GST / VAT Calculator

Forward (add tax) and reverse (extract tax) in one tool — works for any rate.

Quick answer: Free GST/VAT calculator: add tax to a net price or remove (reverse) tax from a gross price. Instant net, tax and gross amounts.

Net (before tax)
Tax amount
Gross (with tax)

How to use

  1. Open this page on any device — no signup needed.
  2. Fill in the fields above.
  3. Get your result instantly — nothing is uploaded.

About this tool

GST/VAT calculators solve two problems: adding tax to a net price, and extracting the tax portion from a gross (tax-inclusive) price. Reverse calculation divides by (1 + rate), because the gross already contains the tax. Common rates: India GST 5/12/18/28%, UK VAT 20%, EU VAT 17–27%, Pakistan GST 18%.

FAQ

How do I remove GST from a total?
Divide the gross amount by (1 + rate/100). Example: remove 18% from 1180 → 1180 / 1.18 = 1000 net, 180 tax.
Which rates are supported?
Any custom rate — preset buttons for common ones (5%, 12%, 18%, 20%, 28%) are provided.
Does it work for VAT too?
Yes — VAT, GST and sales tax all use the same percentage math.

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