Sales Tax Calculator
Add tax to a price or pull the tax out of a total, and see the net amount, tax amount, and grand total instantly.
Calculate sales tax
Choose whether to add tax on top of a net amount or extract the tax already included in a gross total.
Choose to add tax on top or extract it from a gross total, then enter your amount and rate.
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How the sales tax calculator works
Pick a mode, enter your numbers, and read the breakdown.
Choose your mode
Select whether you want to add tax to a net price or extract tax that is already inside a total.
Enter amount and rate
Type the amount you are working with and the tax rate as a percentage.
See the breakdown
The calculator shows the net amount, the tax amount, and the final total side by side.
Frequently Asked Questions
Common questions about sales tax, VAT, and GST.
To add tax, multiply the net amount by the tax rate and add it to the net to get the total. To extract tax from a gross total, divide the total by one plus the rate to find the net, then subtract to find the tax. This calculator does both for you.
Adding tax starts from a price before tax and calculates the tax on top. Extracting tax starts from a price that already includes tax and works backward to find the net and the tax portion. Pick the mode that matches the number you already have.
They are similar but not identical. Sales tax is charged once at the final sale, while VAT and GST are charged at each stage of the supply chain with credits along the way. For a single calculation the math here works for all three.
Use the rate that applies in your customer location or region, since rates vary by country, state, and sometimes product type. When in doubt, check your local tax authority or your accountant before invoicing.
Apply the right tax automatically on every invoice
Invoice My Clients adds tax to your invoices for you and keeps a clear record, so your totals are correct and your books stay tidy.
Now make the invoice, free and with no signup.
A professional PDF in about a minute. No account, no invoice limit.