India · Tax
GST Calculator
Calculate GST amounts online in India for 5%, 12%, 18% & 28% slabs. Add or reverse-calculate GST inclusive and exclusive prices easily on 1CalcHub.
Interactive calculator
Add or reverse GST
Switch between exclusive and inclusive tax mode so you can start from either the pre-tax amount or the final billed amount.
Results
Base amount
₹25,000
GST amount
₹4,500
Total amount
₹29,500
How to use it
- 01Enter the transaction amount you are working with.
- 02Choose the GST rate that applies to the product or service.
- 03Switch between exclusive and inclusive mode depending on whether tax is already included.
Result guide
- Base amount is the price before GST.
- GST amount is the tax component separated for visibility.
- Total amount is the final payable price after tax.
About this calculator
GST calculations appear in quotes, invoices, and price comparisons every day. This tool handles both modes: adding GST to a pre-tax value and splitting GST out of an all-inclusive price.
The reverse-calculation mode is useful when a client or marketplace gives you a final price and you need to know the tax and base amount inside it.
Frequently asked questions
What is the difference between inclusive and exclusive GST?
Exclusive GST adds tax on top of the base amount. Inclusive GST starts with the final price and splits the tax portion out of it.
Can I use this for the common 5, 12, 18, and 28 percent slabs?
Yes. The rate field is flexible, so it works for common GST slabs and custom percentages too.
Does this calculator decide which GST rate applies?
No. You still need to choose the correct rate based on the product or service classification.
Method and limitations
This calculator uses the formula and assumptions described on this page. We do not claim independent professional review. Direct references will be listed here when they support a specific rule or data source used by this calculator.
Results are estimates for general information. Verify current rules and assumptions before making financial, tax, or health decisions.
Read our Editorial and Verification Policy →Related calculators
Keep the next question one click away.
EMI Calculator
Calculate loan EMI, interest, and repayment schedules in India. Get instant monthly amortization breakdowns for home & car loans on 1CalcHub.
SIP Calculator
Calculate mutual fund SIP returns and wealth growth in India. Get instant monthly compounding, profit & maturity projections with graphs on 1CalcHub.
Percentage Calculator
Calculate percentages, percent change, markups & discounts with step-by-step formulas. Solve percentage problems instantly and free on 1CalcHub.