GST Calculator
Add GST to a price or take it out of one, see the CGST, SGST or IGST split, total a bill with several rates — and look up the current GST rate of everyday goods and services.
At a glance
- Adds GST to a price or removes GST from a price that already includes it, at the current slabs of 5%, 18% and 40% — plus 0%, 0.25%, 1.5% and 3%, and the old 12% and 28% for earlier bills.
- Splits the tax into CGST + SGST for a sale within one state, or IGST for a sale to another state.
- ₹10,000 + 18% GST = ₹11,800 (CGST ₹900 + SGST ₹900). Taking 18% GST out of ₹10,000 leaves ₹8,474.58 before tax and ₹1,525.42 of GST.
- Totals a bill with several items at different rates, with a rate-wise summary of taxable value, CGST, SGST or IGST, and round-off — downloadable as CSV.
- Works out the GST payable after input tax credit: the tax on a sale less the tax already paid on the purchase.
- Has a GST rate finder for over 90 everyday goods and services, with the rates in force since 22 September 2025 (and tobacco at 40% since 1 February 2026).
- Shows the working and the amount in words. Everything runs in your browser; nothing is uploaded.
Step by step
How to calculate GST
- 1
Choose add or remove
Pick Add GST if your price is before tax, or Remove GST if the price already includes it.
- 2
Enter the amount
Type the price in rupees.
- 3
Pick the GST rate
Tap 5%, 18% or 40%, type any other rate, or search the rate finder below for your product.
- 4
Choose the type of sale
Keep The same state for CGST + SGST, or switch to Different states for IGST.
- 5
Read the result
See the taxable value, each tax and the total, with the working and the amount in words. Copy it, or build a full bill below.
Features
Everything you need, nothing you don’t
Add or remove GST
From a price before tax to the total, or from an MRP or bill total back to the taxable value.
CGST, SGST, IGST
Equal CGST and SGST for a sale in the same state, IGST across states — rounded to the paisa.
Current 2026 slabs
5%, 18% and 40% one tap away, with the special 3% for gold and the old 12% and 28% for past invoices.
Multi-item bill
Up to 30 items, each with its own quantity, price and rate, prices with or without GST.
Input tax credit
See the net GST a registered seller actually pays, and the profit on the deal.
Rate finder
Search mobile, cement, gold, hotel, medicine or insurance and tap the rate to use it.
GST calculation formulas
To add GST: GST = price × rate ÷ 100, and total = price + GST. For ₹10,000 at 18%: GST = 10,000 × 18 ÷ 100 = ₹1,800, so the total is ₹11,800.
To remove GST (reverse calculation): value before GST = total ÷ (1 + rate ÷ 100), and GST = total − value. For a ₹11,800 bill at 18%: 11,800 ÷ 1.18 = ₹10,000, so the GST inside it is ₹1,800.
Do not simply take the percentage off the total. 18% of ₹11,800 is ₹2,124 — too much, because GST is charged on the value before tax, not on the total.
GST rates in 2026
Since 22 September 2025 GST has two main slabs, a merit rate of 5% and a standard rate of 18%, and a 40% rate for a short list of luxury and sin goods. The 12% and 28% slabs were abolished.
| GST rate | What it covers |
|---|---|
| Nil | Fresh food, milk, bread and roti, paneer, notebooks and pencils, individual health and life insurance, 36 life-saving medicines |
| 0.25% / 1.5% | Rough diamonds / cut and polished diamonds |
| 3% | Gold, silver, platinum and jewellery |
| 5% | Packaged food, butter and ghee, toothpaste, soap and shampoo, medicines, clothes and footwear up to ₹2,500, tractors, bicycles, hotel rooms up to ₹7,500, gyms and salons |
| 18% | The standard rate: mobile phones, laptops, TVs, air conditioners, cement, small cars, motorcycles up to 350 cc, and most services |
| 40% | Aerated and energy drinks, larger cars and SUVs, motorcycles above 350 cc, yachts, betting and casinos, cigarettes and pan masala |
How much of an inclusive price is GST?
When a price already includes GST, the tax is a smaller share of it than the rate suggests. Divide the price by the number in the last column to get the value before tax.
| GST rate | GST as a share of the inclusive price | Divide the price by |
|---|---|---|
| 3% | 2.91% | 1.03 |
| 5% | 4.76% | 1.05 |
| 12% (old) | 10.71% | 1.12 |
| 18% | 15.25% | 1.18 |
| 28% (old) | 21.88% | 1.28 |
| 40% | 28.57% | 1.40 |
CGST, SGST and IGST
- CGST (central GST) and SGST (state GST) apply together to a sale within one state. Each is half the rate: 18% GST is 9% CGST + 9% SGST.
- UTGST replaces SGST in union territories without a legislature, such as Chandigarh and Ladakh.
- IGST (integrated GST) applies to a sale from one state to another, and to imports. It is the full rate as one tax: 18% IGST.
- The total tax is the same either way — only where the money goes differs.
What changed with GST 2.0
The GST Council’s 56th meeting on 3 September 2025 replaced the four slabs of 5%, 12%, 18% and 28% with 5% and 18%, plus 40% for a few goods. Most 12% items moved to 5%, and most 28% items — air conditioners, large TVs, cement, small cars, motorcycles up to 350 cc — moved to 18%. The new rates apply from 22 September 2025.
The compensation cess on cars, aerated drinks and coal ended on the same day, which is why larger cars are now a flat 40% instead of 28% plus cess. Cigarettes, pan masala and other tobacco products moved to 40% on 1 February 2026, charged on the printed retail price, with a separate excise duty or health cess on top.
Input tax credit
A GST-registered business does not pay the whole GST it collects. It deducts the GST it paid on its own purchases — the input tax credit — and pays the difference. Buy goods for ₹10,000 + ₹1,800 GST and sell them for ₹12,000 + ₹2,160 GST: the tax to pay is 2,160 − 1,800 = ₹360, which is 18% of the ₹2,000 of value added.
FAQ
Frequently asked questions
How do I calculate GST on an amount?
How do I remove GST from a total?
What are the GST rates in 2026?
Is 12% or 28% GST still charged?
What is the difference between CGST, SGST and IGST?
What is the GST on mobile phones, gold and cars?
How is GST rounded?
Is anything I enter stored or uploaded?
Keep going
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