Online GST Calculator

The easiest way to calculate Goods and Services Tax for any amount.

Whether you're a business owner creating an invoice, a consumer checking a bill, or a student learning about taxation, our free online GST calculator is the perfect tool for you. It provides instant and accurate GST calculations for any amount, helping you understand the tax component of a price with ease. You can both add GST to a base amount and remove GST from a total price.

How to Use the GST Calculator

Our tool is designed for simplicity and flexibility. Here’s how to use it:

1. Select the Calculation Type:
   • Choose "Add GST" if you have the pre-tax amount and want to find the final price.
   • Choose "Remove GST" if you have the final price (including tax) and want to find the original amount.
2. Enter the Amount: Input the value in the amount field.
3. Set the GST Rate: Enter the GST rate percentage. You can also use the handy buttons for common GST slabs in India (5%, 12%, 18%, and 28%).

The calculator will instantly update, showing you a detailed breakdown of the Base Amount, CGST, SGST, Total GST, and the Final Amount.

Understanding GST Calculations

What is GST Inclusive vs. GST Exclusive?

Understanding these two terms is key to correct calculations:

• GST Exclusive (Add GST): This is the base price of a product or service *before* tax is applied. Our calculator's "Add GST" mode is used for this.
• GST Inclusive (Remove GST): This is the final price you pay, which already *includes* the GST amount. Our calculator's "Remove GST" mode helps you reverse-calculate the original price and tax from this total.

GST Calculation Formulas

Our tool uses the standard formulas for GST calculation in India:

To Add GST:

GST Amount = (Original Cost * GST %) / 100

Final Price = Original Cost + GST Amount

To Remove GST:

GST Amount = Original Cost - (Original Cost * (100 / (100 + GST %)))

Base Price = Original Cost - GST Amount

Frequently Asked Questions (FAQ)

What are CGST and SGST?

For intra-state transactions (within the same state), the total GST is split into two equal parts: CGST (Central Goods and Services Tax), which goes to the central government, and SGST (State Goods and Services Tax), which goes to the state government. Our calculator automatically shows you this breakdown.

Is this calculator up-to-date with Indian GST rates?

Yes, our tool includes presets for the most common GST slabs currently active in India (5%, 12%, 18%, 28%). You can also enter any custom rate for specific items or services.

Is my financial data safe?

Absolutely. This GST calculator operates entirely within your web browser. No data you enter is ever sent to or stored on our servers. Your calculations are 100% private and secure.