GST Calculator
Add or remove GST in seconds, at any rate, with the CGST/SGST split.
GST details
Mode
GST rate
Total amount
₹11,800
Goods and Services Tax (GST) is India's unified indirect tax. Whether you're a business issuing invoices or a shopper checking a bill, this calculator handles both directions: add GST to a base price, or work backward to find the base price hidden inside a GST-inclusive amount.
How GST is calculated
To add GST, multiply the base price by the rate:
GST = base × rate% ; Total = base + GST
To remove GST from an inclusive amount:
Base = total × 100 / (100 + rate)
For sales within a state, GST is split equally into CGST and SGST. For inter-state sales, a single IGST applies.
Frequently asked questions
What are the GST rate slabs in India?+
The main slabs are 5%, 12%, 18% and 28%. Essentials attract lower rates while luxury and 'sin' goods attract the highest. A few items are exempt or zero-rated.
What's the difference between CGST, SGST and IGST?+
For a sale within the same state, GST splits into CGST (central) and SGST (state) equally. For a sale between states, a single IGST applies at the full rate.
How do I find the price before GST?+
Use 'Remove GST' mode and enter the final GST-inclusive amount. The calculator extracts the original base price and the tax portion.
Who needs to charge GST?+
Businesses above the turnover threshold must register for and charge GST. Thresholds differ for goods and services and by state — check the current rules for your case.
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