Is this GST calculator free?

Yes, it is completely free and requires no signup.

Free Online GST Calculator – Add or Remove GST Instantly (CGST, SGST & IGST)

100% FREE – No Signup Required

Enter Amount (₹)

Select GST Rate

Enter Custom GST %

Calculation Type
Add GST Remove GST (Reverse)

Tax Mode

Original Amount:

Total GST:

CGST:

SGST:

Final Amount:

Calculation History

GST Invoice

Date:

Original:

GST:

Total:

Latest GST Tax Slabs in India

GST Rate	Category
5%	Essential items & transport
12%	Processed foods & services
18%	Standard goods & services
28%	Luxury goods & automobiles

GST Calculator FAQs

How to calculate GST?
GST = Amount × Rate ÷ 100.

How to remove GST?
Original = Total ÷ (1 + Rate/100).

Is this calculator free?
Yes, completely free and works instantly.

Free GST Calculator Online – Calculate CGST, SGST & IGST Instantly (100% Free)

Use our free GST calculator online to quickly calculate GST inclusive and exclusive amounts, split CGST, SGST, and IGST, and determine accurate tax values within seconds. This online GST calculator India is completely 100% free, requires no login, no signup, and works instantly on mobile and desktop.

Whether you're a business owner, accountant, freelancer, shopkeeper, eCommerce seller, or student preparing for commerce exams, this tool helps you calculate GST tax accurately for 5%, 12%, 18%, and 28% slabs. You can also perform reverse GST calculation to extract tax from total bill amount.

Looking for other financial tools? Try our Loan EMI Calculator, Percentage Calculator, Income Tax Calculator, and SIP Investment Calculator for complete financial planning — all completely free.

📊 What Can You Calculate with This GST Calculator?

Add GST to Amount – Calculate final price including GST
Remove GST (Reverse Calculation) – Extract GST from total bill
Split CGST & SGST – For intra-state transactions
Calculate IGST – For inter-state transactions
Custom GST Rates – Enter your own GST percentage
Instant Results – No waiting, no loading delays

💼 Why Use Our Free GST Calculator?

100% Free GST Calculator – No subscription, no hidden charges
No Registration Required – Use instantly
Mobile-Friendly & Fast – Works on Android, iPhone & desktop
Accurate Tax Calculation – Ideal for billing & invoices
Secure & Private – No data stored
Made for Indian GST System – Supports all GST slabs

🧾 How to Calculate GST Online?

To calculate GST manually:

GST Amount = (Original Price × GST%) ÷ 100
Final Price = Original Price + GST Amount

For reverse GST calculation:

Original Price = Total Amount ÷ (1 + GST% ÷ 100)

Instead of doing manual calculations, simply enter the amount and GST rate above — our calculator does everything instantly and accurately.

You may also explore our related tools: Invoice Generator, Currency Converter, Unit Converter, and Age Calculator — all completely free online tools.

Frequently Asked Questions – GST Calculator

Yes. Our online GST calculator is completely free. There is no subscription, no signup, and no hidden charges.

Yes. Our GST calculator automatically splits GST into CGST and SGST for intra-state sales and calculates IGST for inter-state transactions.

Use the reverse GST calculation option. Enter the total amount and GST rate, and the tool will extract the original price before GST instantly.

The calculator supports all standard Indian GST slabs including 5%, 12%, 18%, and 28%. You can also enter a custom GST percentage.

No. We do not store any billing amounts or GST values. All calculations happen instantly in your browser for maximum privacy.

Yes. This GST calculator is ideal for small businesses, retailers, freelancers, and eCommerce sellers for quick invoice calculations.