GST Calculator

Add GST to a base price or remove GST from a total amount. Instant CGST and SGST breakdown for all Indian GST slabs. Runs entirely in your browser.

Calculation Mode

Enter the base price (excl. GST). GST will be added on top.

₹

GST Rate

GST Breakdown

Enter an amount

Results will appear here instantly.

About this tool

A fast, accurate GST calculator built for Indian businesses and consumers. Use Add GST to compute the final price after tax, or Remove GST to find the pre-tax base price hidden inside a GST-inclusive amount. Results update as you type — no submit button needed.

All standard Indian GST slabs are available as one-click presets — 3%, 5%, 12%, 18%, and 28% — plus a Custom option for any rate. The breakdown always shows the total GST amount split into equal CGST and SGST halves for intra-state compliance.

How to use

1

Choose your mode

Select Add GST to calculate the final price after tax, or Remove GST to extract the base price from a GST-inclusive amount.

2

Enter the price

Type the base amount (Add GST mode) or the total amount including tax (Remove GST mode). The result updates instantly.

3

Select the GST rate

Pick a standard Indian GST slab — 3%, 5%, 12%, 18%, or 28% — or enter a custom rate using the Custom option.

4

Read the results

See the GST amount, CGST and SGST halves for intra-state compliance, and the final or base price — all updated as you type.

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Frequently asked questions

Common questions about GST calculation and Indian tax slabs.

Add GST mode takes a base price (excluding GST) and calculates the final price after adding the chosen GST rate. Remove GST mode takes a total price (including GST) and works backward to extract the base price and the GST component embedded in it.

For intra-state transactions, GST is split equally into CGST (Central GST) collected by the central government and SGST (State GST) collected by the state government. Each is half of the total GST rate. For example, at 18% GST, CGST is 9% and SGST is 9%.

IGST (Integrated GST) applies to inter-state transactions and equals the full GST rate. The total GST amount shown in this calculator equals the IGST amount. Simply ignore the CGST/SGST split if you need IGST instead.

India's GST council has defined slabs at 0%, 3%, 5%, 12%, 18%, and 28%. Common items like food grains are at 0%, gold at 3%, essential goods at 5%, standard goods at 12–18%, and luxury or sin goods at 28%. Use the Custom option to enter any rate.

No. All calculations happen entirely in your browser using JavaScript. No data is transmitted to any server.