Free GST Calculator
Free GST Calculator helps you calculate instantly with new GST rates (5%, 18%, 40%) and old GST rates. Easily check CGST, SGST and IGST for your invoice. This online GST Calculator is simple, fast and accurate, making tax calculations easier for businesses and individuals.
Free GST Calculator – Calculate Old and New GST Rates
If you are a business owner, accountant or student a Free GST Calculator, Easy GST Calculator, GST Calculator all of the easiest tools you can use to calculate Goods and Services Tax in seconds. Instead of doing manual calculations, this online calculator helps you quickly find GST amount, CGST, SGST/UTGST, and IGST for both new GST rates and old GST rates.
What is a GST Calculator?
A GST calculator is a simple online tool that helps you add or remove GST from the base price of goods and services. You just need to enter the amount and choose the GST rate, and the calculator instantly shows you the tax amount and total value. This saves time and reduces the chance of mistakes.
New GST Rates Effective 22 September 2025
The GST Council recently updated the rates to simplify the system. From 22 September 2025, the new GST rates are.
5% GST (CGST 2.5% + SGST 2.5%)
18% GST (CGST 9% + SGST 9%)
40% GST (CGST 20% + SGST 9%)
For interstate supply, IGST will apply at the full rate of 5%, 18%, or 40%.
Old GST Rates Before September 2025
Earlier, GST was charged at multiple slabs: 0%, 5%, 12%, 18%, and 28%. This often created confusion for businesses especially while filing returns and invoices. The new structure replaces these slabs with only three main rates, making compliance easies.
Benefits of Using Free GST Calculator
Calculate GST amount in seconds. Option to check both old and new GST rates. Helps with invoice preparation, billing and tax filing. Reduces human error in manual calculations. Works for CGST, SGST and IGST.
How to Use the Free GST Calculator?
Enter the taxable amount and Select whether you want to exclusive or inclusive GST and intrastate (CGST+SGST) or interstate (IGST). Choose the GST rate (new GST Rate – 5%, 18%, 40% or old GST slabs rate – 5%, 12%, 18%, 28%) or custom rate. Get instant result for CGST, SGST, IGST and total amount.
Final Words
The Free GST Calculator is a smart tool for everyone dealing with taxes. Whether you want to calculate GST under the new 2025 rates of compare with old rates, this calculator makes you work faster and more accurate. Try it today to save time and improve your billing process.