GST Calculator
All amounts are in Indian Rupees (₹).
Calculate GST for India's standard rates — 5%, 12%, 18%, and 28%. Add GST to a base price or remove GST from a GST-inclusive price. See the CGST, SGST breakdown and the final total instantly. Free, no signup required.
Three steps. No setup.
Drop your content into the field above, or type directly into it. The tool starts working the moment you do — no button to press.
Everything is calculated locally in your browser as you type. No waiting, no uploading, no server involved.
Hit Copy to grab the result, or Download if the tool offers a file. Close the tab — nothing is stored.
Free, private, and built to last.
GST Calculator is a free online tool that runs entirely in your browser. No data is sent to any server — your input stays private on your device and disappears the moment you close the tab.
It is designed to be fast, simple, and accessible to everyone — whether you are a developer, marketer, student, or business owner. No signup, no ads, no nonsense. Just the tool, ready when you need it.
Frequently Asked Questions
To add GST: multiply the base price by the GST rate and divide by 100, then add to the base price. Example: base price $1,000 at 18% GST → GST amount = $180 → total = $1,180. Use the 'Add GST' mode in this calculator for instant results.
To reverse-calculate GST from a GST-inclusive price: GST amount = Inclusive Price × Rate ÷ (100 + Rate). Example: $1,180 inclusive at 18% → GST = $1,180 × 18 ÷ 118 = $180 → base price = $1,000. Use the 'Remove GST' mode in this tool.
CGST (Central GST) and SGST (State GST) are the two components of GST for intra-state transactions in India. Each is exactly half the total GST rate. For an 18% GST transaction, CGST is 9% and SGST is 9%. For inter-state transactions, IGST (Integrated GST) applies at the full rate instead.
India's GST has four main rates: 5% (essential goods like food items, healthcare), 12% (processed foods, computers), 18% (most goods and services, including consumer electronics and restaurants), and 28% (luxury goods, tobacco, automobiles). A 0% rate applies to exempt items like fresh produce and educational services.
Yes. Switch to 'Remove GST' mode, enter the GST-inclusive price and select the rate. The calculator shows the original pre-GST price, the GST amount (split into CGST and SGST), and confirms the inclusive total.