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GST Calculator India 2026: Calculate GST in Seconds (Free Tool)

Published: 2026-04-25 Read Time: 6 min read
GST Calculator India 2026: Calculate GST in Seconds (Free Tool)

Understanding GST in India

GST (Goods and Services Tax) is a comprehensive indirect tax on manufacture, sale, and consumption of goods and services throughout India.

India has multiple GST slabs: 0%, 5%, 12%, 18%, and 28%. Most goods and services fall under the 18% slab.

GST can be calculated inclusively (tax included in price) or exclusively (tax added to base price).

GST Calculation Formula

For exclusive GST: GST Amount = (Original Cost × GST Rate) / 100. Final Price = Original Cost + GST Amount.

For inclusive GST: GST Amount = (Original Cost × GST Rate) / (100 + GST Rate). Base Price = Original Cost - GST Amount.

Using an online GST calculator eliminates manual errors and saves time for businesses and individuals.

How to Use GST Calculator

Enter the original amount and select the GST rate (5%, 12%, 18%, or 28%).

Choose whether the amount is exclusive or inclusive of GST.

The calculator will instantly show the GST amount and final price.

FAQs

Q: What are the current GST rates in India?

India has GST rates of 0%, 5%, 12%, 18%, and 28%. Most goods and services are taxed at 18%.

Q: How do I know if GST is inclusive or exclusive?

Exclusive means tax is added to the price. Inclusive means tax is already included in the displayed price.

Q: Can I calculate reverse GST?

Yes. Use the inclusive GST calculation to find the base price and tax amount from a final price.