Instantly calculate GST for your invoices, billings, and accounting records. Seamlessly add Goods and Services Tax to an exclusive amount or uniquely reverse-calculate to extract the base price from a GST-inclusive total.
How to use the GST Calculator?
1. Select Mode: Choose "Add GST" if your base price doesn't include tax yet. Choose "Remove GST" if you have the final invoice amount and need to find the original price before tax.
2. Enter Amount: Type your transaction value.
3. Select Tax Rate: Click standard Indian GST slabs (3%, 5%, 12%, 18%, 28%) or type a custom percentage.
4. Get Results: The tool instantly displays the Net Amount, total GST Amount, CGST/SGST split, Gross Total, and writes the final total in words for easy invoice copying.
GST Formulas Explained
Frequently Asked Questions
In India, GST is a dual tax system. For intra-state sales (within the same state), the total GST is split equally into Central GST (CGST) and State GST (SGST).
Integrated GST (IGST) is levied on all inter-state supplies (between different states) of goods and services. It is equal to the total GST rate (i.e. if GST is 18%, IGST is 18%).
Use our "Remove GST (Inclusive)" tab. Enter the total bill amount and the GST rate. The calculator will reverse the math and give you the base price before tax was added.
The primary GST slabs in India are 0% (exempted), 5%, 12%, 18%, and 28%. There are also special rates of 0.25% on rough precious stones and 3% on gold.
When writing legal cheques or formal invoices, writing the total amount in words is legally required to prevent fraud or alteration of the numeric figures.