GST Calculator — Add or Remove GST Instantly (All Rates)
About This Tool
The GST & Tax Calculator supports 12+ countries and regions worldwide — including India (GST), UK (VAT), EU (MwSt/TVA), Canada (GST/HST), Australia, Singapore, New Zealand, South Africa, Brazil, and more. Add tax to a net amount or extract tax from an inclusive total instantly. Indian users also get the CGST/SGST split for intra-state transactions. Perfect for businesses, accountants, travelers, and anyone dealing with multi-country tax calculations.
How to Use
- Select your Country / Region from the dropdown to auto-load the correct tax name, rate, and currency
- Choose Add Tax (net → gross) or Remove Tax (gross → net)
- Enter the amount — the currency symbol updates automatically
- Select a tax slab/rate if multiple exist, or enter a custom rate for US or Custom mode
- Results appear instantly showing original amount, tax amount, and final amount
Detailed Explanation & Worked Example
The Goods and Services Tax (GST) (or Value Added Tax (VAT) in some countries) is an indirect tax levied on the supply of goods and services. A GST calculator helps you easily determine either the net price (before tax) or gross price (after tax) depending on your needs.
Formulas for Adding and Removing GST
Depending on whether you want to calculate tax-inclusive or tax-exclusive prices, you use different formulas:
- Adding GST (Tax Exclusive to Inclusive):
GST Amount = Original Cost × (GST Rate / 100)Total Cost = Original Cost + GST Amount - Removing GST (Tax Inclusive to Exclusive):
Original Cost = Total Cost / (1 + (GST Rate / 100))GST Amount = Total Cost - Original Cost
Step-by-Step Worked Example (India 18% Rate)
Let's say you purchase a professional software subscription for a base price of $10,000 (tax exclusive) subject to 18% GST:
- Identify parameters:
Original Cost = $10,000andGST Rate = 18% - Calculate GST Amount:
$10,000 × 0.18 = $1,800 - Calculate Total Cost:
$10,000 + $1,800 = $11,800 - Split GST (India only): If it is an intra-state purchase in India, the tax is split equally into CGST (9%) = $900 and SGST (9%) = $900.