Free Online Sales Tax Calculator — Compute Tax on Any Purchase Instantly
Sales tax calculator helps you instantly compute tax on purchases, find pre-tax price from totals, and calculate multi-item tax breakdowns. Supports GST, VAT, and sales tax rates worldwide with multiple currencies including INR, USD, EUR, GBP, and JPY.
Calculate Sales Tax
Add Items
Calculation Breakdown
How to Use the Sales Tax Calculator
Select Calculation Mode
Choose Add Tax to calculate tax on a price, or Reverse Tax to find the pre-tax price from a tax-inclusive total.
Enter the Price Amount
Type the product price or total amount in your preferred currency. Switch between INR, USD, EUR, GBP, and JPY.
Enter Tax Rate
Enter the applicable sales tax rate percentage. Use quick-select buttons for common rates or type a custom rate.
Click Calculate to See Results
Press Calculate to instantly see tax amount, total price, and detailed breakdown. Copy or download results for your records.
Key Features
100% Free Forever
Calculate sales tax unlimited times without any charges, subscriptions, or hidden fees.
Pinpoint Accuracy
Mathematically precise calculations with proper decimal handling for all currencies.
Instant Results
Get tax calculations in milliseconds with real-time updates as you type values.
Complete Privacy
All calculations happen locally in your browser. No financial data sent anywhere.
No Signup Required
Use immediately without creating accounts, verifying emails, or personal information.
Mobile Friendly
Responsive design works perfectly on phones, tablets, and desktop computers.
How Sales Tax Calculation Works
Add Tax: Total = Price + (Price × Tax Rate ÷ 100) Reverse: Pre-Tax Price = Total ÷ (1 + Tax Rate ÷ 100)Calculation Components
- Base Price: The original price of goods or services before any tax is applied. This is the net amount the seller receives for the product.
- Tax Rate: The percentage set by government authorities. In India, GST rates are 5%, 12%, 18%, and 28%. US sales tax varies by state. EU VAT is typically 17% to 27%.
- Tax Amount: Calculated by multiplying the base price by the tax rate divided by 100. For example, 18% on ₹1,000 equals ₹180 in tax.
- Total Price: The sum of base price plus tax amount. This is what the customer actually pays at checkout or point of sale.
- Reverse Calculation: When you know the total inclusive price, dividing by (1 + rate/100) gives you the original pre-tax price. Essential for accounting and expense reporting.
For example, Amit from Pune buys a laptop priced at ₹45,000 before GST. With 18% GST applied, the tax amount is ₹8,100 and the total price becomes ₹53,100. If Amit sees a price tag of ₹53,100 inclusive of GST and wants to know the actual product cost, using reverse tax mode reveals the pre-tax price of ₹45,000 and GST of ₹8,100. Similarly, Sarah in New York buying a $500 item with 8.875% sales tax would pay $44.38 in tax for a total of $544.38.
Practical Examples
Electronics Purchase — Mumbai
Item: Smartphone ₹25,000 (before GST)
GST Rate: 18%
Tax Amount: ₹4,500
Total payable: ₹29,500 — Common for electronics shopping in India
Restaurant Bill — Delhi (Reverse Tax)
Total Bill: ₹2,360 (GST inclusive)
GST Rate: 18%
Pre-Tax Amount: ₹2,000
GST component: ₹360 — Useful for expense reporting and accounting
Grocery Shopping — Bengaluru (Multi-Item)
Items: Rice ₹800 (5%), Soap ₹150 (18%), Chocolate ₹200 (28%)
Total Tax: ₹40 + ₹27 + ₹56 = ₹123
Grand Total: ₹1,273 — Different GST rates on different items
Online Purchase — New York, USA
Item: Headphones $199.99 (before tax)
Sales Tax: 8.875% (NYC rate)
Tax Amount: $17.75
Total: $217.74 — Standard NYC sales tax calculation
What Is a Sales Tax Calculator?
A Sales Tax Calculator is a financial tool that helps you determine the exact tax amount on any purchase and calculate the total price including tax. It eliminates manual percentage calculations, reducing errors and saving time for shoppers, business owners, accountants, and anyone dealing with taxed transactions.
Sales tax is a consumption tax imposed by governments worldwide on the sale of goods and services. Different countries use different systems — India uses GST (Goods and Services Tax) with slab rates of 5%, 12%, 18%, and 28%. The United States has varying state-level sales taxes ranging from 0% to over 10%. European countries charge VAT (Value Added Tax) typically between 17% and 27%. Japan charges a 10% consumption tax, and the UK applies 20% VAT on most goods.
This calculator serves three key functions. First, the Add Tax mode calculates tax on a pre-tax price to show the total amount payable. Second, the Reverse Tax mode extracts the original pre-tax price from a tax-inclusive amount, which is essential for business accounting and expense reporting. Third, the Multi-Item mode handles multiple products with different tax rates in a single calculation, perfect for shopping trips or business invoicing. Whether you are a student understanding tax concepts, a consumer checking your bill, a freelancer filing expenses, or a business owner managing invoices, this tool provides accurate, instant results with complete privacy.