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GST / VAT Calculator

Free GST and VAT calculator. Add or remove tax from any amount. Supports any tax rate — GST, VAT, sales tax.

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GST / VAT Calculator
Free · Instant · No Signup

Formula

Formula
Tax = Amount × Rate ÷ 100 | Total = Amount + Tax
To add tax: multiply amount by rate/100, add to original. To extract tax from total: Pre-tax = Total ÷ (1 + rate/100). Tax = Total − Pre-tax.

Frequently Asked Questions

What is GST?+
GST (Goods and Services Tax) is a tax on goods and services. Rates vary by country: India 5-28%, Australia 10%, UK VAT 20%, Pakistan 17%.
How do I calculate 18% GST?+
Tax = Amount × 18/100. Total = Amount + Tax. Example: Rs.1000 + 18% = Rs.180 tax, total Rs.1180.
How do I remove GST from a total?+
Pre-tax = Total ÷ (1 + Rate/100). Example: Rs.1180 ÷ 1.18 = Rs.1000 pre-tax.
Is this GST calculator free?+
Yes, completely free with no signup required.

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