Calculators

GST Calculator – Calculate GST Inclusive & Exclusive Amount Online

Calculate Goods & Services Tax (GST/VAT) inclusive and exclusive amounts with customizable rates.

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Fast, secure & processed 100% locally in your browser

About This GST Calculator

This GST calculator helps you work out the Goods and Services Tax on any invoice amount in seconds. It supports both directions of calculation: adding GST to a base price to get the inclusive total, and removing GST from an inclusive price to recover the base amount. When the supply is intra-state, the tax is split equally into CGST and SGST; when the supply is inter-state, the full amount is treated as IGST. It is useful for shop owners quoting prices to customers, freelancers and consultants preparing invoices, small business accountants verifying GST returns, and anyone who simply wants to know how much tax is embedded in a bill.

All calculations are performed in your browser, and the tool includes the standard Indian GST slabs of 0%, 0.25%, 3%, 5%, 12%, 18% and 28% along with a custom option for any other rate. Results include the base amount, total GST, per-component split, and the final payable amount, all formatted in Indian Rupees with two decimal places.

How to Use the GST Calculator

Choose Add GST if you have a base price and want the tax-inclusive total, or Remove GST if you have an inclusive price and want to extract the base amount.
Enter the amount in the input field in Indian Rupees.
Select a GST rate from the standard slabs (0%, 0.25%, 3%, 5%, 12%, 18%, 28%), or choose Custom and enter any rate.
Select whether the supply is intra-state (CGST + SGST) or inter-state (IGST).
Read the breakdown in the result card — base amount, GST amount, per-component split, and final total.
Use Copy, Print or Export to save the calculation for your records.

Key Features

Two-direction calculation — add GST to a base price or remove GST from an inclusive price.
Standard Indian GST slabs — 0%, 0.25%, 3%, 5%, 12%, 18%, 28% plus a custom rate field.
CGST / SGST / IGST split — automatically handled based on whether the supply is intra-state or inter-state.
Live re-computation — the result updates instantly when you change the amount, rate or supply type.
Formatted in Indian Rupees with thousands separators and two decimal places.
GST rate reference table showing common goods and services for each slab.
Session history of your last 10 calculations for quick reference.
Copy, print and export actions to save the breakdown as text or PDF via the browser print dialog.

Frequently Asked Questions

What is the difference between GST-exclusive and GST-inclusive amounts?

A GST-exclusive amount is the price of the goods or service before tax is added; the customer pays this amount plus GST. A GST-inclusive amount is the final price paid by the customer and already contains the GST. Use "Add GST" to go from exclusive to inclusive, and "Remove GST" to go the other way.

How is CGST and SGST different from IGST?

For a sale within the same state, the GST is split equally into CGST (Central GST) and SGST (State GST). For a sale between two different states, a single IGST (Integrated GST) is charged at the full rate. This calculator applies the split automatically based on the supply type you select.

What formula does this calculator use?

To add GST, the tax is (rate ÷ 100) × base amount, and the total is base + tax. To remove GST from an inclusive amount, the base is (inclusive ÷ (1 + rate ÷ 100)) and the tax is inclusive − base. The tool displays the exact formula used for every calculation.

Can I use it for a rate that is not in the standard list?

Yes. Choose the "Custom" rate option and enter any percentage between 0 and 100. This is useful for specific HSN codes, cess-inclusive rates, or historical rates that you want to model.

Is my data sent anywhere?

No. All GST calculations run inside your browser. Amounts, rates and results never leave your device, and the history list is cleared the moment you close or refresh the page.