GST Calculator — India
Add GST to a base price or remove GST from an inclusive amount. Supports all Indian GST slabs: 5%, 12%, 18%, and 28%. Shows CGST and SGST breakdown.
Calculate GST clearly
Add GST, remove GST, and check CGST/SGST or IGST split in one clean workspace.
Taxable value
₹1,000
Base price
GST amount
₹180
Tax amount
Final amount
₹1,180
Including GST
Final amount after GST
₹1,180
₹1,000 + ₹180 GST = ₹1,180.
CGST + SGST
₹90 + ₹90
Tax breakdown and formula
CGST
₹90
9% central GST
SGST
₹90
9% state GST
IGST
₹0
Use for inter-state
GST amount = Taxable value × GST rate ÷ 100
What this tool does
Enter an amount and GST rate. Choose whether to add GST to a base price or extract GST from a total inclusive price. The calculator shows the GST amount, the base price, the final total, and the CGST/SGST split for intra-state transactions.
When to use it
Use this for preparing quotations, invoices, purchase orders, and expense claims. Also useful for understanding the tax component of any price before buying or selling goods and services in India.
Frequently Asked Questions
What GST rates does this calculator support?
This calculator supports all standard Indian GST slabs: 0%, 5%, 12%, 18%, and 28%. Select the applicable rate for your product or service.
How do I calculate GST inclusive price?
If your price already includes GST, use the 'Remove GST' mode. Enter the total (GST-inclusive) amount and the GST rate, and the tool will show you the base price and the GST amount separately.
How do I add GST to a base price?
Use the 'Add GST' mode. Enter the price before tax (base price) and the GST rate. The tool calculates the GST amount and shows the total payable amount.
What is CGST and SGST?
For intra-state transactions (within the same state), GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions, it is IGST (Integrated GST). For example, 18% GST intra-state is 9% CGST + 9% SGST.
Can I use this for invoicing?
Yes. Calculate the GST breakdown using this tool, then use the values in your invoice. For a ready-made GST invoice, try the Invoice Generator tool.
Is GST applicable on all goods and services?
No. Some goods and services are exempt from GST (like fresh produce, milk, healthcare). Others fall under a 0% slab. Check the official GST rate schedule for your specific product or service category.