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Sales Tax Calculator
Add sales tax to a pre-tax amount, or back it out of a total. Works with any rate.
Inputs
Your numbers
£
Result
Total: £108.00
Pre-tax£100.00
Sales tax£8.00
Total£108.00
General-purpose calculator. Not tax advice. Combined state, county and city rates can differ within the same US zip code.
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FAQ
Common questions
How do I add sales tax?
Multiply the pre-tax amount by the tax rate as a decimal to get the tax, then add it to the pre-tax amount. For an 8 percent rate, multiply by 0.08.
How do I remove sales tax from a total?
Divide the total by 1 plus the rate as a decimal. For an 8 percent rate, divide by 1.08 to get the pre-tax amount.
Which rate should I use?
Sales tax varies by state, county and city in the US and by product type. Check the rate that applies to your transaction, not a national average.