CGST · SGST · IGST · Reverse GST · Invoice

GST Calculator India
+ free invoice generator

Calculate GST inclusive or exclusive, get CGST/SGST/IGST breakup instantly. Generate and download a GST invoice PDF for free.

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0% 3% 5% 12% 18% 28%
0% 3% 5% 12% 18% 28%

📄 Invoice details

How to use

01

Choose mode

Add GST to a base price, remove GST from an inclusive price, or compare all slabs at once.

02

Enter amount

Type the amount and select the GST rate — 0%, 3%, 5%, 12%, 18% or 28%.

03

Get breakup

See the CGST + SGST or IGST split instantly along with the total payable amount.

04

Generate invoice

Click Generate Invoice, fill your business details, add items, download PDF — free.

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Frequently asked questions

What is the difference between CGST, SGST and IGST?
For sales within the same state, GST is split equally into CGST (Central GST) and SGST (State GST). For sales between two states, only IGST (Integrated GST) is charged — equal to the full GST rate.
What is reverse GST calculation?
Reverse GST means finding the base price from a GST-inclusive price. For example, if a product costs ₹1,180 including 18% GST, the base price is ₹1,000 and GST is ₹180. Use the Remove GST tab for this.
Is the invoice generated here legally valid?
The invoice PDF contains all required fields — GSTIN, invoice number, date, item details, GST breakup. However, you are responsible for ensuring compliance with GST rules in your state. For large businesses, consult a CA.
Which GST rate applies to my product?
GST rates vary by product category. Essential goods like food are at 0–5%. Most services are at 18%. Luxury goods and tobacco are at 28%. Check the official GST rate finder on the GST portal for your specific HSN/SAC code.