PROAINEX

Free Online GST Calculator

Instantly calculate Goods and Services Tax (GST). Add or remove GST from any amount with detailed CGST, SGST, and IGST breakdowns.

₹

Calculation Breakdown

Net Amount (Base Price): ₹ 10,000.00
Total GST Amount: ₹ 1,800.00

You can manually adjust the tax split below. Total must remain ₹ 1,800.00.

₹
₹
Total (Incl. GST): ₹ 11,800.00

* Results are rounded to two decimal places.

Everything You Need to Know About GST Calculation

Our Free GST Calculator is designed to help business owners, freelancers, and consumers quickly calculate the Goods and Services Tax (GST) on any purchase or sale. Whether you need to figure out the tax portion of an inclusive price or add tax to an exclusive base price, this tool provides instant, accurate breakdowns.

Formula to Add GST

Use this when you have a base price and need to add tax to find the final selling price.

  • GST Amount = (Original Cost × GST %) / 100
  • Net Price = Original Cost + GST Amount

Formula to Remove GST

Use this when you have the final MRP and want to extract the base price and tax amount.

  • GST Amount = Total Cost - [Total Cost × {100 / (100 + GST %)}]
  • Net Price = Total Cost - GST Amount

Current GST Tax Slabs in India

The GST council of India has classified goods and services into several distinct tax slabs. Our calculator supports all of them:

Tax Slab Applicability (Examples)
0% (Exempt)Fresh milk, fresh produce, bread, salt.
5%Sugar, tea, coffee, edible oil, lifesaving drugs.
12%Computers, processed food, cellphones.
18%Software, financial services, hair oil, toothpaste. (Standard Rate)
28%Luxury items, automobiles, tobacco, aerated drinks.

What are CGST, SGST, and IGST?

When you calculate GST, the amount is split depending on where the sale occurs:

  • CGST (Central GST): Collected by the Central Government on an intra-state sale (within the same state).
  • SGST (State GST): Collected by the State Government on an intra-state sale. It is exactly half of the total GST rate (e.g., if GST is 18%, SGST is 9% and CGST is 9%).
  • IGST (Integrated GST): Collected by the Central Government for inter-state sales (between two different states). The full GST rate applies here as a single tax.

Frequently Asked Questions

If you are Adding GST: Calculate 18% of 10,000 (which is 1,800). The total becomes 11,800.

If you are Removing GST (meaning 10,000 already includes GST): The base price is calculated as 10,000 / 1.18 = 8,474.58. The GST amount is 1,525.42.
Yes! Our GST calculator is 100% free to use. There are no limits on the number of calculations you can perform, and you don't need to sign up or download any software.
While India has standard slabs (5%, 12%, 18%, 28%), some specialized goods might have different cess applied or varying international rates. Our custom percentage input allows you to calculate ANY percentage accurately based on the same standard formulas.