RupeeMath

GST Calculator India — Add or Extract GST

Instantly calculate GST for any amount. Shows CGST and SGST split for 5%, 12%, 18%, and 28% rates. Works for both adding GST and reverse calculation.

GST Details

Calculation Type

GST Rate

GST Amount

₹₹1,800

18% GST on ₹₹10,000

CGST (50%)

₹₹900

SGST (50%)

₹₹900

Total + GST

₹₹11,800

GST Amount

₹₹1,800

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GST Breakdown

Base Amount (excl. GST)₹₹10,000
CGST @ 9%₹₹900
SGST @ 9%₹₹900
Total GST @ 18%₹₹1,800
Final Amount (incl. GST)₹₹11,800
Original Amount
₹₹10,000
CGST
₹₹900
SGST
₹₹900
Total GST
₹₹1,800
Final Price
₹₹11,800

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What is GST?

GST (Goods and Services Tax) is a comprehensive indirect tax levied on the manufacture, sale, and consumption of goods and services in India. It replaced multiple cascading taxes like VAT, service tax, and excise duty when it was introduced on 1 July 2017. GST operates on a dual structure — CGST (Central GST, collected by the central government) and SGST (State GST, collected by the state government) for intrastate transactions. For interstate transactions, IGST (Integrated GST) applies at the full rate. GST follows a destination-based consumption tax model — it is collected at the point of consumption, not production. India has four primary GST slabs: 5%, 12%, 18%, and 28%, applied based on the nature of goods and services.

How to Use the GST Calculator

  • 1.Calculation Type: Choose "Add GST" if you have the base price and want the final price, or "Extract GST" if you have the GST-inclusive price and want the base amount.
  • 2.Enter Amount: Type the price in the input box.
  • 3.Select GST Rate: Choose 5%, 12%, 18%, or 28% based on the product or service category.
  • 4.Result: See the GST amount, CGST + SGST split, and final price. Download PDF for invoice or record-keeping purposes.

Common GST Rates by Category

5%

Packaged food, medicines, life-saving drugs, economy class air travel, fertilizers, LPG

12%

Processed food, business class travel, mobile phones, computers, butter, cheese

18%

Restaurants, telecom, IT services, electronics, construction (commercial), cement, paint

28%

Luxury cars, SUVs, motorcycles above 350cc, tobacco, aerated drinks, casinos, online gaming

Frequently Asked Questions