GST Calculator
Add GST to a price or extract GST from an inclusive price, with the CGST + SGST or IGST split and amount in words.
About GST Calculator
This free GST calculator adds GST to a price or removes it from a GST-inclusive amount in one step. Enter the amount, choose Add GST or Remove GST, and pick a rate: the current 5%, 18% and 40% slabs, 3% for gold and jewellery, or a custom rate. Older 12% and 28% rates are kept for past invoices.
Choose intra-state to see the CGST and SGST split, or inter-state for IGST. The result shows the base price, tax, total and the amount in words, handy for invoices and quotes. It is a quick way to work out GST from the total amount, and it runs in your browser.
How to use GST Calculator
- Enter the amount and choose Add GST or Remove GST.
- Pick the GST rate or enter a custom rate.
- Choose intra-state (CGST + SGST) or inter-state (IGST) to see the split.
Frequently asked questions
How do I add GST to a price?
GST = Price × Rate ÷ 100 and Total = Price + GST. For ₹10,000 at 18%, GST is ₹1,800 and the total ₹11,800.
How do I remove GST from an inclusive price?
Base price = Inclusive price × 100 ÷ (100 + Rate). For ₹11,800 at 18%, the base is ₹10,000 and GST ₹1,800.
When is it CGST + SGST and when IGST?
For a sale within the same state (or union territory), the tax is split equally into CGST and SGST/UTGST. For a sale to another state, or imports and exports, the full rate is charged as IGST.
What are the current GST rates?
From 22 September 2025 most goods and services are taxed at 5% or 18%, with 40% for luxury and sin goods, 3% for gold and jewellery and 0.25% for rough diamonds. The 12% and 28% slabs were removed; use Custom for any other rate.
How do I calculate GST from the total amount?
Divide the inclusive amount by (1 + rate ÷ 100) to get the base price; the difference is GST. For ₹1,180 at 18%, the base is ₹1,000 and GST ₹180.
What is the full form of CGST?
Central Goods and Services Tax, the central government's share of GST on an intra-state sale.
What is the GST rate on gold jewellery?
Gold and gold jewellery attract 3% GST. Select the 3% rate to add it to, or remove it from, a price.
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