Free GST Calculator
Calculate Goods and Services Tax (GST) amounts quickly and accurately with our free online GST calculator. Whether you need to add GST to a price (tax-exclusive) or extract GST from a price (tax-inclusive), this calculator handles both scenarios with multiple tax slab options.
GST Calculator
How the GST Calculator Works
Our GST calculator uses the following formulas to calculate GST amounts:
Tax-Exclusive Calculation (Adding GST)
When you want to add GST to an amount:
- GST Amount = Original Amount × GST Rate
- Total Amount = Original Amount + GST Amount
For example, if the original amount is ₹1,000 and the GST rate is 18%:
- GST Amount = ₹1,000 × 0.18 = ₹180
- Total Amount = ₹1,000 + ₹180 = ₹1,180
Tax-Inclusive Calculation (Extracting GST)
When you want to extract GST from an amount that already includes GST:
- Original Amount = Total Amount ÷ (1 + GST Rate)
- GST Amount = Total Amount - Original Amount
For example, if the total amount is ₹1,180 and the GST rate is 18%:
- Original Amount = ₹1,180 ÷ (1 + 0.18) = ₹1,180 ÷ 1.18 = ₹1,000
- GST Amount = ₹1,180 - ₹1,000 = ₹180
Practical Examples of GST Calculation
Example 1: Invoice Preparation
A business needs to add 18% GST to a product priced at ₹5,000:
- GST Amount = ₹5,000 × 0.18 = ₹900
- Total Amount = ₹5,000 + ₹900 = ₹5,900
The invoice would show: Product Price: ₹5,000, GST (18%): ₹900, Total: ₹5,900
Example 2: Extracting GST from Inclusive Price
A retailer has a product with a price tag of ₹2,360 (including 18% GST) and needs to know the pre-tax amount:
- Original Amount = ₹2,360 ÷ 1.18 = ₹2,000
- GST Amount = ₹2,360 - ₹2,000 = ₹360
The pre-tax amount is ₹2,000, and the GST component is ₹360.
Frequently Asked Questions
What is GST?
GST (Goods and Services Tax) is a value-added tax levied on most goods and services sold for domestic consumption. It is a comprehensive, multi-stage, destination-based tax that is collected on value-added at each stage of the supply chain.
What are the different GST slabs in India?
India has a multi-tier GST structure with four main slabs: 5%, 12%, 18%, and 28%. Some essential items are exempted from GST, while luxury and sin goods may attract additional cess on top of the 28% rate.
How do I know which GST rate applies to my product or service?
The GST rate applicable to your product or service depends on its classification under the HSN (Harmonized System of Nomenclature) code or SAC (Services Accounting Code). You can refer to the official GST rate schedules published by the government or consult with a tax professional.
What is the difference between tax-inclusive and tax-exclusive calculations?
In tax-exclusive calculations, GST is added to the original amount to get the total amount. In tax-inclusive calculations, the total amount already includes GST, and we extract the original amount and GST component from it.
Can I use this calculator for international GST/VAT calculations?
Yes, this calculator can be used for any GST or VAT calculation worldwide by selecting the appropriate tax rate. The formulas remain the same regardless of the country.