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GST Calculator

Add or remove GST from any amount — with CGST, SGST & IGST breakdown

%
Original (excl. GST)
₹0
GST Amount
₹0
Total (incl. GST)
₹0
CGST (9%)₹0
SGST (9%)₹0
Effective GST Rate18%
Not professional advice. This calculator is for informational and educational purposes only, based on publicly available rules and rates at the time of writing. It is not a substitute for advice from a qualified chartered accountant, tax professional, or financial advisor — please verify important decisions with one. See our full disclaimer for details.
Last reviewed: October 2026 — rates/slabs checked against official sources. See our methodology.
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GST Rate Slabs in India (post GST 2.0, effective 22 Sep 2025)
GST RateCGSTSGSTIGSTCommon Items
0%0%0%0%Essential food, books, newspapers, unbranded staples
5%2.5%2.5%5%Daily necessities, most food products, agricultural goods, healthcare equipment
18%9%9%18%Standard rate — most goods and services, electronics, small cars, appliances
40%20%20%40%Sin/luxury goods — pan masala, aerated/caffeinated drinks, luxury vehicles, tobacco

The 12% and 28% slabs were discontinued in the GST 2.0 rate rationalisation — goods previously at 12% mostly moved to 5%, and goods previously at 28% moved to either 18% or the new 40% slab. If you need an older rate for a pre-reform transaction, use the custom rate field above.

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What is GST Calculator?

Free GST calculator for India. Add or remove GST from any amount. Get CGST, SGST, IGST breakdown instantly. Supports the current 5%, 18%, 40% GST slabs (post GST 2.0) plus any custom rate. India-specific financial calculators built for the Indian tax system, RBI guidelines, and Indian banking rates. TekPulse's GST Calculator is completely free — no signup, no ads in results, and no data stored on our servers.

How to Use GST Calculator Online

  1. Choose whether you want to Add GST (exclusive) or Remove GST (inclusive) from a price
  2. Enter the base price or GST-inclusive price in Indian Rupees
  3. Select the applicable GST rate: 5%, 18%, or 40% (current slabs post GST 2.0), or enter a custom rate
  4. Instantly see the GST amount, CGST, SGST/UTGST, IGST breakdown and the final price
  5. Copy the result or share it via WhatsApp for invoicing purposes

GST Calculator Formula & Calculation

Add GST: GST Amount = Price × Rate ÷ 100 | Remove GST: Original = Final ÷ (1 + Rate ÷ 100)

For intra-state supply: CGST = SGST = GST Amount ÷ 2. For inter-state supply: IGST = full GST Amount.

Example (Add GST): Product priced at ₹10,000 with 18% GST → GST = ₹1,800 → Final price = ₹11,800 → CGST = ₹900, SGST = ₹900.
Example (Remove GST): Invoice shows ₹11,800 inclusive → Original = 11,800 ÷ 1.18 = ₹10,000 → GST component = ₹1,800.

Key Factors That Affect Your Result

  1. GST slab — Since the GST 2.0 rate rationalisation (effective 22 Sep 2025), India has three main rates: 5% (essentials, most food, daily necessities), 18% (the standard rate — most goods and services), 40% (sin/luxury goods like tobacco, pan masala, luxury vehicles). The earlier 12% and 28% slabs were discontinued. Misapplying the slab means penalty.
  2. Supply type — Intra-state (within same state) attracts CGST + SGST equally split. Inter-state (across states) attracts IGST at the full rate. E-commerce sellers must follow destination state rules.
  3. Composition scheme — Businesses under ₹1.5 crore annual turnover can opt for a flat 1–5% rate with no ITC. Suitable for local retailers; not ideal for B2B businesses that need to pass on credit.
  4. Input Tax Credit (ITC) — Registered GST businesses can claim ITC on GST paid for purchases, reducing their net tax liability. Reconcile monthly on GSTR-2B to avoid mismatches.

Why Use TekPulse GST Calculator?

Runs Entirely in Your Browser
GST amounts are calculated locally — nothing is sent to our servers
100% Free
No hidden charges, no premium tier — always free
Instant Results
Add or remove GST as you type
Mobile-Friendly
Works perfectly on smartphones, tablets, and desktops

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Related Guides

GST Guide for Small Businesses in India GST Inclusive vs Exclusive Price — What's the Difference?

Frequently Asked Questions

GST (Goods and Services Tax) is a unified indirect tax levied on the supply of goods and services in India. It replaced multiple older taxes like VAT, Service Tax, and Excise Duty.

Since the GST 2.0 rate rationalisation (effective 22 September 2025), India has three main GST slabs: 5%, 18%, and 40%, plus 0% for essentials. The earlier 12% and 28% slabs were discontinued — most goods that were at 12% moved to 5%, and most goods that were at 28% moved to 18% or the new 40% slab for sin/luxury goods.

CGST (Central GST) and SGST (State GST) are levied on intra-state transactions and are split equally. IGST (Integrated GST) is levied on inter-state transactions.

To add GST: GST Amount = Price × GST% / 100. Total = Price + GST Amount. To remove GST from an inclusive price: Original Price = Inclusive Price × 100 / (100 + GST%).

Businesses with annual turnover above ₹40 lakhs (₹20 lakhs for services) must register for GST. Inter-state suppliers must register regardless of turnover.

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