SwiftCalcTools

GST Calculator — Calculate GST on Any Amount

Add or remove GST from any price. Calculate CGST, SGST, and IGST amounts for all GST slabs — 5%, 12%, 18%, and 28%.

💰 Finance & Money ✅ Free ⭐ Popular

By SwiftCalcTools Editorial Team · Formula verified

Loading GST Calculator…

Preparing your calculator

How to Use GST Calculator

  1. 1Enter the required values in the input fields above.
  2. 2Click the Calculate button or results update instantly as you type.
  3. 3View your results in the output panel below the inputs.
  4. 4Adjust any values to recalculate instantly.

Frequently Asked Questions

Goods and Services Tax (GST) is India's unified indirect tax that replaced multiple taxes (VAT, service tax, excise duty) from July 2017. It has 4 main rates: 5%, 12%, 18%, 28%. For intra-state transactions, it splits into CGST (Central) and SGST (State). For inter-state transactions, IGST applies.
For intra-state sales (within same state): CGST (Central GST) + SGST (State GST), each at half the total rate. For inter-state sales (across states): IGST (Integrated GST) at the full rate, which the central government then distributes to the destination state.
GST-exempt items include: fresh fruits and vegetables, milk, eggs, bread, salt, cereals, fresh meat/fish, educational services, healthcare services, postal services, and government services. These are listed in Schedule I of CGST Act.
GST registration is mandatory if: annual aggregate turnover exceeds ₹40 lakh (₹20 lakh for services, ₹10 lakh for special category states). Businesses involved in inter-state supply, e-commerce, or casual taxable persons must register regardless of turnover.
ITC allows businesses to deduct the GST paid on purchases (inputs) from the GST collected on sales (output). This eliminates the cascading effect of taxes. For example, if you paid ₹1,800 GST on raw materials and collected ₹3,600 GST on sales, you only remit ₹1,800 to the government.
HSN (Harmonised System of Nomenclature) codes classify goods for GST. SAC (Service Accounting Code) codes classify services. Businesses with turnover above ₹5 crore must mention 6-digit HSN codes on invoices; smaller businesses can use 4-digit codes. These codes determine the applicable GST rate.