Goods and Services Tax (GST) is a unified indirect tax levied on goods and services across India. This free online GST calculator enables business owners, accountants, shoppers, and students to calculate tax amounts instantly. It supports both GST-exclusive (tax added to base price) and GST-inclusive (tax embedded in total price) modes, providing a detailed CGST, SGST, and IGST breakdown.
Input your base or gross transaction value and choose the relevant GST slab (5%, 18%, or 40%).
Select GST Exclusive to add tax onto your amount, or GST Inclusive to separate embedded tax from total value.
Inspect the calculated net taxable value, total GST, and the intra-state split (CGST + SGST) vs interstate (IGST).
Click "Copy Summary" to quickly paste formatted figures into messages, or "Print" to create a printed copy.
GST Exclusive means tax is added on top of the net base amount, increasing the final payable amount. GST Inclusive means tax is already included within the total price, so the calculator deducts tax to reveal the underlying taxable amount.
CGST (Central GST) and SGST (State GST) apply to intra-state trade within the same state and are divided equally between the Central and State governments. IGST (Integrated GST) applies to inter-state sales across state borders and is collected directly by the Central Government.
Effective 22 September 2025 under the GST 2.0 reform, India simplified its tax structure from the earlier four-slab system (5%, 12%, 18%, 28%) down to three active slabs: 5%, 18%, and 40%. The 40% demerit rate applies to luxury and sin items like tobacco, pan masala, aerated drinks, high-capacity vehicles, yachts, and online gaming, while standard supplies fall under 5% and 18%.
Yes, you can select 'Custom GST Rate (%)' from the GST Rate Slab dropdown and enter any custom rate to calculate GST, net taxable value, and gross totals.
Click the "Copy Summary" button at the top right to instantly place a formatted breakdown on your clipboard. To generate a physical receipt or save a PDF, click the "Print" button for an optimized printout.