India compliance
GST Calculator
Add GST to a base amount or reverse-calculate the GST already included in a total bill.
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India billing utility
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.
Why this page matters
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.
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