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GST Calculator

Add GST to an amount and see the total.

Last updated: 9 Aug 2026

Quick answer

To add GST, multiply the amount by the GST rate and add it back: total = amount × (1 + rate ÷ 100). For example, ₹1,000 at 18% GST becomes ₹1,180 (₹180 GST). Enter the amount and rate above.

₹

Add GST to any amount: total = amount × (1 + rate ÷ 100). Pick the applicable rate (5%, 12%, 18% or 28%) and enter the base amount.

How to calculate GST

  1. 1 Enter the base amount (before GST).
  2. 2 Choose the GST rate.
  3. 3 We show the total including GST.

Frequently asked questions

How do I add GST to a price?
Multiply the amount by (1 + rate/100). For ₹1,000 at 18%: 1000 × 1.18 = ₹1,180.
How do I find the GST amount?
GST amount = amount × rate ÷ 100. For ₹1,000 at 18%, GST is ₹180.
What are the GST slabs in India?
The main GST rates are 5%, 12%, 18% and 28%, depending on the goods or services.

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