GST Calculator
Add or remove GST from any amount across all standard tax slabs — instantly.
Enter the base price (before tax) to calculate GST-inclusive total.
Enter an amount above to calculate GST breakdown. CGST and SGST apply to intra-state transactions; IGST applies to inter-state transactions.
GST slabs shown (5%, 12%, 18%, 28%) are standard rates. Actual applicable rate may vary by goods or service category. Always verify at gstn.gov.in.
What is GST Calculator?
GST Calculator lets you compute GST-inclusive and GST-exclusive prices for any amount across India's standard tax slabs of 5%, 12%, 18%, and 28%. Use 'Add GST' mode to find the total price when tax is applied to a base amount, or 'Remove GST' mode to extract the original price from a GST-inclusive total.
The result shows the CGST and SGST breakdown (each half the total GST, for intra-state transactions) as well as the full IGST amount (for inter-state transactions). This is useful for vendors, freelancers, business owners, and accountants who need to quickly verify invoice amounts.
All calculations are purely mathematical — no data is sent to any server.
Common Use Cases
- Generating correct invoice amounts for clients
- Verifying GST charged on a bill
- Finding the base price of a product from its MRP
- Calculating tax liability for quarterly GST returns
- Comparing prices across GST slabs for different product categories
How to Use GST Calculator
- Choose 'Add GST' if you have the base price and want the total, or 'Remove GST' if you have the inclusive price and want to extract the base.
- Enter the amount in the input field.
- Select the applicable GST slab: 5%, 12%, 18%, or 28%.
- CGST, SGST, IGST, and the final total are displayed instantly.
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FAQ
What is the difference between CGST, SGST, and IGST?
For intra-state transactions (buyer and seller in the same state), GST is split into CGST (Central GST) and SGST (State GST), each at half the total rate. For inter-state transactions (buyer and seller in different states), the full rate is charged as IGST (Integrated GST), which the central government then distributes.
How do I find the original price from a GST-inclusive amount?
Use 'Remove GST' mode. If the GST rate is 18%, the formula is: Original Price = Inclusive Amount ÷ 1.18. The calculator does this automatically — just enter the inclusive amount and select the slab.
Which GST slab applies to which goods?
GST slabs in India are set by the GST Council and change periodically. Common examples: 5% on basic food items, 12% on processed foods and apparel, 18% on most services, electronics, and software, 28% on luxury goods, automobiles, and tobacco. Always verify the applicable rate on gstn.gov.in.
Is this calculator useful for GST filing?
Yes, for quick verification and estimation. However, for formal GST return filing, use the official GSTN portal or approved accounting software, as actual liability may include adjustments, input tax credit (ITC), and other factors.
What is the GST rate on services?
Most services in India attract 18% GST. Some services like healthcare and education are exempt (0%), restaurants charge 5% (without ITC) or 12% (with ITC), and financial services, insurance, and legal services are typically 18%. The exact rate depends on the specific service — check gstn.gov.in.