Sales Tax Calculator
Add sales tax to a price, reverse-calculate the pre-tax amount from a total, or estimate tax across multiple items in one cart.
Multi-Item Sales Tax
Add several item prices to estimate the tax and total for a full cart or receipt.
How to Use
- Choose Add tax to price to calculate tax from a pre-tax amount, or switch to Reverse from total to work backward from a tax-inclusive total.
- Select a preset sales tax rate for a common US state or Canadian province, or type a custom rate manually.
- Enter your item price or receipt total to instantly see the tax amount and final or pre-tax price.
- Use the multi-item section to add several item prices and view individual tax amounts, subtotal, total tax, and grand total.
Frequently Asked Questions
How do I calculate sales tax from a price?
Multiply the pre-tax price by the sales tax rate as a decimal. For example, a $100 item with 7.25% tax has $7.25 in tax, making the total $107.25.
How do I reverse-calculate the pre-tax amount from a total?
Divide the total price by 1 plus the tax rate as a decimal. If the total is $108 and the tax rate is 8%, the pre-tax amount is $100 and the tax portion is $8.
Why do local sales tax rates sometimes differ from the state rate?
Many areas add city, county, or district taxes on top of the base state or provincial rate. If your local rate is higher than the preset, enter the exact combined rate manually.
Can I use this for receipts with multiple items?
Yes. The multi-item section lets you enter several prices, then shows tax and total for each item plus combined subtotal, total tax, and grand total.