Multi-Currency GST Calculator
Calculate GST amounts, inclusive/exclusive prices, and reverse GST calculations
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What is a GST Calculator?
A GST (Goods and Services Tax) Calculator is a financial tool that helps businesses and consumers compute the GST amount included in a product's price or added to it. It simplifies tax calculations for invoices, pricing, and financial planning by automatically determining:
GST Amount (CGST + SGST or IGST)
Pre-GST Price (Exclusive Tax)
Post-GST Price (Inclusive Tax)
Key Features of a GST Calculator
1. GST Calculation Modes
✔ GST Inclusive (Total Price Known) – Finds the tax amount and base price.
✔ GST Exclusive (Base Price Known) – Adds GST to the original price.
2. Multi-Slab GST Support
Calculates tax based on different GST rates:
5% (Essential goods)
12% (Processed foods, electronics)
18% (Most common rate for services & goods)
28% (Luxury items, automobiles)
3. Split Tax Calculation (CGST + SGST vs. IGST)
For Intra-State Sales:
CGST (Central GST) + SGST (State GST) = Equal halves of the GST rate.
Example: 18% GST → 9% CGST + 9% SGST.
For Inter-State Sales:
Only IGST (Integrated GST) applies.
4. Reverse GST Calculation
Extracts the original price from a GST-inclusive amount.
Formula:
5. HSN Code Lookup (Advanced Tools)
Some calculators include HSN (Harmonized System of Nomenclature) codes to auto-apply the correct tax rate.
How to Use a GST Calculator?
Case 1: Adding GST to Base Price (Exclusive Tax)
Input: Base Price = ₹1,000 | GST Rate = 18%
Calculation:
GST Amount = ₹1,000 × 18% = ₹180
Total Price = ₹1,000 + ₹180 = ₹1,180
Case 2: Extracting GST from Total Price (Inclusive Tax)
Input: Total Price = ₹1,180 | GST Rate = 18%
Calculation:
Base Price = ₹1,180 / (1 + 0.18) = ₹1,000
GST Amount = ₹1,180 – ₹1,000 = ₹180
Case 3: Intra-State vs. Inter-State Tax
Intra-State Sale (CGST+SGST):
Total GST = 18% → 9% CGST + 9% SGST
Inter-State Sale (IGST):
Total GST = 18% IGST