GST / VAT Calculator
Add or remove GST (or VAT) from any amount instantly. Supports all Indian GST slab rates with forward and reverse calculation. Free, no signup.
Base amount
₹1000.00
GST @ 18%
₹180.00
Total
₹1180.00
GST is added on top of your amount.
How is GST calculated?
Add GST (exclusive): GST = Amount × rate ÷ 100, Total = Amount + GST.
Remove GST (inclusive): Base = Amount × 100 ÷ (100 + rate), GST = Amount − Base.
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Frequently asked questions
How do I calculate GST from a total that already includes GST?
Select Remove GST and enter the total. The tool works backward to show the base amount and the GST portion using the formula Base = Total × 100 ÷ (100 + rate).
What are the GST slab rates in India?
India has four main slabs: 5%, 12%, 18%, and 28%. Essential items may be taxed at 0% (nil-rated), while luxury and demerit goods fall in the 28% slab.
Can I use this for VAT too?
Yes. The same formulas apply to VAT and other percentage-based sales taxes, so just set the rate that applies to your country.
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