GST Calculator India
Calculate GST for 5%, 12%, 18%, 28% instantly
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Free Forever
Works on Mobile
CGST/SGST Split
Quick Examples
Popular GST Calculations
By Service/Product:
How GST Calculation Works
1
Enter your product or service amount
2
Select GST rate (5%, 12%, 18%, or 28%)
3
Choose calculation type (inclusive or exclusive)
4
Get instant GST amount and total price with CGST/SGST breakdown
All calculations happen in your browser — your data never leaves your device
GST Formula & Examples
GST Amount = (Base Price × GST Rate) ÷ 100
Total Price = Base Price + GST Amount
Reverse GST: Base Price = Total × 100 ÷ (100 + Rate)
Example 1 (Exclusive): ₹10,000 + 18% GST
GST = ₹1,800 | Total = ₹11,800
Example 2 (Inclusive): ₹11,800 includes 18% GST
Base = ₹10,000 | GST = ₹1,800
GST = ₹1,800 | Total = ₹11,800
Example 2 (Inclusive): ₹11,800 includes 18% GST
Base = ₹10,000 | GST = ₹1,800
CGST, SGST & IGST Explained
Intra-State (Same State)
CGST + SGST (split equally)
Example: 18% = 9% CGST + 9% SGST
Inter-State (Different States)
IGST (full rate)
Example: 18% = 18% IGST
GST Rate Slabs (2025)
0%Essential itemsMilk, eggs, fresh fruits, bread
5%Essential goodsSugar, tea, medicines, edible oils
12%Standard goodsButter, cheese, cell phones, toys
18%Majority servicesIT services, telecom, AC restaurants
28%Luxury goodsCars, ACs, tobacco, aerated drinks
Why Use This GST Calculator
- 100% Private - No data stored, no server upload
- Instant calculations as you type
- Works on all devices (mobile, tablet, desktop)
- Completely free, no sign-up required
- Detailed CGST/SGST/IGST breakdown
- Invoice-ready format for billing
- Reverse GST calculation included
Frequently Asked Questions
What are the GST rates in India for 2025?
India has four main GST slabs: 0% (essential items), 5% (essential goods like sugar, tea, medicines), 12% (standard goods like butter, cheese, cell phones), 18% (majority of goods and services like IT services, telecom, AC restaurants), and 28% (luxury goods like cars, ACs, tobacco).
How is GST calculated on MRP products?
MRP (Maximum Retail Price) already includes GST. Use the "Price includes GST" option to find the base price and GST amount. Formula: Base Price = (MRP × 100) ÷ (100 + GST Rate). For example, MRP ₹1,180 with 18% GST = Base Price ₹1,000, GST ₹180.
What is the difference between CGST, SGST, and IGST?
For intra-state sales (within same state): CGST (Central GST) and SGST (State GST) are split equally. Total GST rate = CGST + SGST. For inter-state sales (across states): IGST (Integrated GST) is collected at full rate. Example: 18% intra-state = 9% CGST + 9% SGST, 18% inter-state = 18% IGST.
Who needs GST registration in India?
Businesses with annual turnover > ₹40 lakhs for goods (>₹20 lakhs for special category states) or >₹20 lakhs for services (>₹10 lakhs for special category). Inter-state suppliers must register regardless of turnover. E-commerce operators also require mandatory registration.
What is Input Tax Credit (ITC)?
Input Tax Credit allows businesses to claim credit for GST paid on purchases against GST collected on sales. Example: You pay ₹1,000 GST on raw materials and collect ₹1,500 GST on finished goods — you pay only ₹500 net GST. This eliminates the cascading tax effect.
What is the Composition Scheme?
Small taxpayers with turnover < ₹1.5 crore can opt for Composition Scheme. Pay tax at 1% (manufacturers), 2.5% (restaurants), or 0.5% (traders). Benefits: fewer returns, less compliance. Disadvantages: cannot claim ITC, cannot issue tax invoices, cannot make inter-state sales.
Is this GST calculator really free?
Yes, completely free! No sign-up, no credit card, no hidden fees. Your data never leaves your browser — we don't store or log anything. Use it for business invoicing, retail pricing, or tax compliance as many times as you need.