GST Calculator - Calculate GST Online
Our GST calculator online tool instantly finds the GST amount, CGST, SGST and total payable value — add GST to a price or remove GST from an inclusive amount in one click.
GST Calculator - Calculate GST Online Instantly
Need to work out how much GST applies to a price, or figure out the base amount hidden inside a GST-inclusive figure? Our GST calculator online tool does both instantly, right inside your browser.
Whether you're a business owner pricing a product, a freelancer raising an invoice, or a shopper trying to understand a bill, this free GST calculator breaks the number down into CGST, SGST or IGST and shows the final total in seconds.
Think of it as a complete GST amount calculator: enter a value once, pick a rate, and get an accurate, ready-to-use tax breakdown — no spreadsheet or manual formula required.
Why Use a GST Calculator Online?
Manually working out GST percentages is easy to get wrong, especially when splitting tax into CGST and SGST. Our GST calculator online free tool is useful for:
- Pricing products & services: Instantly add GST to a base price to get the final selling price.
- Reading GST-inclusive bills: Remove GST from a total to see the original base amount and tax paid.
- Invoicing: Get an accurate CGST/SGST or IGST split for invoices and accounting records.
- Quick verification: Double-check a supplier's or vendor's GST calculation in seconds.
1. Add or Remove GST With One Tool
Switch between "Add GST" mode to calculate a GST-inclusive price from a base amount, or "Remove GST" mode to back-calculate the base amount from a GST-inclusive figure.
2. All Common GST Slabs Supported
Choose from the standard 5%, 12%, 18% and 28% GST slabs, or enter any custom GST rate for a precise calculation.
3. CGST, SGST and IGST Breakdown
Select Intra-State supply to split the GST equally into CGST and SGST, or Inter-State supply to see the full amount charged as IGST.
4. Fully Private, Browser-Based Calculation
Every calculation happens locally in your browser as soon as you use our GST calculator online tool. Nothing is sent to a server, so your figures stay private from start to finish.
How to Use the GST Calculator Online Tool (Step-by-Step Guide)
Choose Add or Remove GST
Select "Add GST" if you have a base price, or "Remove GST" if your amount already includes tax.
Enter the Amount
Type in the price you want to calculate GST for.
Select GST Rate & Supply Type
Pick a GST slab (or enter a custom rate) and choose Intra-State or Inter-State supply.
Click "Calculate GST"
Instantly see the GST amount, CGST/SGST or IGST split, and the final total.
GST Rate Slabs in India
| GST Slab | Typically Applies To | CGST + SGST Split |
|---|---|---|
| 5% | Essential goods & basic items | 2.5% + 2.5% |
| 12% | Standard processed goods | 6% + 6% |
| 18% | Most goods & services | 9% + 9% |
| 28% | Luxury & sin goods | 14% + 14% |
Conclusion: Calculate GST Online in Seconds
If you're looking for a fast, free, and accurate way to calculate GST, our GST calculator online tool adds or removes GST for any rate and instantly shows the CGST, SGST or IGST breakdown along with the final total. As a complete GST amount calculator, it needs no installation and keeps your figures private throughout.
Frequently Asked Questions (FAQ)
1. How can I calculate GST online for free?
Enter the amount, choose a GST rate, and select whether you want to add GST to the amount or remove GST from an amount that already includes it. The tool instantly shows the GST amount and final total.
2. What is the difference between CGST, SGST and IGST?
For sales within the same state, GST is split equally into CGST and SGST, each being half of the total GST rate. For sales between different states, the full GST rate is charged as IGST instead.
3. Can I remove GST from an amount that already includes tax?
Yes. Switch to the "Remove GST" mode, enter the GST-inclusive amount, and the tool will back-calculate the original base amount and the GST portion within it.
4. Is this GST calculator accurate for all GST slabs?
Yes. You can choose from the common GST slabs of 5%, 12%, 18% and 28%, or enter any custom GST rate for an accurate calculation.
5. Does this tool store or upload the amounts I enter?
No. All calculations happen locally in your browser. Your figures are never sent, stored, or processed on external servers.