GST Calculator India | Add & Remove GST Online

Use our free GST Calculator to quickly add or remove GST from any amount. Our tool supports all major GST slabs and provides a clear breakdown of CGST, SGST, and IGST for your invoices.

Indian GST Calculator

Calculate GST for your goods and services

Calculation Type:

Transaction Type:

Calculation Results

Original Amount (Excl. GST):

₹ 0.00

Total GST Amount:

₹ 0.00

CGST (Central GST):

₹ 0.00

SGST (State GST):

₹ 0.00

IGST (Integrated GST):

₹ 0.00

Total Amount (Incl. GST):

₹ 0.00

*Disclaimer: This calculator provides an *estimate* for GST calculations based on common rates and formulas. Actual tax liabilities and rates may vary based on specific product/service classifications (HSN/SAC codes), government notifications, cess, and other legal provisions. Always consult with a qualified tax professional for precise calculations and compliance.

What is a GST Calculator?

GST Calculator is a digital tool that automates the calculation of the Goods and Services Tax in India. It is designed to simplify the process of finding the tax amount, the net amount (before tax), or the gross amount (including tax). By providing a clear breakdown of the tax components, it helps individuals and businesses ensure their financial records and invoices are accurate and compliant with the GST regulations.

Why Use This Tool?

  • Accuracy: Manually calculating GST can lead to errors. This tool performs calculations instantly and accurately, preventing costly mistakes.
  • Simplified Invoicing: Businesses can quickly determine the correct GST amount to add to their products or services, making invoice generation faster and more reliable.
  • Clarity for Consumers: As a consumer, you can use this tool to verify the GST charged on your purchases, ensuring you are not overcharged.
  • GST Breakdown: The calculator provides a crucial breakdown of the total GST into its components—CGST, SGST, or IGST—which is essential for understanding the tax structure of a transaction.

How Our GST Calculator Works:

➕ Adding GST (GST Exclusive to Inclusive)
The GST Amount is calculated by multiplying the Original Amount by the GST Rate and then dividing by 100. The Total Amount is then found by adding the Original Amount and the GST Amount.

➖ Removing GST (GST Inclusive to Exclusive)
To find the Original Amount, you take the Total Amount and divide it by the sum of 1 plus the result of dividing the GST Rate by 100. The GST Amount is then simply the Total Amount minus the Original Amount.

📊 Tax Breakdown Logic
For an Intra-State transaction, the GST Amount is split equally into CGST and SGST. For an Inter-State transaction, the entire GST Amount is shown as IGST.

Common Questions in Q&A Format

Q1: How do I use the GST Calculator to add GST?
A1: To add GST, select the “Add GST” option. Then, enter the original amount (before tax), choose the appropriate GST rate, and select the transaction type. The calculator will then provide you with the GST and total amounts.

Q2: How do I use the GST Calculator to remove GST?
A2: To remove GST, select the “Remove GST” option. Enter the total amount (including tax), choose the correct GST rate, and specify the transaction type. The tool will then display the original amount and the GST component.

Q3: What is the difference between CGST, SGST, and IGST?
A3: CGST (Central Goods and Services Tax) and SGST (State Goods and Services Tax) are levied on transactions that occur within the same state. IGST (Integrated Goods and Services Tax) is applied to transactions that take place between two different states or on imports.

Q4: Which GST rate should I choose?
A4: The GST rate depends on the specific goods or services being sold. Common tax slabs are 5%, 12%, 18%, and 28%. You should refer to the official HSN/SAC codes to determine the correct rate for your product or service.

Q5: What are HSN and SAC codes?
A5: HSN (Harmonized System of Nomenclature) codes are used to classify goods, while SAC (Services Accounting Code) codes are used for services. They are essential for determining the correct GST rate for any given product or service.

Q6: Is my financial data safe with this GST Calculator Online?
A6: Yes, your data is completely safe. The calculator operates entirely within your browser, and no information is stored or collected on our servers.

Q7: Can this tool calculate GST for UTs (Union Territories)?
A7: Yes, it can. For transactions within a Union Territory, the tax is split into CGST and UTGST (Union Territory Goods and Services Tax), which is handled similarly to SGST by our calculator.

Q8: What is the GST Amount and the Total Amount?
A8: The GST Amount is the tax component alone. The Total Amount is the final price, which is the sum of the original amount and the GST amount.

Q9: Does this tool account for GST on GST?
A9: No, the GST framework is designed to prevent a cascading “tax on tax” effect. The formulas used in this calculator are based on official rules that ensure this does not happen.

Q10: Is SmartxTool’s GST Calculator India free?
A10: Yes, the GST calculator is a completely free-to-use tool.

Frequently Asked Questions

ITC allows businesses to reduce their tax liability on sales by claiming a credit for the GST they have already paid on their purchases. It’s a key feature of GST that eliminates the cascading tax effect.

The 18% GST slab is the most common and applies to a wide range of goods and services, including many daily use items and most professional services.

The GST is split to ensure that both the Central and the State governments get their share of the tax revenue from transactions within a state.

An intra-state transaction involves a supplier and a buyer located in the same state or union territory. An inter-state transaction occurs when the supplier and buyer are in different states or when goods are imported.

The formula to remove GST is: Original Amount = Total Amount / (1 + (GST Rate / 100)). This is a common requirement for businesses filing returns.

GST is an indirect tax. It is collected from the customer by the business (the seller) and then paid to the government. The final tax burden is borne by the consumer.

It helps small businesses, which may not have dedicated accountants, to quickly generate accurate invoices, ensure correct tax collection, and better understand their tax obligations.

Tool Features

The SmartxTool GST Calculator is a fast and essential tool for businesses and consumers in India. Designed to simplify tax calculations, it allows you to instantly add GST to a net amount or remove GST from a gross amount. The calculator provides a detailed breakdown of the tax components (CGST, SGST, and IGST) based on the transaction type. With support for all common GST slabs, this tool is perfect for preparing invoices, checking bills, and managing your financial transactions with ease.