GST Calculator
Add or remove GST from any amount. Supports the current GST slabs (5%, 18%, 40%) and the older 12% and 28% rates for pre-September 2025 invoices. Find the base price from a GST-inclusive total (e.g. ₹10,000 ÷ 1.18) with CGST, SGST and IGST breakdown.
Quick answer:GST (Goods and Services Tax) in India is calculated as: GST Amount = (Original Price × GST Rate) / 100. To add GST: Final Price = Original Price + GST Amount. To remove GST from an inclusive price: Original Price = Inclusive Price / (1 + GST Rate/100). For example, ₹10,000 inclusive of 18% GST has a base price of ₹8,474.58 and GST of ₹1,525.42. Current slabs are 5%, 18% and 40% (since 22 September 2025); the old 12% and 28% rates are kept for older invoices.
How we calculate this →Azam Sharieff· Finance & Tools Reviewer
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Make Invoicing Painless
If you run a small business or work as a freelancer in India, dealing with GST (Goods and Services Tax) invoices can be a massive headache. Doing the math in your head to pull 18% tax out of a flat fee usually leads to messy decimals and rounding errors.
This calculator is built to instantly do the heavy lifting for you. Just punch in your numbers, hit a button, and you'll get the exact base price, the total tax amount, and the precise CGST and SGST split you need to write on your bill.
Works Both Ways
Sometimes you have a raw product cost and need to figure out how much to charge your customer after adding tax. Other times, you agree on a flat 'inclusive' price with a client, and you need to reverse-engineer the math to find out what your actual pre-tax revenue is.
Our tool handles both scenarios perfectly. The 'Add GST' function builds your final price, while the 'Remove GST' function acts like a tax extractor, pulling the exact government share out of a final number.
GST calculator in Hindi and a worked example
Take an invoice of ₹50,000 at 18% GST. Adding GST gives ₹9,000 of tax and a total of ₹59,000, split as ₹4,500 CGST and ₹4,500 SGST within a state. If the same ₹59,000 is a GST-inclusive price, Remove GST gives a base of ₹50,000 because 59,000 ÷ 1.18 = 50,000. Always divide by 1 plus the rate rather than subtracting 18% from the total.
हिंदी में पूरा तरीका, फ़ॉर्मूला और उदाहरण देखने के लिए जीएसटी कैलकुलेटर (हिंदी) खोलें।