GST Calculator
Add GST to a price or pull the tax out of an inclusive amount — with the CGST, SGST and IGST split shown instantly.
= ₹1,000
Within one state: CGST + SGST. Between two states: IGST (the full rate).
How to calculate GST in 3 steps
Pick 'Add GST' if you have a base price and want the final bill amount. Pick 'Remove GST' if you have an inclusive price (like a bill total) and want to know how much of it is tax.
Type your amount and tap a standard slab — 3%, 5%, 12%, 18% or 28% — or type any custom rate.
You get the base amount, the GST amount, the total, and the CGST/SGST/IGST breakup — updated live as you type.
Where this calculator helps
Work out the final invoice amount from your base price, with the exact CGST and SGST lines to print on the bill.
Got an inclusive price? Remove GST to see the true base value and how much tax you actually paid.
Quickly quote both 'with GST' and 'without GST' prices when a customer asks.
Cross-check tax amounts on purchases and sales before entering them in GSTR filings.
Benefits
- Handles both GST-exclusive (add) and GST-inclusive (remove/reverse) amounts.
- One-tap buttons for all common slabs: 3%, 5%, 12%, 18%, 28% — plus any custom rate.
- Automatic CGST + SGST split for intra-state and IGST for inter-state sales.
- Runs entirely in your browser — your amounts never leave your device.
Calculators for each GST slab
Important note
This tool provides an estimate based on the values you enter. Actual loan, tax, salary or investment results can differ. Verify important financial decisions with the relevant lender, employer, tax rules or qualified professional.
Frequently asked questions
How is GST calculated on a price?
To add GST: GST amount = base price × rate ÷ 100, and the total = base price + GST. For example, ₹1,000 at 18% GST gives ₹180 tax and a total of ₹1,180.
How do I remove GST from an inclusive amount?
Use the reverse formula: base price = inclusive amount × 100 ÷ (100 + rate). For example, if a bill of ₹1,180 includes 18% GST, the base is ₹1,000 and the GST portion is ₹180. The 'Remove GST' mode does this for you.
What are the GST rates in India?
The main GST slabs are 5%, 12%, 18% and 28%, with a special 3% rate for gold and some items at 0%. Rates can change with GST Council decisions, so always confirm the current rate for your product or service (HSN/SAC code) before billing.
What is the difference between CGST, SGST and IGST?
For a sale within the same state, GST is split equally into CGST (central) and SGST (state) — 18% becomes 9% + 9%. For a sale between two states, the full rate is charged as a single IGST. The total tax is the same either way.
Is this GST calculator free?
Yes. It's completely free with no sign-up. Everything is calculated in your browser, so the amounts you enter are never uploaded or stored anywhere.
Can I use this for reverse GST calculation?
Yes. Switch to 'Remove GST' mode, enter the GST-inclusive amount and the rate, and you'll instantly see the base value and the exact tax portion — this is exactly what a reverse GST calculator does.
More free tools
See your monthly EMI, total interest, and full cost for any loan amount, rate and tenure.
Take-home Salary Calculator →Turn your CTC into monthly in-hand pay under the new tax regime, with the full deduction breakdown.
SIP Calculator →See how much your monthly SIP could grow to, with invested amount and estimated returns broken down.
WhatsApp Link Generator →Create a click-to-chat link with a pre-typed message, see a live preview, and download a custom QR. No need to save the number.
Image Resizer for Forms →Resize a photo or signature to exact pixels and an exact KB size — perfect for exam and government forms.
Image to PDF Converter →Turn photos into a PDF and keep it under a KB limit — 100 KB, 200 KB or your own — for exam and government form uploads.
Compress PDF →Shrink a PDF to fit an exact size limit — 100 KB, 200 KB or your own — for exam and government form uploads.
PDF to JPG Converter →Turn every page of a PDF into a JPG or PNG image — download one page or all of them as a ZIP.
Land Area Converter →Convert bigha, katha, biswa, gaj, guntha, cent, acre and more — with the right value for your state.
Marriage Biodata Maker →Make a clean marriage biodata with your photo in Hindi or English — download as PDF or image, free.
Photo Background Remover & Changer →Remove a photo's background and set it to white, blue or any colour — ready for passport and form uploads.
Photo Name & Date Maker →Write your name and the date onto a photo — the way exam and job forms ask for it.
Typing Speed Test (Hindi & English) →Check your typing speed against SSC and clerk exam targets — or start learning from scratch.
PDF Password Remover →Remove a password you already know from a PDF — bank statements, payslips, cards — and save an unlocked copy. Nothing is uploaded.
GPS Speedometer — Speed Test →Measure your real-time speed with GPS — km/h, mph or knots, with max speed, distance and a HUD mode.
Speed Converter →Convert between km/h, mph, knots, m/s and ft/s instantly — with a common-values reference table.
Plot Area Calculator →Enter a plot's length and width to get its area in sq ft, gaj, sq m, acre and more — with a to-scale drawing.
Land Price Calculator →Work out a plot's total price from its area and rate — or find the rate per sq ft / gaj from a total.
Your Life in Numbers →Enter your birth date and see fun stats — days lived, heartbeats, full moons seen — as a shareable card.
Screen Ruler →Turn your screen into a real cm / inch / px ruler — auto-detects your device, or calibrate with a card.
Stamp Duty Calculator →Calculate stamp duty, registration charges and total property cost for any Indian state — with women's concession built in.