What is GST/VAT?
GST (Goods and Services Tax) and VAT (Value Added Tax) are consumption taxes applied at each stage of production and distribution. While they work similarly, different countries use different names and rates.
This calculator helps you either add tax to a base price (to find the final price customers pay) or extract tax from an inclusive price (to find the original price before tax).
Add Tax to Price
Calculate what customers will pay including tax
Extract Tax from Price
Find the pre-tax amount from an inclusive price
Any Tax Rate
Works with any country's GST/VAT/sales tax rate
Invoice Ready
Get exact figures for invoices and accounting
Common GST/VAT rates by country:
- India — GST rates: 0%, 5%, 12%, 18%, 28% (varies by goods/services)
- UK — Standard VAT: 20% (reduced rates: 5%, 0%)
- Canada — GST: 5% (HST varies 13-15% in some provinces)
- Australia — GST: 10%
- EU countries — VAT ranges from 17% (Luxembourg) to 27% (Hungary)
GST/VAT Calculation Formulas
There are two main calculations: adding tax to a net price and extracting tax from a gross (tax-inclusive) price.
Add Tax to Price
Gross Price = Net Price × (1 + Rate)
Example: ₹100 + 18% GST
= ₹100 × 1.18 = ₹118
Extract Tax from Price
Net Price = Gross Price ÷ (1 + Rate)
Example: ₹118 includes 18% GST
= ₹118 ÷ 1.18 = ₹100
Finding the Tax Amount
Tax Amount = Net Price × Rate
E.g., 18% of ₹100 = ₹100 × 0.18 = ₹18
Tax Amount = Gross Price - (Gross Price ÷ (1 + Rate))
E.g., 18% in ₹118 = ₹118 - (₹118 ÷ 1.18) = ₹18
Quick Reference: Common Rates
Multiply: 1.05
Multiply: 1.10
Multiply: 1.18
Multiply: 1.20
Input Tax Credit (ITC)
Registered businesses can offset GST/VAT paid on purchases against tax collected on sales. Net Tax Payable = Output Tax - Input Tax. This prevents cascading taxes through the supply chain.