GST calculator

Add GST to a price, or find the GST included in a price, at a rate you enter.

50free calculators
No sign-up. No saved inputs.

Find a calculator

Calculated from your inputs

Amount with tax added: ₹11,800
Tax added: ₹1,800
Base if amount includes tax: ₹8,474.58
Tax included in amount: ₹1,525.42

How this is calculated

The entered percentage is your assumption. This tool does not determine applicable GST rates, classification or tax eligibility.

Defaults are editable examples, not current provider quotes. Results are rounded for display. These are scenarios from your inputs, not live market data or investment advice.

About the GST calculator

Goods and Services Tax (GST) is added to the price of most goods and services in India. This calculator works in both directions: adding tax to a base price, and splitting a tax-inclusive price into base and tax.

How the GST calculator works

GST added = Amount × rate ÷ 100; GST included = Amount − Amount ÷ (1 + rate ÷ 100)

Enter the amount and the GST rate. The calculator shows the price with GST added and, separately, the base and tax if the amount already includes GST.

Worked example

Amount: ₹10,000
Tax rate: 18%

Amount with tax added: ₹11,800
Tax added: ₹1,800
Base if amount includes tax: ₹8,474.58
Tax included in amount: ₹1,525.42

Why use a GST calculator?

Check the tax on an invoice.
Find the pre-tax price from a GST-inclusive price.

GST calculator FAQs

What are CGST, SGST and IGST?

On a sale within a state, GST is split equally between central GST and state GST. On a sale between states, integrated GST is charged instead.

Which GST rate applies to my product?

The rate depends on the classification of the goods or service and is notified by the government. The calculator uses the rate you enter.

Why is GST included not simply rate × amount?

Because the amount already contains the tax. The tax is a share of the base price, not of the total.

Does the calculator handle cess?

No. A few goods carry a cess on top of GST; add it separately at the rate that applies.

Field
Price band
Shares per lot
One lot at cut-off
NSE total
QIB
NII
Retail
Issue size
Opens
Closes
Lists
Registrar