GST Calculator — Add or Remove GST
Calculate GST amount instantly. Free online GST calculator — add GST or remove GST from any amount. Supports all GST slabs: 5%, 12%, 18%, 28%.
How to Use
- Enter the amount — either the pre-GST price (exclusive) or price including GST (inclusive).
- Select the applicable GST rate (5%, 12%, 18%, or 28%).
- Choose "Add GST" for exclusive prices, or "Remove GST" for inclusive prices. Click Calculate.
Formula
Add GST: GST Amount = Base Amount × GST Rate / 100 | Total = Base + GST
Remove GST: GST Amount = Inclusive Price × Rate / (100 + Rate) | Base = Inclusive − GST
CGST = SGST = GST Amount / 2 (for intra-state) | IGST = GST Amount (for inter-state)
Example Calculation
Example: Add 18% GST to ₹10,000
| Component | Amount |
|---|---|
| Base Amount | ₹10,000 |
| GST @ 18% | ₹1,800 |
| CGST @ 9% | ₹900 |
| SGST @ 9% | ₹900 |
| Total (incl. GST) | ₹11,800 |
Frequently Asked Questions
GST in India has 4 main slabs: 5% (essential goods, economy services), 12% (standard goods), 18% (most goods/services), 28% (luxury goods, sin products). Gold is taxed at 3%.
CGST goes to Central Government, SGST to State Government (both split equally for intra-state). IGST is for inter-state transactions and goes entirely to the Centre before redistribution.
Businesses with annual turnover exceeding ₹40 lakh (₹20 lakh for services, ₹10 lakh for special category states) must register for GST.
Small businesses with turnover up to ₹1.5 crore can opt for composition scheme and pay a flat GST rate (1–6%) without ITC benefit and with fewer compliance requirements.
ITC allows registered businesses to claim credit for GST paid on purchases. This avoids double taxation. You can offset ITC against your GST liability.
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