GST Calculator

GST in India: Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services across India. This calculator helps you calculate the amount of GST for a given value and rate, or to extract the original amount from a GST-inclusive price.

Calculate GST
Calculation Type
GST Rate
Amount Details
₹
GST Information
GST Rates In India

GST is divided into 5 major rate slabs:

  • 0% - Essential goods like fresh fruits, vegetables
  • 5% - Essential items like food, medicine
  • 12% - Standard rate for goods like processed food
  • 18% - Standard rate for most goods and services
  • 28% - Luxury items and sin goods
Quick Tip

For B2B transactions, GST can be claimed as input credit if you have proper documentation like tax invoices with GSTIN.

GST Calculation Results
Original Amount ₹0.00
GST Rate 5%
GST Amount ₹0.00
Final Amount (with GST) ₹0.00

GST Guide & Tutorial

Understanding GST

Goods and Services Tax (GST) is a comprehensive indirect tax levied on the manufacture, sale, and consumption of goods and services throughout India. It replaced multiple cascading taxes levied by central and state governments.

Key Features
  • One nation, one tax system
  • Eliminates cascading effect
  • Input tax credit mechanism
  • Technology-driven implementation
Components
  • CGST: Central GST
  • SGST: State GST
  • IGST: Integrated GST
  • UTGST: Union Territory GST
GST Rate Structure
Rate Category Examples
0% Essential Items Fresh fruits, vegetables, milk, bread
5% Basic Necessities Packaged food items, textiles, medicines
12% Standard Rate 1 Frozen meat products, butter, ghee
18% Standard Rate 2 Most manufactured items, services
28% Luxury Items Cars, motorcycles, tobacco products
GST Calculation Methods
Forward Calculation (Add GST)

When original amount is known:

  • GST Amount = Original Amount × (GST Rate ÷ 100)
  • Final Amount = Original Amount + GST Amount
  • Example: ₹1000 at 18% GST
  • GST = ₹1000 × (18 ÷ 100) = ₹180
  • Final = ₹1000 + ₹180 = ₹1180
Reverse Calculation (Remove GST)

When final amount is known:

  • Original Amount = Final Amount × [100 ÷ (100 + GST Rate)]
  • GST Amount = Final Amount - Original Amount
  • Example: ₹1180 including 18% GST
  • Original = ₹1180 × [100 ÷ (100 + 18)] = ₹1000
  • GST = ₹1180 - ₹1000 = ₹180
How to Use the GST Calculator
1
Select Calculation Type

Choose whether you want to add GST to an amount or extract the original amount from a GST-inclusive price.

2
Choose GST Rate

Select the applicable GST rate (0%, 5%, 12%, 18%, 28%) or enter a custom rate if needed.

3
Enter Amount

Input the original amount (for forward calculation) or final amount (for reverse calculation).

4
Review Results

Check the breakdown of original amount, GST amount, and final amount in the results section.

Frequently Asked Questions

GST differs from the previous system in several ways:

  • Single tax replaces multiple taxes (VAT, Service Tax, etc.)
  • Eliminates tax-on-tax (cascading effect)
  • Unified tax rates across states
  • Seamless input tax credit chain
  • Technology-driven compliance

This makes the system more efficient and transparent.

Input Tax Credit is a key feature of GST:

  • Allows businesses to claim credit for taxes paid on inputs
  • Applies to both goods and services
  • Requirements for claiming ITC:
    • Valid tax invoice
    • Receipt of goods/services
    • Tax actually paid to government
    • Filing of returns

ITC helps avoid cascading of taxes throughout the supply chain.

The type of GST applicable depends on the nature of transaction:

Transaction Type Applicable GST
Within State CGST + SGST
Interstate IGST
Import IGST

IGST rate equals the sum of CGST and SGST rates.

To determine the correct GST rate:

  1. Check HSN/SAC code of the product/service
  2. Refer to GST rate finder tool on government portal
  3. Consult GST rate schedules
  4. Consider specific exemptions/notifications

Key factors affecting GST rate:

  • Nature of product/service
  • End use
  • Special category status
  • Any applicable exemptions

Common mistakes to avoid in GST calculations:

  • Wrong Rate Selection:
    • Using outdated rates
    • Misclassifying products
  • Calculation Errors:
    • Incorrect base amount
    • Double taxation
    • Wrong formula usage
  • Documentation Issues:
    • Incomplete invoices
    • Missing GST breakup

Always double-check calculations and maintain proper documentation.

Coming Soon: Enhanced GST Calculator

We're working on enhancing this calculator with the following features:

  • Bill-based GST calculation with multiple items
  • GST breakup (CGST, SGST, IGST) based on transaction type
  • GST invoice generator with input credit calculation
  • HSN code lookup for appropriate GST rates