What is a GST Calculator?
A GST Calculator is a free online tool that helps you calculate gst amount, add or remove gst from any price with complete cgst, sgst and igst breakdown. FinCalc Pro offers India's most accurate GST Calculator with instant results, detailed charts, and step-by-step breakdowns — completely free with no login required.
GST Calculator Formula
For exclusive GST (adding to price): GST = Amount × Rate/100 | For inclusive GST (removing from price): Original = Amount / (1 + Rate/100)
How to Use GST Calculator
- Enter the base amount or GST-inclusive amount
- Select GST rate (5%, 12%, 18%, or 28%)
- Choose whether to add GST or remove GST from the amount
- Click Calculate to see CGST, SGST (or IGST for interstate)
- Copy the breakdown for your invoice or accounting
GST Calculator — Example
Base Price: ₹10,000 | GST Rate: 18% → CGST: ₹900 | SGST: ₹900 | Total GST: ₹1,800 | Final Price: ₹11,800
Benefits of Using GST Calculator
- Instantly calculate GST for invoicing
- Get CGST/SGST split for intrastate transactions
- Get IGST amount for interstate transactions
- Works for all GST slabs: 5%, 12%, 18%, 28%
Frequently Asked Questions — GST Calculator
What are the GST rates in India?
GST rates in India are: 0% (essential items like food grains), 5% (basic necessities), 12% (processed foods, electronics), 18% (most goods and services), 28% (luxury goods, automobiles, tobacco).
What is CGST and SGST?
For intrastate transactions, GST is split equally into CGST (Central GST) and SGST (State GST). For interstate transactions, IGST (Integrated GST) = CGST + SGST is charged.
How to calculate GST on an amount?
To add GST: Final Price = Base Price × (1 + GST Rate/100). To find GST amount: GST = Base Price × GST Rate/100. Example: ₹1,000 + 18% GST = ₹1,180. GST amount = ₹180.