GST Calculator
Add or remove GST at 5%, 12%, 18% or 28% and see the CGST/SGST split instantly.
For inter-state supply, the same total applies as a single IGST of 18%.
About the GST Calculator
Goods and Services Tax touches almost every transaction in India, and whether you are a freelancer raising an invoice, a small-business owner pricing a product, or a buyer checking a bill, you need to move between the base price and the GST-inclusive price quickly. The AlarmDaddy GST Calculator does both directions: add GST to a base amount, or extract GST from a tax-inclusive amount.
Enter the amount and pick the GST rate (5%, 12%, 18%, or 28% — the four main slabs, plus a custom option). Choose whether your amount is exclusive of GST (add it) or inclusive (remove it). The calculator shows the base price, the GST amount, the total, and the CGST/SGST split for intra-state transactions (each is half the total GST). For inter-state transactions it shows the equivalent IGST.
This is one of the most-used calculators by India's freelancers and small traders. Bookmark it for invoice time.
How to use this calculator
- 1Enter the amount.
- 2Choose whether the amount is exclusive (add GST) or inclusive (remove GST).
- 3Select the GST rate: 5%, 12%, 18%, 28%, or custom.
- 4Read the base price, GST amount, total, and the CGST/SGST split.
The formula
To add GST, multiply the base by the rate percentage. To remove GST from an inclusive amount, divide by (100 + rate) and multiply by 100 to recover the base. For intra-state supply, GST splits equally into Central GST and State GST; for inter-state supply it is a single Integrated GST of the same total.