Frequently Asked Questions
Everything you need to know about the GST Calculator.
How does the GST calculator work?
Enter a price and rate, choose to add or remove GST, and get the GST amount and resulting price instantly.
Is it free?
Completely free, no sign-up or limits.
What GST rates are supported?
Common Indian slabs (0%, 5%, 12%, 18%, 28%) as quick picks, plus any custom rate.
What's the difference between adding and removing GST?
Adding GST calculates the inclusive price from a base price; removing GST (reverse GST) finds the base price from a GST-inclusive amount.
What is CGST and SGST?
For intra-state transactions in India, GST is split equally into Central GST and State GST; the calculator shows this split when selected.
What is IGST?
Integrated GST, applied to inter-state transactions in India instead of the CGST/SGST split; select this mode for inter-state sales.
Can I use it for other countries' GST/VAT?
Yes, the custom rate field works for any percentage-based GST or VAT calculation, though the CGST/SGST split is India-specific.
Does it show the calculation formula?
Yes, the formula and substituted values are shown for whichever mode you're using.
Is my data stored?
No; everything runs in your browser and isn't stored or sent.
Does it work on mobile?
Yes, fully responsive.