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Free GST calculator
Add GST to a price or pull it back out of a tax-inclusive amount, at any slab, with the CGST and SGST split shown for you. Instant, free and nothing is stored.
- Taxable value
- ₹0.00
- CGST
- ₹0.00
- SGST
- ₹0.00
- IGST
- ₹0.00
- Total
- ₹0.00
Worked out in your browser. Nothing you type is sent to us or saved.
How to use it
How to use the GST calculator
Step 01
Pick a direction
Enter your business name, GSTIN and address, then the customer you are billing. The preview updates as you type.
Step 02
Enter the amount
Choose Add GST if your price excludes tax, or Remove GST if the figure you have already includes it.
Step 03
Read the split
Type the amount and pick the slab, from zero to twenty-eight per cent.
The arithmetic
How to calculate GST
Two calculations, depending on whether the figure you are starting from already has tax in it.
Adding GST to a price
GST = amount × rate ÷ 100
Total = amount + GST
₹1,000 at 18% gives ₹180 tax and ₹1,180 to pay. Within one state that is ₹90 CGST and ₹90 SGST.
Removing GST from a price
Taxable = total ÷ (1 + rate ÷ 100)
GST = total − Taxable
₹1,180 inclusive of 18% works back to ₹1,000 taxable and ₹180 tax. This is the reverse calculation.
Quick reference
GST rates in India
| Rate | Typically applies to | Intra-state split |
|---|---|---|
| 0% | Fresh produce, unbranded staples, some essentials | Nil |
| 5% | Packaged food, small restaurants, transport | 2.5% + 2.5% |
| 12% | Processed food, business services, apparel above threshold | 6% + 6% |
| 18% | Most services, software, electronics, professional fees | 9% + 9% |
| 28% | Luxury goods, aerated drinks, tobacco, large vehicles | 14% + 14% |
Rates change. Confirm the slab for your HSN or SAC code before filing. Inter-state supplies use IGST at the full rate instead of the split shown.
FAQ
GST calculator questions, answered
How do I remove GST from a price?
Divide the tax-inclusive amount by one plus the rate. At eighteen per cent, an inclusive price of ₹1,180 becomes ₹1,000 taxable plus ₹180 tax. Switch the calculator to Remove GST and it does this for you.
When is it CGST and SGST rather than IGST?
When the supply stays inside one state you charge CGST and SGST, each half the total rate. When it crosses state lines you charge IGST at the full rate instead. Tick inter-state and the calculator shows it the right way round.
What are the GST slabs in India?
The common rates are 0, 5, 12, 18 and 28 per cent. Which one applies depends on what you are selling, identified by its HSN code for goods or SAC code for services.
Is my data stored?
No. The calculation happens in your browser and nothing is sent to us or saved.
Is this GST calculator free?
Yes, with no sign-up and no limit on how many calculations you run.
Can I stop calculating GST by hand?
Yes. Save each item once in Pinvoice with its slab and HSN code, and every invoice applies the right tax automatically, including the intra-state and inter-state difference. It is free.
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