Finance
Sales Tax Calculator
Calculate tax amount and final price from subtotal and sales tax rate.
About this sales tax calculator
Estimate sales tax and total price for purchases, invoices, carts, and quick budget checks.
Mavis Tools is built for quick utility work: paste the input, get the result, and move on. The page is static-first for speed, and the interactive work happens in your browser. That makes it useful for drafts, calculations, debugging snippets, and repeat everyday tasks.
This tool is intentionally focused. It does one job clearly instead of asking for an account or hiding the result behind a long workflow. Bookmark it if you need a fast sales tax calculator that works on desktop and mobile.
FAQ
Does it know my local tax rate?
No. Enter the tax rate you want to use.
Can I calculate pre-tax price?
This version calculates tax and total from a subtotal.
Is data uploaded?
Yes. The tool runs in your browser, and the input is not uploaded to a server.