Sales Tax Calculator
Calculate sales tax for purchases based on local tax rates
Sales Tax Calculator
Results
Your sales tax calculation
Enter your information to calculate sales tax
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Sales Tax Formulas
1. From Pre-Tax Price
Tax = Pre-Price × (Rate / 100)
After Price = Pre-Price + Tax
2. From After-Tax Price
Pre-Price = After Price / (1 + Rate / 100)
Tax = After Price - Pre-Price
3. Find Tax Rate
Rate = ((After Price / Pre Price) - 1) × 100
Examples
Example 1: Calculate Price
Pre-tax price: $100, Tax rate: 8% → Tax: $8, Final price: $108
Example 2: Reverse Tax Calculation
After-tax price: $108, Tax rate: 8% → Pre-tax price: $100, Tax: $8
Example 3: Find Tax Rate
Pre-tax: $100, After-tax: $108 → Tax rate: 8%
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How to Use This Calculator
Step-by-step guide to get accurate results
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Sales Tax Calculator – Find Pre-Tax, After-Tax & Reverse Sales Tax Instantly
Our online Sales Tax Calculator helps you quickly calculate the sales tax, pre-tax price, after-tax total, and reverse tax in just seconds. Whether you’re shopping, preparing an invoice, or running an eCommerce store, this tool saves time by giving you accurate tax-inclusive and tax-exclusive amounts.
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How the Sales Tax Calculator Works
1. Add Sales Tax (Tax Exclusive → Tax Inclusive)
Total Price = Pre-Tax Price + (Pre-Tax Price × Sales Tax Rate)
2. Find Sales Tax from Total Price (Reverse Tax)
Sales Tax = Total Price – (Total Price ÷ (1 + Tax Rate))
3. Pre-Tax Price from Total (Tax Inclusive → Exclusive)
Pre-Tax Price = Total Price ÷ (1 + Tax Rate)
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Sales Tax Calculation Examples
Example 1 (Add Tax)
Item price = 100 + (108
Example 2 (Reverse Tax)
Total Price (Tax Inclusive) = 108 ÷ 1.08 = 108 – 8
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Common Use Cases
Shopping & Retail, Invoices & Billing, eCommerce, State-Specific calculations (US state taxes), and International use (Canada GST/HST, UK VAT).
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Sales Tax vs VAT (Quick Comparison)
Sales Tax (USA)
Charged at the final point of sale to the consumer.
VAT (UK & EU)
Added at each stage of the supply chain, with businesses reclaiming input tax.
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Why Use This Calculator?
✔ Fast & Accurate instant results
✔ Works for pre-tax, after-tax, and reverse tax
✔ Covers USA, Canada (GST/HST), UK VAT, and more
✔ Perfect for shoppers, freelancers, accountants, and businesses
Frequently Asked Questions
How do you calculate sales tax manually?
Multiply the pre-tax price by the sales tax rate, then add it to the original price.
What is reverse sales tax and when is it useful?
Reverse sales tax helps you find the pre-tax price when you only know the total (tax-inclusive) amount. Useful for receipts, invoices, and accounting.
How do I find sales tax from the total price?
Use this formula: Sales Tax = Total Price – (Total Price ÷ (1 + Tax Rate))
What is the difference between VAT and sales tax?
Sales Tax is collected only at the final sale, while VAT is collected at each stage of production and distribution.
How does tax inclusive vs exclusive pricing work?
Tax Exclusive means tax is added separately to the base price, while Tax Inclusive means the final price already includes tax.
What is the sales tax rate in the USA?
Rates vary by state, e.g., California (7.25%), New York (4% state + local rates), Texas (6.25%). Always check your local rate.
Can I use this calculator for Canada GST/HST or UK VAT?
Yes. The calculator works with any tax rate, including Canada GST/HST and UK VAT.
Is sales tax the same for online shopping and in-store purchases?
It depends. Many US states now require eCommerce sales tax collection, similar to in-store purchases.