Sales Tax
Calculator.
Enter the pre-tax amount and the tax rate to instantly see the tax added and the final price. Flip to Tax Inclusive mode to reverse-engineer the net price from a total. Everything runs in your browser.
What is sales tax?
Sales tax is a consumption tax charged on the sale of goods and services. It is usually a percentage of the pre-tax price, added at the point of sale. Common examples include the US state and local sales tax, India's GST, and the European VAT.
Add tax (tax exclusive)
When the price quoted is before tax, multiply the amount by the tax rate to get the tax, then add it back for the total.
Tax = Amount × Rate / 100 Total = Amount + Tax
Reverse tax (tax inclusive)
When the price quoted already includes tax, divide by
1 + rate/100 to recover the pre-tax amount.
Amount = Total / (1 + Rate / 100) Tax = Total − Amount
EX: Pre-tax 1000 at 18% GST Tax = 1000 × 0.18 = 180 Total = 1000 + 180 = 1180
Frequently asked questions
What does Sales Tax Calculator do?
Add or remove sales tax/VAT/GST at any rate. The whole thing runs in your browser tab, so it is ready the moment the page finishes loading.
Is Sales Tax Calculator free to use?
Yes. Sales Tax Calculator is completely free on ToolMunch — no trial, no premium tier holding back the main feature, and no daily or hourly cap on how many times you can use it.
Do I need to create an account or sign up?
No. There is no account, no email address, and no login. Open Sales Tax Calculator, do the job, and take the result — nothing is gated behind a signup form.
Are the numbers I enter sent to a server?
No. Sales Tax Calculator runs entirely inside your browser tab, so what you type never leaves your own device. Nothing is uploaded, which means there is no copy of it on a server to worry about.
Does Sales Tax Calculator work on Mac, Windows, and phones?
Yes. Sales Tax Calculator runs in any modern web browser on Windows, macOS, Linux, Chromebook, Android, and iOS. There is nothing to download or install.
Can I use it as many times as I want?
Yes. There is no queue, no per-hour quota, and no counter that runs out — run Sales Tax Calculator as often as the work needs.