GST Reverse Calculator

Recover the taxable value and GST amount from a tax-inclusive price. Enter your own values below to see total including GST and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Exclusive: GST = base × rate / 100. Inclusive: base = total ÷ (1 + rate / 100). Intra-state GST is split equally; inter-state tax is IGST.

Before you use the result

  • Choose the applicable notified GST rate and supply type. No compensation cess is included.

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What is GST Reverse Calculator?

GST Reverse Calculator helps you recover the taxable value and GST amount from a tax-inclusive price.

The main result is total including GST, with a breakdown of taxable amount, total GST and CGST (intra-state). The formula, example and assumptions below explain how to interpret it.

How to use GST Reverse Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather GST-inclusive amount (₹), GST rate (%) and entered amount. Use values from the same situation or reporting period.
  2. Replace the example GST-inclusive amount with your own value, then complete the other fields. Check the displayed units and each selected option.
  3. Select Calculate and read total including GST with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter GST-inclusive amount in ₹, at least 0. Decimals are accepted.
  • Enter GST rate in %, at least 0 and at most 100. Decimals are accepted.
  • Choose entered amount from Excludes GST and Includes GST.

GST Reverse Calculator: a worked example

With the inputs below, the result is ₹1,180 (total including GST). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
GST-inclusive amount (₹)₹1,180
GST rate (%)18 %
Entered amountIncludes GST
Total including GST₹1,180
Taxable amount₹1,000
Total GST₹180
CGST (intra-state)₹90
SGST / UTGST (intra-state)₹90

Understanding the GST Reverse result

Read total including GST alongside taxable amount, total GST and CGST (intra-state). These describe different parts of the same calculation.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

  • Example Taxable amount: ₹1,000
  • Example Total GST: ₹180
  • Example CGST (intra-state): ₹90
  • Example SGST / UTGST (intra-state): ₹90

GST Reverse Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Choose the applicable notified GST rate and supply type. No compensation cess is included.
  • Use the rate and eligibility rules that apply to your transaction. An example rate does not establish a tax liability or entitlement.

For wider guidance, visit Income Tax Department. The formula and scope of this specific tool are stated on this page.

GST Reverse Calculator FAQs

What does GST Reverse Calculator calculate?

GST Reverse Calculator helps you recover the taxable value and GST amount from a tax-inclusive price. Its main output is total including GST in ₹.

What inputs do I need for GST Reverse Calculator?

You need GST-inclusive amount (₹), GST rate (%) and entered amount. Use the field labels and units to match your figures to the formula.

Which formula does GST Reverse Calculator use?

Exclusive: GST = base × rate / 100. Inclusive: base = total ÷ (1 + rate / 100). Intra-state GST is split equally; inter-state tax is IGST.

What is a worked example for GST Reverse Calculator?

Example inputs: GST-inclusive amount: ₹1,180; GST rate: 18 %; Entered amount: Includes GST. The result is ₹1,180 (total including GST).

How should I enter GST-inclusive amount?

Enter GST-inclusive amount in ₹, at least 0. Decimals are accepted.

How do I choose entered amount?

Choose entered amount from Excludes GST and Includes GST. The example uses Includes GST; replace it if your circumstances differ.

How should I read total including GST?

Read total including GST alongside taxable amount, total GST and CGST (intra-state). These describe different parts of the same calculation.

Why might my GST Reverse Calculator result differ from my records?

Choose the applicable notified GST rate and supply type. No compensation cess is included. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in GST Reverse Calculator?

Yes. Note your first total including GST, change GST-inclusive amount or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is GST Reverse Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.