Free online GST calculator for India
GST Calculator
Add GST to an amount, remove GST from an inclusive price, and see CGST/SGST split instantly for common Indian GST rates.
Formula
Add GST
Final = Amount + (Amount x Rate / 100)
Remove GST
Taxable = Total / (1 + Rate / 100)
CGST + SGST
Each half = GST amount / 2
Free tool
Enter amount and GST rate
GST rate
Result
Final amount after GST
CGST
₹90.0
SGST
₹90.0
For interstate invoices, the same tax amount is usually shown as IGST instead of CGST and SGST split. Product classification, exemption, and compensation cess can change the applicable rate.
GST rates
Common rate slabs used in India.
GST rates depend on official classification and notifications. This calculator covers the common slabs people need for quick invoice math.
Quick guide
How to calculate GST online.
Enter the amount
Use the taxable value when adding GST, or the invoice total when removing GST.
Choose the GST rate
Pick 5%, 12%, 18%, 28%, or another available GST slab.
Read the result
Use the taxable value, GST amount, final price, and CGST/SGST split for quick estimates.
FAQ
GST calculator questions.
How do I add GST to an amount?
Enter the taxable amount, choose the GST rate, and keep the calculator on Add GST. The final amount is taxable value plus GST.
How do I remove GST from a GST-inclusive amount?
Enter the invoice total, choose the GST rate, and switch to Remove GST. The calculator extracts the taxable value and GST amount from the total.
What is the most common GST rate in India?
Many services and goods use 18%, but the correct GST rate depends on HSN/SAC classification, exemptions, notifications, and product category.
Does this calculator handle CGST, SGST, and IGST?
It shows CGST and SGST as equal halves for intrastate invoices. For interstate invoices, the same total tax is usually applied as IGST.
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