Calculate GST Instantly
Add or remove GST from any amount and see the CGST, SGST or IGST split immediately. Every calculation runs in your browser — nothing is uploaded anywhere.
- Works offline once loaded
- Accurate to the paisa
- Mobile friendly
Add or Remove GST
Quick GST Rate Calculators
Jump straight to a dedicated calculator for the most common GST slabs in India.
GST Calculation Examples
A quick reference for how GST changes the final price at each common rate, on a base amount of ₹1,000.
| Amount | GST Rate | GST | Total |
|---|---|---|---|
| ₹1,000 | 5% | ₹50 | ₹1,050 |
| ₹1,000 | 12% | ₹120 | ₹1,120 |
| ₹1,000 | 18% | ₹180 | ₹1,180 |
| ₹1,000 | 28% | ₹280 | ₹1,280 |
| ₹10,000 | 18% | ₹1,800 | ₹11,800 |
| ₹50,000 | 18% | ₹9,000 | ₹59,000 |
Popular GST Calculators
Dedicated calculators for every common GST scenario, each with worked examples.
Add GST to a base price
Extract the base price from a GST-inclusive amount
Find the base price and tax split from a final price
Work out the Central GST component
Work out the State GST component
Calculate Integrated GST for inter-state supply
How GST Calculation Works
Adding GST
GST Amount = Amount × Rate ÷ 100. Add this to the original amount to get the final, GST-inclusive price.
Removing GST
Original Amount = Total × 100 ÷ (100 + Rate). Subtract this from the total to find the GST portion.
Splitting GST
For sales within the same state, GST splits equally into CGST and SGST. For sales between states, the full amount is charged as IGST.
GST Rates in India
India uses four primary GST slabs. Rates vary by product or service category.
| Slab | Typical use |
|---|---|
| 0% | Essential and exempt items |
| 5% | Basic household necessities |
| 12% | Standard processed goods |
| 18% | Most goods and services |
| 28% | Luxury and sin goods |
Note: GST rates may change based on government notifications. Verify the applicable rate for your product or service from official sources before making tax decisions. See our full GST Rates guide.
Why Use GST Calculator India
Instant results
Every field updates the result in real time — no submit button, no waiting.
Private by design
Calculations run entirely in your browser. Nothing you type is sent to a server.
Built for India
Rupee formatting, Indian digit grouping and CGST/SGST/IGST splits, exactly as used in Indian invoices.
Frequently Asked Questions
GST (Goods and Services Tax) is a single indirect tax applied on the supply of goods and services in India, replacing many earlier taxes like VAT and service tax.
Multiply the amount by 18 and divide by 100 to get the GST amount, then add it to the original amount for the total. Our GST Add Calculator does this instantly.
Divide the total by (1 + GST rate ÷ 100) to get the base amount, then subtract that from the total to find the GST. Try the GST Remove Calculator.
CGST and SGST are charged together on sales within the same state, splitting the GST equally between the central and state governments. IGST is charged on sales between two different states.
Yes. The calculator is fully responsive and works on any phone, tablet or desktop browser.
Ready to calculate your GST?
No sign-up, no downloads. Just enter an amount and get an accurate result in seconds.
Calculate GST Now