GST Calculator
Add GST to a price or remove it from a total in one tap — with the CGST/SGST split for every GST slab.
GST amount: ₹180
CGST (9.0%): ₹90 · SGST (9.0%): ₹90
Net (excl. GST): ₹1,000 · Gross (incl. GST): ₹1,180
Calculate GST in 3 simple steps
Pick a direction
Choose Add GST to a base price, or Remove GST from a tax-inclusive total.
Enter the amount
Type the price or total in ₹ and select the GST slab — 3%, 5%, 12%, 18% or 28%.
See the breakdown
Instantly get the GST amount, final price and the equal CGST/SGST split.
Why use this GST calculator
Add or remove GST
Works both ways — build a price up from a base, or strip GST out of a total.
CGST/SGST split
Automatically shows the equal central and state split for intra-state sales.
All Indian slabs
Supports 3%, 5%, 12%, 18% and 28% — or type any custom GST rate.
Instant results
Perfect for invoices, billing and quick price checks — no manual maths.
100% private
Your amounts stay on your device; nothing is uploaded or stored.
Free & unlimited
No sign-up, no limits — calculate GST as often as you need.
Calculate GST the easy way
Goods and Services Tax (GST) applies to most goods and services in India at slabs of 3%, 5%, 12%, 18% or 28%. Whether you are a shopkeeper pricing a product, a freelancer raising an invoice, or a buyer checking a bill, this calculator handles both directions — adding GST to a base price, or extracting the GST already included in a total.
For sales within the same state, GST is shared equally as CGST (central) and SGST (state), which the calculator shows automatically. It runs in your browser, so your figures stay private.