GST Calculator
Calculate GST amount, base price, CGST and SGST with inclusive and exclusive modes. Supports all GST rates (5%, 12%, 18%, 28%). Free, no sign-up.
How to Use
1
Enter amount
Type the amount you want to calculate GST for.
2
Select GST rate
Choose from preset rates (5%, 12%, 18%, 28%) or enter a custom rate.
3
Choose mode
Toggle between GST exclusive (add GST) or inclusive (extract GST).
4
View breakdown
See base amount, GST amount, CGST, SGST, and total.
Features
Inclusive & Exclusive
Calculate GST both ways — add GST to a price or extract GST from an inclusive price.
Preset Rates
Quick buttons for standard GST rates: 5%, 12%, 18%, and 28%.
CGST/SGST Split
See the automatic 50-50 split into Central GST and State GST.
Copy Results
Copy GST calculation results to share or use in invoices.
Frequently Asked Questions
Calculator guides
Recommended Reading
Practical guides matched to this calculator, its inputs, and the result users need to trust.
4 guides