๐งพGST Calculator
Add or remove GST at any rate, with a CGST/SGST vs IGST breakdown for India.
Runs entirely in your browser. No data is sent to a server.
Free GST Calculator
Need to add or remove GST from a price instantly? Our free GST calculator handles both directions at any rate. Enter a price and choose to add GST (for pricing a product) or remove GST (to find the base price from a GST-inclusive amount), pick from the common Indian GST slabs โ 5%, 12%, 18%, 28% โ or enter a custom rate.
For Indian businesses, toggle between intra-state (CGST + SGST split) and inter-state (IGST) to see exactly how the tax breaks down on your invoice. Every result shows the formula and substituted values, so you can double-check the math or explain it to a client.
No sign-up, no downloads, no limits โ just fast, accurate GST calculations whenever you need them. See the About page or the FAQ for more.
About the GST Calculator
Features
Add/remove GST
Both directions, including reverse GST from an inclusive price.
Common Indian slabs
0%, 5%, 12%, 18%, 28% as quick picks, plus custom rates.
CGST/SGST vs IGST
Toggle between intra-state and inter-state breakdown.
Step-by-step working
Formula shown with your actual values substituted.
Frequently Asked Questions
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.