How to calculate California sales tax
Multiply the price by the combined rate. At the 7.25% statewide rate, a $250.00 sale carries $18.13 of sales tax, for a total of $268.13. Add the county, city or district rate for the delivery address to get the full rate for that sale.
To find the tax inside a total that already includes it, divide the total by 1 plus the rate. A $107.00 receipt at 7.25% is $99.77 before tax and $7.23 of tax.
