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Tax Calculators

GST Calculator

Add or remove GST and split base vs. tax for any amount.

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
₹
Verified formula Private

GST amount

₹180.00

Base amount
₹1,000.00
Total amount
₹1,180.00
View chart data
Base amount1000
GST amount180

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the GST Calculator

The GST Calculator works out your gst amount, along with 2 related figures in an instant. Enter amount, gst rate and calculation type and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the amount.
  2. Choose the gst rate.
  3. Enter the calculation type.
  4. Read off your gst amount, together with base amount and total amount — the calculator updates automatically, with no button to press.

Worked example

For example, with amount of ₹1,000, gst rate of 18% and calculation type of 0, the gst amount is ₹180.00.

Inputs used
Amount ₹1,000
GST rate 18%
Calculation type 0
Results
Base amount ₹1,000.00
GST amount ₹180.00
Total amount ₹1,180.00

Results are estimates for educational use, not professional advice.

Key terms explained

GST
Goods and Services Tax — an indirect tax added to the price of goods and services.

Frequently asked questions

GST is the amount multiplied by the GST rate divided by 100. For example, 18% GST on ₹1,000 is ₹180, making the total ₹1,180.

India's GST has slabs of 0%, 5%, 12%, 18% and 28%, depending on the goods or services. Enter the rate that applies to your item.

Divide the GST-inclusive amount by (1 + rate ÷ 100). At 18% GST, a ₹1,180 total contains ₹1,000 before GST and ₹180 of GST.

For sales within a state, GST is split equally into CGST and SGST. For sales between states, a single IGST applies. The total rate is the same either way.

Enter the amount. Choose the gst rate. Enter the calculation type. Read off your gst amount, together with base amount and total amount — the calculator updates automatically, with no button to press.

GST in India Explained: Rates, Calculation and Examples

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