GST Calculator
Enter an amount and GST rate, then switch between inclusive and exclusive GST to see the tax amount, final total, and original amount update instantly.
GST details
Use the toggle to set whether the entered amount already includes GST.
Enter the base amount before GST is applied.
Live results update as soon as you type.
Choose the tax percentage that applies to the amount.
Quick rates
Final Price
The total amount is highlighted here so you can scan the final price immediately.
GST Amount
₹180.00
Tax added on top of the entered amount.
Original Amount
₹1,000.00
Base amount before GST is applied.
Instant breakdown
GST amount: ₹180.00 · Total amount: ₹1,180.00 · Original amount: ₹1,000.00
What is a GST Calculator?
A GST calculator is an online tool that helps you quickly add or remove Goods and Services Tax from an amount. It calculates the GST amount, the final price including tax, and the original amount excluding tax so you can price products and invoices accurately.
Why Use Our GST Calculator?
- ✓Switch between GST-inclusive and GST-exclusive pricing
- ✓See GST amount and final total instantly
- ✓Reverse-calculate the original amount from a tax-inclusive price
- ✓Useful for billing, invoicing, and price planning
- ✓No sign-up or installation required
- ✓Works fully in your browser on desktop and mobile
Features
How to Use the GST Calculator
- 1Enter the amount you want to work with
- 2Choose the GST rate that applies
- 3Select whether the amount already includes GST
- 4View the GST amount, total amount, and original amount instantly
- 5Use the reset button to start over with new values
Frequently Asked Questions
What is the difference between include GST and exclude GST?
Exclude GST means the amount entered is before tax. Include GST means the amount entered already contains tax, and the calculator backs out the original amount.
Can I use this as a reverse GST calculator?
Yes. When you switch to include GST mode, the calculator works as a reverse GST calculator and finds the original amount before tax.
Is the GST calculator accurate for invoices?
Yes. It uses standard percentage formulas to calculate GST and total price, which makes it suitable for quick invoice estimates and pricing checks.
Does the calculator work on mobile?
Yes, the layout is responsive and updates instantly on phones, tablets, and desktops.