GST Calculator
Add GST to a price or take it out, with the CGST, SGST and IGST split.
Breakdown
- Amount before GST
- ₹10,000.00
- CGST @ 9%
- ₹900.00
- SGST @ 9%
- ₹900.00
- Total GST
- ₹1,800.00
Price
How is this calculated?
Add GST tax = amount × rate ÷ 100
Remove GST net = amount × 100 ÷ (100 + rate)
Within a state: CGST = SGST = tax ÷ 2
Between states: IGST = taxRuns in your browser — nothing you enter leaves this device.
A calculation aid, not tax advice. Rates depend on the specific goods or service — verify against the current GST notification before invoicing.
About this tool
What it does
This calculator adds GST to a pre-tax price, or works backwards from a GST-inclusive price to the amount before tax. It shows how the tax divides between the Centre and the State: CGST and SGST for a sale within one state, or IGST for a sale between states.
How to use it
- Choose whether the amount you have is before GST (add) or already includes it (remove).
- Enter the amount.
- Pick a rate, or type a different one if your item is taxed at another rate.
- Choose within-state or between-states to see the CGST and SGST, or IGST, split.
- Copy the breakdown to paste into an invoice or message.
Limits and your data
- The rate buttons reflect the common slabs in force since 22 September 2025. The rate for a particular item depends on its HSN or SAC code — check it before you invoice.
- Compensation cess, where it applies to some goods, is not included.
- Amounts are rounded to the paisa. Invoicing software may round per line item, so totals on a long invoice can differ by a paisa or two.
- Tax rules change with GST Council decisions and the Union Budget. Verify rates on the official CBIC GST rate finder.
- The amounts are calculated on this page only. Nothing is saved, put in the address bar or sent anywhere.
Questions
How do I remove GST from a price?
Choose "Remove GST", enter the price that includes tax, and pick the rate. For 18%, the net amount is the price × 100 ÷ 118 — not the price minus 18%, which is a common mistake.
When is it CGST and SGST, and when is it IGST?
A sale where the supplier and the place of supply are in the same state carries CGST and SGST, each half of the rate. A sale to another state, or an import, carries IGST at the full rate.
What are the GST rates now?
Since 22 September 2025 most goods and services fall under 5% or 18%, with 40% for certain goods such as tobacco products, and special low rates like 3% for gold and 0.25% for rough diamonds. Many essentials are exempt.
Why is subtracting 18% from a GST-inclusive price wrong?
The 18% was added to the net amount, not to the final price. Taking 18% off ₹1,180 gives ₹967.60, but the correct net amount is ₹1,000.