GST Calculator
Instantly add or remove GST to find your net amount, total tax, and gross price.
Adds GST to the base price to get the total.
New GST slabs from 22 Sep 2025: 5%, 18% and 40% (3% for gold). For old bills at 12% or 28%, choose Custom.
Calculation Summary
How to Use GST Calculator
Find the GST on any price — or take GST out of a total — using the new GST slabs. You also see the CGST and SGST split.
Enter the Amount
Type the price before tax, or the total that already includes GST.
Add or Remove & Pick a Rate
Choose "Add GST" or "Remove GST", then 5%, 18%, 40%, 3% or a custom rate.
See the Result
Click calculate to see the net price, GST, CGST, SGST and total.
Slabs
5% · 18% · 40% · 3%
Modes
Add or remove GST
Split
CGST + SGST
Copy
Summary
Price
100% free
Sign-up
Not needed
GST Calculator: Quick Reference
The key numbers and facts in one place.
| New main slabs (from 22 Sep 2025) | 5% and 18% |
|---|---|
| Luxury & sin goods | 40% |
| Gold & silver | 3% |
| Old 12% & 28% | Mostly removed — use Custom for old bills |
| Add GST | Total = Price × (1 + rate) |
| Remove GST | Price = Total ÷ (1 + rate) |
What Can You Use It For?
Popular ways people use GST Calculator.
Invoices
Work out tax for bills and quotes.
Shop Prices
Find the price before GST from an MRP.
Freelancers
Add 18% GST to service charges.
Compare Prices
See how much tax you pay.
Tips for the Best Result
- Use "Remove GST" when a price already includes tax (like MRP).
- Inside one state, GST splits into CGST + SGST; between states it's IGST at the full rate.
- For bills dated before 22 Sep 2025 at 12% or 28%, choose Custom.
Frequently Asked Questions
Quick answers about GST Calculator.
From 22 September 2025 most goods and services use 5% or 18%. Luxury and sin goods use 40%, and gold uses 3%. The old 12% and 28% slabs were mostly removed.
Multiply by 1.18. ₹1,000 + 18% GST = ₹1,180 (GST = ₹180).
Divide by (1 + rate). ₹1,180 ÷ 1.18 = ₹1,000, so the GST was ₹180.
For a sale inside one state, GST is split equally: half CGST (central) and half SGST (state). Between states it's charged as IGST.
Yes — pick Custom and type the rate. Useful for older invoices.
Yes, no sign-up.
No. It's a quick calculator — check rates for your exact item on the GST portal or with your accountant.
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