What is a GST Calculator?
Add mode: tax = amount × rate. Remove mode: base = amount / (1 + rate).
How is it calculated?
Enter amount and GST rate. Use the mode field: 0 = add GST, 1 = remove GST.
Formula used
GST = amount × rate/100 (add)
Base = amount / (1 + rate/100) (remove)
Base = amount / (1 + rate/100) (remove)
Worked example
₹10,000 at 18% add-GST becomes ₹11,800 with ₹1,800 tax.
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Frequently asked questions
Are results guaranteed?
No. These are planning estimates based on the numbers you enter.
Grow Money Calculator provides general financial calculation tools for educational and planning purposes. Results are estimates based on the information you enter and may differ from actual lender, bank or investment-product calculations. This is not a loan offer or investment advice. Read the full disclaimer.