GST Calculator
Calculate GST and get CGST/SGST breakdown instantly for Indian tax slabs.
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Understanding GST in India
GST — Goods and Services Tax — replaced a patchwork of indirect taxes in India in 2017. Whether you’re a business owner calculating how much tax to charge, a consumer checking whether a quoted price includes GST, or an accountant verifying a tax amount, this calculator gives you the breakdown instantly.
How It Works
Select whether your amount is before GST (exclusive — add GST to it) or already includes GST (inclusive — remove GST from it). The calculator shows the base amount, GST component, total, and the CGST/SGST split for intra-state transactions or IGST for inter-state.
The Formula
Add GST: Total = Amount × (1 + GST%/100)
Remove GST: Base = Total ÷ (1 + GST%/100)
GST Amount = Total − Base
CGST = SGST = GST Amount ÷ 2 (intra-state)
IGST = GST Amount (inter-state)
GST Slab Reference
| GST Rate | Common Items |
|---|---|
| 0% | Essential food items, milk, eggs, fresh vegetables |
| 5% | Packaged food, coffee, tea, restaurant meals (non-AC) |
| 12% | Butter, ghee, fruit juice, mobile phones |
| 18% | AC restaurant meals, electronics, most services, software |
| 28% | Luxury goods, cars, cigarettes, aerated drinks |
How It Works & Educational Guide
How To Use
- Enter the original amount (Price before or after GST).
- Select the appropriate GST tax slab (e.g., 5%, 12%, 18%, 28%).
- Click to either add GST to the net price or extract GST from the gross price.
Frequently Asked Questions
What are the standard GST tax slabs currently in effect in India?
As of 2024, the primary Goods and Services Tax (GST) slabs in India are 5%, 12%, 18%, and 28%, with specific categories sometimes qualifying for 0% (exempt) or special luxury cess rates. These slabs are applied based on the classification of the product or service, with essential goods typically falling into lower brackets and luxury items into the highest 28% bracket. Our calculator allows you to select any of these standard rates to see an immediate and accurate breakdown of the tax components for your transaction. Staying informed about these slabs is vital for accurate business accounting and personal budget management.
What is the core difference between GST Inclusive and GST Exclusive prices?
A GST Inclusive price means that the tax amount is already "baked into" the final total you see on the tag, whereas a GST Exclusive price requires the tax to be added on top of the base cost. When calculating Inclusive GST, our tool uses a back-calculation formula to identify the original "net" price and the specific tax portion hidden within it. For Exclusive calculations, we simply add the specified percentage to your base value to find the final total you will pay at checkout. Understanding this distinction is essential for businesses when issuing invoices or for consumers comparing prices across different retailers.
How are CGST and SGST split for intra-state business transactions?
For transactions that occur within a single state, the total GST amount is split exactly 50/50 between the Central Government (CGST) and the State Government (SGST). For example, if a product has an 18% GST rate, 9% goes to the center and 9% goes to the state treasury where the consumption takes place. Our calculator provides a clear and separate line item for both CGST and SGST so you can see exactly how the revenue is distributed according to national tax laws. This transparency is particularly helpful for small business owners who must report these figures separately in their monthly or quarterly tax filings.
Can this tool also calculate Integrated GST (IGST) for inter-state trade?
Yes, for transactions that happen between two different states, the Integrated GST (IGST) is applied, which is equal to the full combined rate of CGST and SGST. The IGST is collected by the Central Government and luego distributed to the destination state based on the consumption-based tax model of the GST system. When you use our calculator, the "Total GST" figure represents the IGST amount for any inter-state or import transaction you are modeling. This makes our tool a versatile utility for both local retailers and national distributors who need to manage complex tax obligations across multiple regions.
How can I "Remove" GST from a final total to find the base item price?
To find the original price before tax, select the "GST Inclusive" option in our tool and enter the final amount you paid; the calculator will perform the "inverse GST" math for you. The formula for this is [Total Amount / (1 + (Rate / 100))], which reveals the raw value of the item before the government took its share. This feature is incredibly useful for expense tracking, as it allows you to see the real cost of the goods you are purchasing for your business or household. Once you know the base price, you can more easily compare the value of different suppliers regardless of their tax status.
Reviewed by Lion Tax Team · Updated April 26, 2026