rules.
Helpful guides
Frequently asked questions
How do I remove GST from a price?
Divide the inclusive price by 1 + rate/100. For 18%: price ÷ 1.18.
Why not just subtract 18%?
Because GST was calculated on the net price, not the gross. Subtracting 18% of the gross removes too much.
Is the default rate always correct?
No — it is a starting point. Enter the rate that applies to your goods or services.
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