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GST Calculator

Calculate GST amounts, prices including GST, and prices before GST using common GST rates in India.

Amount (₹) GST rate

Your result Enter an amount and GST rate above.

How the GST calculator works

GST, or Goods and Services Tax, is a tax applied to the supply of goods and services in India. This calculator can calculate GST both by adding GST to a price and by removing GST from a GST-inclusive price.

Adding GST

When you have a price before GST, the GST amount is calculated using the GST rate and then added to the original price.

GST Amount = Price × (GST Rate ÷ 100)

Total Price = Price + GST Amount

Removing GST

When the amount already includes GST, the pre-GST price can be calculated by dividing the total by one plus the GST rate.

Price Before GST = Inclusive Price ÷ (1 + GST Rate ÷ 100)

GST examples

18% GST on ₹1,000

GST = ₹1,000 × 18% = ₹180. The total price including GST is ₹1,180.

5% GST on ₹2,000

GST = ₹2,000 × 5% = ₹100. The total price including GST is ₹2,100.

Removing 18% GST from ₹1,180

The price before GST is ₹1,000 and the GST component is ₹180.

Common GST rates

The calculator includes several commonly used GST rates:

5% • 12% • 18% • 28%

The applicable GST rate depends on the specific goods or services and applicable tax rules. Always confirm the correct rate for your particular transaction.

Frequently asked questions

Multiply the price before GST by the GST percentage divided by 100. Add the resulting GST amount to the original price to get the GST-inclusive price.

Divide the GST-inclusive price by 1 plus the GST rate divided by 100. The difference between the inclusive price and the pre-GST price is the GST amount.

The calculator currently supports 5%, 12%, 18%, and 28% GST rates.

No. GST rates vary depending on the goods or services and the applicable tax classification.