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Home › Finance Tools › GST Calculator
Add or remove GST from any price — choose the applicable slab (5%, 12%, 18%, 28%) and see the full breakdown of base price, GST amount, and total.
GST calculator · add or remove GST · custom rate · net GST gross · instant results
Type the price you’re working with (base price or GST-inclusive total).
Choose from the standard Indian GST slabs: 5%, 12%, 18%, or 28%. Or enter a custom rate.
Base price (excluding GST), CGST and SGST split (for intra-state), IGST (for inter-state), and final GST-inclusive total.
India’s GST has four main tax slabs: 5% (essential goods — food grains, some services), 12% (processed foods, business class travel), 18% (standard rate — most goods and services, restaurants with AC), and 28% (luxury goods, sin goods — cars, tobacco, high-end electronics). A 0% rate applies to exempt goods and services (fresh food, healthcare, education).
For intra-state transactions (buyer and seller in the same state), GST is split equally between the Central government (CGST) and the State government (SGST). At 18% total, that’s 9% CGST + 9% SGST. For inter-state transactions (different states), the full rate is paid as IGST (Integrated GST) to the Central government, which then redistributes to the destination state.
Divide the inclusive price by (1 + rate/100). At 18% GST: a ₹118 inclusive price → base = 118 / 1.18 = ₹100, GST = ₹18. The calculator handles this automatically in “Remove GST” mode.
No. All calculations run in your browser. No data is transmitted.
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India’s GST system applies different rates across four main slabs, with further complexity in how the same transaction is split differently depending on whether it’s intra-state or inter-state. This calculator handles both directions — add GST to a base price or extract the base price from a GST-inclusive amount — and shows the CGST/SGST split for intra-state transactions and the IGST equivalent for inter-state context. It covers all four standard slabs (5%, 12%, 18%, 28%) as well as a custom rate field, making it useful for invoicing, procurement decisions, competitive pricing, and quick verification of tax amounts on purchase bills.
All calculations run in your browser. No data is transmitted to any server.