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GST Calculator

Add GST to a price or remove GST from an inclusive price, with the correct Indian GST slabs, instantly and privately. Pick a rate from 0.5% to 28% — or enter a custom value — and the calculator returns the GST amount, the net price and a clear formula breakdown. Whether you are invoicing, quoting a supplier or reconciling a bill, you get accurate results in your browser with nothing uploaded.

Mode

Amount (₹)

GST rate

What is GST?

GST stands for Goods and Services Tax, a single indirect tax that replaced older levies such as VAT and service tax across India. It is charged by the seller at the point of sale and paid to the government, and it applies to nearly every supply of goods and services. The key point is that GST is calculated on the price before tax — the base price — because the MRP in a shop is usually already tax-inclusive. This calculator handles exactly that: add GST onto an exclusive amount, or strip the tax out of an inclusive amount to reveal the base and GST. In India, intra-state sales are split into CGST and SGST (each half the rate), while inter-state sales carry a single IGST. Because the maths is identical for every slab, a GST calculator rules out guesswork and invoice errors.

Example

Add 18% GST to ₹1,000. The calculator gives a GST amount of ₹180 and a total of ₹1,180. Now switch to Remove GST and enter ₹1,180 — it returns a net (base) price of ₹1,000 and a GST amount of ₹180, confirming the reverse calculation balances.

Who is this GST calculator for?

GST touches almost every price and invoice in India, so this calculator is useful for anyone who buys, sells or bills. These are the people who reach for it most.

Students and young adults: See how much GST is already hidden in the price of a mobile phone, a restaurant meal or a train ticket, and learn how to calculate gst step by step before you pay.
Couples: Budget household and big-ticket purchases by working out the GST on furniture, electronics and appliances, so a quoted MRP never catches you out.
Salaried professionals: Verify GST on expense claims, reimbursement invoices and small freelance bills, splitting an intra-state sale into CGST and SGST exactly as your accounts team does.
Retirees: Confirm the tax embedded in daily essentials and services so you always know what you are really paying on every bill.

Common use cases

Preparing a GST invoice and splitting an intra-state sale into CGST and SGST.
Checking how much tax is already inside a quoted MRP before you buy.
Quoting a price and working backwards from an inclusive figure.
Reconciling GST paid on purchase bills for business filing.

Pro tips

Intra-state sales split the rate into CGST and SGST; inter-state bills carry only IGST.
Store MRP usually already includes GST — use Remove GST to find the taxable base.
Confirm the HSN rate for your goods; mobile phones are 18%, chargers 28%.
Keep the base price and GST separate on the invoice to reduce disputes.

How to use

Choose whether you want to add GST to a price or remove GST from an inclusive price.
Enter the amount.
Pick a GST rate (or choose Custom and type your own).
Click Calculate GST to see the GST amount and the total.

GST formulas

Add GST    = amount × rate ÷ 100        →  Total = amount + GST
Remove GST = amount ÷ (1 + rate ÷ 100)  →  GST   = amount − Net

GST rates by category

The most common GST slabs in India are 5%, 12%, 18% and 28%. Adding each to a base price of ₹1,000 shows how the tax, and the final total you pay, rise across categories.

Category example	GST rate	GST on ₹1,000	Total (incl. GST)
Packaged foods & essential goods	5%	₹50	₹1,050
Processed foods & some services	12%	₹120	₹1,120
Most services & electronics	18%	₹180	₹1,180
Luxury, sin goods & some autos	28%	₹280	₹1,280

Use this GST rate chart to match your goods or service to its slab, then use the calculator above to add or remove the tax from any amount.

GST Calculator FAQs

How do I add GST to a price?

Multiply the base price by the GST rate and divide by 100 to find the GST amount, then add it to the base price. For example, 18% on ₹1,000 gives ₹180 GST and a total of ₹1,180.

How do I remove GST from an inclusive price?

Divide the inclusive price by (1 + rate ÷ 100) to get the base price. The GST amount is the difference between the inclusive price and the base price.

What are the common GST rates in India?

Common slabs are 0.5%, 3%, 5%, 12%, 18% and 28%, plus a nil rate for exempt goods. This calculator also supports a custom rate.

What is the difference between CGST, SGST and IGST?

CGST and SGST are each half the rate, charged together on intra-state sales. IGST is the full rate charged on inter-state sales.

What is the GST rate on mobile phones?

GST on mobile phones is 18%, while chargers, batteries and power banks carry 28%.

Does this calculator split GST into CGST and SGST?

It gives the total GST. For an intra-state sale, split that amount equally into CGST and SGST (half the rate each).

Is GST included in the MRP?

Yes, the printed MRP in a store is usually tax-inclusive, so use Remove GST to find the taxable base price.

What is reverse GST and how do I find the base price?

Reverse GST is the same formula applied to a total: base = inclusive ÷ (1 + rate ÷ 100). The GST is the difference.

What GST rate applies to most services?

Most services fall in the 18% slab; small restaurants are often 5% without input tax credit.