GST Calculator — Add or Remove GST Online Free (All Slabs)
Add or remove GST with intra/inter-state toggle, all slabs including 0%, GSTIN validation, and CGST, SGST, or IGST breakdown.
Also searched as: goods and services tax calculator · add gst calculator · remove gst calculator · reverse gst calculator · cgst sgst calculator
Enter an amount to see the GST breakdown
How to Use
Step-by-step guide to get the most from this tool
- 1
Choose mode
Select Add GST (exclusive base) or Remove GST (inclusive amount).
- 2
Set supply type
Pick intra-state (CGST+SGST) or inter-state (IGST).
- 3
Enter amount and rate
Type the amount and tap a GST slab — 0%, 5%, 12%, 18%, or 28%.
- 4
Review breakdown
See base, GST, total, and per-component tax. Optionally validate GSTIN.
Features
What makes this tool stand out
Add or remove GST
Works for exclusive and inclusive pricing.
Intra vs inter-state
CGST/SGST or IGST breakdown automatically.
0% slab
Calculate exempt supplies at zero rate.
GSTIN validator
Check 15-character GSTIN format.
Shareable link
Copy URL with your inputs.
Copy values
One-click copy for each tax component.
Related Tools
More free utilities you might find useful
Frequently Asked Questions
Quick answers to common questions
What is GST?+
GST (Goods and Services Tax) is a unified indirect tax on goods and services in India, replacing multiple central and state taxes.
What are the GST slabs in India?+
Main slabs are 0%, 5%, 12%, 18%, and 28%. Some items like basic food grains are exempt at 0%.
What is the difference between CGST, SGST, and IGST?+
CGST and SGST split the rate equally for intra-state sales. IGST is the full rate for inter-state transactions.
How do I calculate GST on an exclusive amount?+
GST Amount = Base × (Rate / 100). Total = Base + GST. Example: ₹1000 at 18% → GST ₹180, Total ₹1180.
How do I remove GST from an inclusive amount?+
Base = Inclusive / (1 + Rate/100). GST = Inclusive − Base.
What is a GSTIN?+
GSTIN is a 15-character tax identification number. This tool validates the format (not government records).
When do I use IGST vs CGST+SGST?+
Use IGST when supplier and buyer are in different states. Use CGST+SGST for same-state transactions.
Can I share my calculation?+
Yes. Click Share to copy a link with amount, rate, mode, and supply type pre-filled.