Sales Tax Calculator
Calculate sales tax instantly with GST inclusive/exclusive modes and location-based tax rates
How to Use Sales Tax Calculator
GST Inclusive Mode
When the total price already includes tax, this calculator extracts the tax amount from the total.
- Enter the total amount
- Select “GST Inclusive”
- Enter tax percentage
- Get tax amount and base price
GST Exclusive Mode
When you need to add tax to a base price, this calculator computes the total amount.
- Enter the base amount
- Select "GST Exclusive"
- Enter tax percentage
- Get total amount with tax
How Sales Tax is Calculated
GST Inclusive Formula
Tax Amount = Total Amount × (Tax Rate ÷ (100 + Tax Rate))This formula extracts the tax amount from a price that already includes tax.
GST Exclusive Formula
Total Amount = Base Amount × (1 + Tax Rate ÷ 100)This formula adds tax to a base price to get the total amount.
Frequently Asked Questions
To calculate sales tax, multiply the purchase price by the sales tax rate. For example, if an item costs ₹100 and the tax rate is 8%, the sales tax would be ₹100 × 0.08 = ₹8, making the total ₹108.
GST inclusive means the tax is already included in the displayed price. GST exclusive means the tax will be added to the displayed price at checkout. Our calculator handles both scenarios with different formulas.
Sales tax rates vary by location (city, state, country). Our calculator allows you to specify your location to get more accurate calculations based on local tax rates. You can enter your city, state, and country for reference.
Yes, this calculator is suitable for both personal and business use. It provides accurate calculations with detailed breakdowns that can be useful for accounting, invoicing, and financial planning purposes.
Use the current sales tax rate for your location. In the US, this typically ranges from 0-13% depending on your state and local taxes. For GST/VAT, rates vary by country (e.g., 10% in Australia, 20% in the UK, 5-15% in Canada).