GST Calculator
Calculate Goods and Services Tax on a price in India. Find the taxable value, GST amount, CGST, SGST, IGST and final price using a selected GST rate.
Calculate GST amount and price
Choose how your price is entered, select a GST rate and tax type, then enter the amount in rupees.
This is a mathematical estimate using the GST rate you select. Confirm the applicable rate, exemptions, place of supply and tax treatment for your transaction with official GST guidance or a tax professional.
What is a GST Calculator?
A GST calculator is an online tool that helps estimate the Goods and Services Tax amount on a taxable value or extract the tax component from a GST-inclusive price. Businesses, ecommerce sellers, retailers and customers can use it to understand the taxable value, tax amount and total price.
Enter a price, choose whether GST should be added or removed, select the applicable rate and choose the tax type. For an intra-state supply, the tool displays CGST and SGST separately. For an inter-state supply, it displays IGST.
How to use this GST Calculator
- Choose the calculation type: Select Add GST when you have a price before tax, or Remove GST when the entered price already includes GST.
- Select the GST rate: Choose the rate applicable to your goods or services. Use Custom rate only when you know the correct rate.
- Select the tax type: Choose Intra-state for a qualifying supply within one state or Inter-state for a qualifying supply between states.
- Enter the amount: Add the taxable price or GST-inclusive price in rupees.
- Read the breakup: Review taxable value, total GST and the CGST/SGST or IGST split.
GST calculation formulas
GST = Taxable value × GST rate ÷ 100Taxable value + GST amountGST = Inclusive price × Rate ÷ (100 + Rate)Inclusive price − GST amountFor the calculator's simple tax split, CGST and SGST are each half of the total GST for an intra-state supply. The full GST amount is shown as IGST for an inter-state supply. Actual tax treatment depends on the applicable GST law and transaction facts.
GST calculation example
If the taxable value is ₹1,000 and the selected GST rate is 18%, the estimated GST is ₹180 and the price including GST is ₹1,180.
| Taxable value | ₹1,000.00 |
|---|---|
| GST rate | 18% |
| Total GST | ₹180.00 |
| CGST (intra-state example) | ₹90.00 |
| SGST (intra-state example) | ₹90.00 |
| Price including GST | ₹1,180.00 |
CGST, SGST and IGST: what is the difference?
- CGST: Central Goods and Services Tax, generally levied by the Central Government along with SGST on an intra-state taxable supply.
- SGST: State Goods and Services Tax, generally levied by the relevant State Government along with CGST on an intra-state taxable supply.
- IGST: Integrated Goods and Services Tax, generally applicable to inter-state supplies and certain other supplies under GST law.
Whether a supply is intra-state or inter-state is determined under GST place-of-supply rules, not simply by the seller's preferred selection. Check the rules for your transaction.
Frequently asked questions
How do I calculate 18% GST on ₹1,000?
For a price before GST, 18% of ₹1,000 is ₹180. The total price including GST is ₹1,180.
How do I remove GST from an inclusive price?
Use the Remove GST option, select the applicable rate and enter the total price that already includes GST. The calculator estimates the taxable value and tax component.
When are CGST and SGST used?
CGST and SGST are generally used together for an intra-state taxable supply, subject to the applicable GST rules.
When is IGST used?
IGST is generally applicable to inter-state supplies and certain other supplies as provided under GST law. Place-of-supply rules determine the treatment.
Can I use a custom GST rate?
Yes, the calculator allows a custom numerical rate. You are responsible for selecting the legally applicable rate for the goods or services.
Does this calculator confirm my GST liability?
No. It provides a mathematical estimate only. Exemptions, reverse charge, place of supply, input tax credit and other rules can affect actual tax treatment. Consult official GST resources or a qualified tax professional.
General educational information only. Verify the applicable GST rate and legal treatment for each transaction before invoicing or filing returns.