GST Calculator
Easily calculate Goods and Services Tax (GST) for inclusive and exclusive amounts.
Enter details to calculate GST
Calculations are performed locally in your browser.
About GST Calculator
The GST Calculator is a quick and reliable tool for businesses, accountants, freelancers, and consumers who need to calculate Goods and Services Tax in India. Whether you need to add GST to a base price to get the final selling price, or reverse-calculate to extract the GST component from an already-inclusive total, this tool handles both scenarios in a single click. It supports all standard GST slabs including 5%, 12%, 18%, and 28%, and also provides a breakdown into CGST and SGST components for interstate transactions. Everything is processed locally in your browser for instant results.
How to Use GST Calculator
- 1Enter the base amount (exclusive of GST) or the total amount (inclusive of GST).
- 2Select the applicable GST tax slab from the options (5%, 12%, 18%, or 28%).
- 3Choose whether you want to Add GST to the base price or Remove/Extract GST from the inclusive total.
- 4View the calculated GST amount, base price, and the final total including a breakdown of CGST and SGST.
Key Features
- ✓Add or remove GST instantly
- ✓Supports all standard GST slabs
- ✓Browser-based processing
- ✓Clear breakdown of CGST/SGST
🔒 Privacy First — Your Data Never Leaves Your Device
Your privacy is our highest priority. The GST Calculator tool processes all your files and data entirely within your web browser using modern JavaScript and WebAssembly technology. No files, images, documents, or personal information are ever uploaded to our servers or transmitted over the internet. This means your sensitive data stays completely private, secure, and under your control at all times — even if you are offline after the page has loaded.
Frequently Asked Questions
How do you calculate GST?
There are two common scenarios. To add GST to a base price: Final Price = Base Amount × (1 + GST Rate / 100). For example, if the base price is ₹1,000 and GST is 18%, the final price is ₹1,180. To remove GST from an inclusive price: Base Amount = Inclusive Price / (1 + GST Rate / 100). So if a product is priced at ₹1,180 inclusive of 18% GST, the original base price is ₹1,000 and the GST component is ₹180. Our tool performs both calculations automatically.
Can I use this for any tax slab?
Yes, you can input custom tax slabs or use the predefined standard rates of 5%, 12%, 18%, and 28% as defined under the Indian GST framework. The calculator accurately handles all standard rates and provides correct CGST and SGST breakdowns, which are typically 50% of the total GST rate each for intra-state supplies.
What is the difference between CGST and SGST?
CGST (Central Goods and Services Tax) is the portion of GST collected by the Central Government, while SGST (State Goods and Services Tax) is collected by the State Government for intra-state transactions. For an 18% GST transaction, 9% goes as CGST and 9% as SGST. For inter-state transactions, IGST (Integrated GST) applies at the full rate.
Why Use AllAdvanceTools?
⚡ Instant & Free
All tools are completely free to use with no subscriptions, no sign-ups, and no usage limits. Process your files in seconds directly in your browser.
🛡️ 100% Private
We never upload your files to any server. Every conversion, calculation, or transformation happens locally on your device, guaranteeing total privacy.
🌐 Works Everywhere
Our tools work on any modern browser across Windows, Mac, iOS, and Android — no installation, no plugins, and no dependencies required.