Add sales tax to a price or back it out of a total to find the tax amount, pre-tax price and grand total, right in your browser. Estimates only, not tax advice.
Sales Tax Calculator Online
Add sales tax to a price or back it out of a total to find the tax amount, pre-tax price and grand total, right in your browser. Estimates only, not tax advice.
The Sales Tax Calculator runs entirely in your browser. The amounts and rates you enter never leave your device and are not uploaded to ArrayKit. Results are estimates only, not financial or tax advice.
The Sales Tax Calculator adds sales tax to a price or removes it from a tax-included total, so you always know the pre-tax amount, the tax amount and the grand total. Switch to Add tax mode, enter a pre-tax price and a tax rate, and it shows exactly how much tax is owed and what the receipt total will be. Switch to Remove tax mode to work backward from a total that already includes tax — handy when a receipt only shows the final price and you need the pre-tax cost for expense reports or bookkeeping. It's useful for shoppers checking a receipt, sellers quoting prices across states with different rates, and freelancers separating tax from revenue. These are estimates only, not tax or financial advice, since actual rates vary by state, county and product category — everything computes locally in your browser and your figures stay on your device.
Features
Add tax mode calculates the tax amount and total from a pre-tax price
Remove tax mode backs the tax out of a tax-included total
Shows pre-tax amount, tax amount and grand total side by side
Handles fractional tax rates like 7.25% or 8.875%
Copy a plain-text summary of the amount, rate, tax and total
Clear error banner for a negative amount or tax rate
Works with any currency since figures are unitless numbers
Runs entirely in your browser with nothing uploaded
How to use the Sales Tax Calculator
Choose Add tax or Remove tax mode
Enter the amount (pre-tax price, or tax-included total in Remove mode)
Enter the sales tax rate as a percentage
Read the pre-tax amount, tax amount and total in Result
Example
Input
$100 + 8% tax
Output
Tax: $8.00
Total: $108.00
Common errors & troubleshooting
Tax amount looks ten times too small or too large. — Enter the rate as a whole percentage, e.g. 8 for 8%, not 0.08 — the Sales Tax Calculator multiplies by rate% / 100 internally.
Removed tax from a total but the pre-tax amount doesn't match the receipt. — Make sure Remove tax mode is selected and the amount entered is the tax-included total, not the pre-tax price — the two modes solve in opposite directions.
Result shows a banner instead of a total. — Check that both the amount and the tax rate are 0 or more; negative figures are not valid sales tax inputs.
Tax rate differs from what a nearby store charges. — Sales tax rates vary by state, county, city and even product category, so confirm the local combined rate before relying on the result for a real purchase.
Frequently asked questions
What does the Sales Tax Calculator compute?
It computes the pre-tax amount, tax amount and grand total from a price and a tax rate: in Add mode, total = amount × (1 + rate% / 100); in Remove mode, pre-tax amount = total ÷ (1 + rate% / 100).
How do I use the Sales Tax Calculator in reverse?
Switch to Remove tax mode and enter the tax-included total shown on a receipt along with the tax rate. The Sales Tax Calculator backs out the tax to show the original pre-tax price.
Does the Sales Tax Calculator know my local tax rate?
No. You enter the combined sales tax rate for your state, county or city yourself — rates vary widely by location and product type, so the calculator applies whatever rate you type in.
Does the Sales Tax Calculator work in any currency?
Yes. The amount and total are plain numbers, so enter figures in dollars, euros, rupees or any currency and read the results in the same unit.
Is the Sales Tax Calculator tax advice?
No. It gives fast estimates only, not financial or tax advice. Verify the correct rate and any exemptions with a tax professional or your local tax authority before filing or invoicing.
Does the Sales Tax Calculator upload my prices?
No. The Sales Tax Calculator runs entirely in your browser. The amounts you type never leave your device and are not uploaded to ArrayKit.
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