Base amount₹0Principal invested
GST Calculator India — Add or Remove GST on Any Amount
Calculate GST inclusive or exclusive price for 5%, 12%, 18%, and 28% slabs
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GST Calculator
Max ₹1 Cr
₹
One ThousandAdjust the inputs above to see your results here.
GST amount₹0Returns generated
Estimated
Total amount₹0Estimated final valueGST Summary
Updated instantly as you change values.
Investment Breakdown
Base amount
₹00%
GST amount
₹00%
Key Insights
About this calculator
In-depth guide for the GST calculator — formulas, examples, and official sources for India.
Introduction
GST exclusive means tax is added on top of the base price. GST inclusive means the price already contains tax, and you need to split the base and tax components.
What this calculator does
Add or remove GST at 5%, 12%, 18%, or 28%. India uses multiple GST rates such as 5%, 12%, 18%, and 28% depending on the product or service category.
Who should use this calculator
Borrowers, investors, and taxpayers planning loans, returns, or tax in India. Use this tool if you want a clear estimate before speaking with a bank, post office branch, or tax advisor.
- Base ₹1,000 + 18% GST → Total ₹1,180
- Inclusive ₹1,180 at 18% → Base ₹1,000 + GST ₹180
Formula used
Formula
GST Amount = Base Amount × GST Rate / 100Variable explanation
- Input: Amount (₹)
- Base price or GST-inclusive price depending on mode.
- Input: GST rate (%)
- Applicable slab — 5%, 12%, 18%, or 28%.
- Input: Mode (toggle)
- Add GST (exclusive) or remove GST (inclusive).
- Output: Base amount (₹)
- Taxable value before GST.
- Output: GST amount (₹)
- Tax component.
- Output: Total (₹)
- Final invoice amount.
Example calculation
- Step 1
Choose whether your amount is GST exclusive or inclusive.
- Step 2
Enter the amount and select the GST slab.
- Final answer
For exclusive: total = base + GST. For inclusive: base = total ÷ (1 + rate/100).
How to use
Locate the calculator form at the top of this page.
Enter your values using the units shown (₹, %, years, or as labelled).
Review the instant result, charts, or schedules in the output panel.
Adjust inputs to compare scenarios before making a financial decision.
Benefits
Free to use with instant browser-based results — no signup.
Built for Indian rates, tax years, and units.
Includes worked examples and FAQs on every page.
Limitations
Single GST rate on entire amount — composite supplies not split
Compensation cess on sin goods adds extra tax not modelled here.
Tips
Restaurants and hotels may charge GST on different components — verify the invoice breakdown.
Export invoices are zero-rated — do not apply domestic GST slabs.
Keep GSTIN on invoices above threshold for ITC claims if you are a business.
Common mistakes
Applying CGST+SGST percentages separately instead of combined GST rate.
Using 18% on items actually taxed at 12% or 5%.
Frequently asked questions
Can I calculate reverse GST?
Yes. Choose GST inclusive mode to find the base amount and tax portion from a final price.
Is this suitable for GST filing?
This is a quick helper tool. For official GST filing, use your accountant or GST portal records.
What are current GST slabs in India?
Common rates are 5%, 12%, 18%, and 28%. Some items are exempt or taxed at 0%.
Is CGST different from GST?
CGST and SGST are components of GST for intra-state supply. Enter the combined rate (e.g. 9%+9%=18%).
How is GST calculated on discounts?
GST is usually on the discounted price if discount is known at supply. Enter the net taxable value.
Does this include IGST?
IGST applies to inter-state supply at the same nominal rate. Calculation method is identical.
Related guides
Government references
- GST Council rate notifications
- CBIC — cbic.gov.in
- CBIC — (GST rate notifications)cbic.gov.in
Conclusion
Quickly add or remove GST at Indian slab rates for invoices, shopping, and business quotes. For GST return filing, use the official GST portal or your CA.