Free GST Calculator Online
Calculate GST (Goods and Services Tax) amounts with our free online GST Calculator. Add or remove GST at standard rates (3%, 5%, 12%, 18%, 28%) or enter a custom rate. See the base price, GST amount, and total price with CGST/SGST and IGST breakdowns for Indian GST compliance. Toggle between adding GST to a base price or extracting GST from an inclusive price. Perfect for businesses, accountants, shopkeepers, freelancers, and anyone who needs quick GST calculations. All processing happens in your browser with no data stored.
How to Use GST Calculator
Enter Amount
Type the price amount — either the base price or the GST-inclusive price.
Select GST Rate
Choose from preset rates (3%, 5%, 12%, 18%, 28%) or enter a custom rate.
View Results
See the base price, GST amount, CGST/SGST split, IGST, and total amount.
Features
Add or Remove GST
Calculate GST to add on a base price, or extract GST from an inclusive price.
Indian GST Rates
Preset buttons for standard Indian GST rates: 3%, 5%, 12%, 18%, and 28%.
CGST/SGST/IGST Split
See the Central GST, State GST, and Integrated GST breakdowns.
Custom Rates
Enter any custom GST rate for countries or situations with non-standard rates.
Benefits of Using GST Calculator
Completely Free
Use GST Calculator without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
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These free tools work seamlessly with GST Calculator to handle every step of your workflow.