GST Calculator

About GST Calculator

Our GST calculator helps you quickly calculate Goods and Services Tax (GST) for any transaction. Whether you need to add GST to a base price (exclusive) or extract GST from a total price (inclusive), this tool makes it simple.

How to Use the GST Calculator

Select Mode: Choose GST Exclusive (to add GST) or GST Inclusive (to extract GST)
Enter Amount: Input the base amount or total amount depending on your mode
Select GST Rate: Choose from standard rates (5%, 12%, 18%, 28%) or enter custom rate
Choose GST Type: Select Intra-State (CGST+SGST) or Inter-State (IGST)
Calculate: Click the calculate button to get instant results

GST Calculation Formulas

GST Exclusive (Adding GST):

GST Amount = (Original Amount × GST Rate) / 100
Total Amount = Original Amount + GST Amount

GST Inclusive (Extracting GST):

GST Amount = (Total Amount × GST Rate) / (100 + GST Rate)
Original Amount = Total Amount - GST Amount

Understanding CGST, SGST, and IGST

For intra-state transactions (within same state), GST is split equally between Central GST (CGST) and State GST (SGST). For inter-state transactions (across states), Integrated GST (IGST) applies.

Example: 18% GST intra-state = 9% CGST + 9% SGST. 18% GST inter-state = 18% IGST.

Common GST Rates by Category

5% GST: Essential goods, transport services, small restaurants
12% GST: Processed food, computers, business class air travel
18% GST: Most services, capital goods, industrial intermediaries
28% GST: Luxury items, automobiles, tobacco products

Frequently Asked Questions

What is the difference between GST inclusive and exclusive?

GST inclusive means the GST is already included in the price you see. GST exclusive means GST needs to be added on top of the displayed price. For example, ₹1000 inclusive at 18% GST means base price is ₹847.46 and GST is ₹152.54. But ₹1000 exclusive at 18% GST means final price is ₹1180 (₹1000 + ₹180 GST).

How do I calculate GST from total amount?

To calculate GST from total amount (inclusive): GST Amount = (Total × GST Rate) / (100 + GST Rate). For example, if total is ₹1180 with 18% GST: GST = (1180 × 18) / 118 = ₹180.

What are the current GST rates in India?

The current GST rates in India are 0% (exempt), 0.25%, 3%, 5%, 12%, 18%, and 28%. Most commonly used rates are 5%, 12%, 18%, and 28% depending on goods and services.

Is this GST calculator accurate?

Yes, this calculator uses standard GST formulas. However, always verify calculations for official filing. For complex scenarios or professional advice, consult a GST expert.

Calculation Results