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GST Calculator

Add GST to a base price or remove it from a GST-inclusive price. See the CGST/SGST/IGST split instantly.

This GST calculator helps you add GST to a base price or strip GST out of a price that already includes tax, using India's standard slabs of 0.25%, 3%, 5%, 12%, 18%, and 28%. Switch between "Add GST" and "Remove GST" modes depending on whether your starting number is tax-exclusive or tax-inclusive, then choose intra-state or inter-state supply to see the correct split — CGST and SGST divided equally for sales within a state, or IGST alone for sales across state lines. This gst calculator india tool is meant for small business owners, freelancers, and shopkeepers who need GST-inclusive invoice prices or want to reconcile GST components without doing the slab math by hand every time.

Total Price (incl. GST)

₹0

Base Amount₹0
Total GST₹0
CGST₹0
SGST₹0

How to Use GST Calculator

  1. Choose "Add GST" or "Remove GST" mode at the top of the form.
  2. Enter the base amount (or the GST-inclusive amount if removing GST).
  3. Select the applicable GST rate from the dropdown (0.25% to 28%).
  4. Select Intra-state or Inter-state supply type.
  5. View the total price and the CGST/SGST or IGST split update instantly.

Frequently Asked Questions

Enter the base price (ex-GST), select the rate (5%, 12%, 18%, or 28%), choose supply type. The calculator adds tax and shows total price with CGST and SGST split.

Switch to "Remove GST" mode, enter the inclusive price, select the rate. The tool back-calculates the base price and shows how much GST was included.

CGST and SGST are levied on intra-state transactions (split equally at half the GST rate). IGST is levied on inter-state transactions and goes to the central government.

Four main slabs: 5% (essentials), 12% (processed food), 18% (most services and electronics), 28% (luxury goods). Some items are exempt at 0%.