GST Calculator: A GST (Goods and Services Tax) Calculator helps businesses and consumers compute the tax amount on goods/services based on:
✅ Product/Service Value
✅ Applicable GST Rate (5%, 12%, 18%, 28%)
✅ Type of Calculation (Exclusive/Inclusive of GST)

GST is an indirect tax levied on the supply of goods and services in India, replacing multiple older taxes like VAT, service tax, and excise duty.


How to Calculate GST

1. GST Calculation Formula

GST Amount=Original Cost×(GST Rate100)Total Cost=Original Cost+GST Amount

2. Reverse GST Calculation (When Price Includes GST)

Original Cost=Total Cost1+(GST Rate100)


GST Calculation Examples

Example 1: Adding GST (Exclusive of Tax)

  • Product Price: ₹10,000

  • GST Rate: 18%

  • GST Amount: ₹10,000 × 0.18 = ₹1,800

  • Total Price: ₹10,000 + ₹1,800 = ₹11,800

Example 2: Extracting GST (Inclusive of Tax)

  • Total Price: ₹23,600 (including GST)

  • GST Rate: 18%

  • Original Cost: ₹23,600 ÷ 1.18 = ₹20,000

  • GST Amount: ₹23,600 – ₹20,000 = ₹3,600


Current GST Rates in India (2024)

Category GST Rate Common Items
Essential Goods 0% Fresh milk, eggs, grains
Common Goods 5% Tea, coffee, edible oil
Standard Goods 12% Processed foods, smartphones
General Goods 18% Soap, AC, furniture
Luxury/Sin Goods 28% Cars, cigarettes, luxury watches

Benefits of Using a GST Calculator

✅ Instant Tax Calculation – No manual errors
✅ Business Compliance – Ensures accurate invoicing
✅ Cost Transparency – Helps consumers compare prices
✅ Supports All GST Types (CGST, SGST, IGST)
✅ Free & Mobile-Friendly


GST vs Old Tax System

Feature GST System Pre-GST System
Tax Structure Single unified tax Multiple taxes (VAT, excise, etc.)
Input Credit Seamless across states Limited to state-level
Online Filing Mandatory via GST portal Varied by state

FAQs on GST Calculation

1. How is GST calculated on discounted prices?

  • GST applies to the final discounted price, not MRP.

2. What is the difference between CGST, SGST, and IGST?

  • CGST + SGST: For intra-state sales (e.g., 9% + 9% = 18%)

  • IGST: For inter-state sales (single 18% rate)

3. Can I claim GST input credit?

  • Yes, if you’re a registered business with valid invoices.

4. Is GST applicable on exports?

  • 0% GST (but exporters can claim input tax refunds).

5. How to calculate GST for restaurants?

  • 5% without ITC (Input Tax Credit) for AC restaurants.


Try Our Free GST Calculator

Simplify tax compliance with our GST Calculator:
📌 Calculate GST-exclusive/inclusive prices
📌 Generate compliant invoices
📌 Supports all GST rates (0% to 28%)

Calculate GST Now & Stay Compliant!


Key Takeaways

  • GST = Original Price × (GST Rate ÷ 100)

  • India has 4 primary GST slabs (5%, 12%, 18%, 28%)

  • Use reverse calculation when price includes GST