Sales Tax Calculator — Free Online Tool
Calculate sales tax amount and final price online for free. Enter price and tax rate to find total cost, or work backwards from a tax-inclusive price.
About Sales Tax Calculator
Our sales tax calculator handles all tax calculation scenarios: find the tax amount and total price from a pre-tax price and tax rate; reverse-calculate the pre-tax price and tax amount from a tax-inclusive total; or find the tax rate from a pre-tax and post-tax price. Works with any tax rate for VAT (UK, EU), GST (India, Canada, Australia), or US state sales tax. Results show tax amount, pre-tax price, and total price clearly. Useful for shopping, invoicing, accounting, and financial planning.
Frequently Asked Questions
What tax rates work with this tool?
Any rate works — US state sales tax, UK VAT, EU VAT, Indian GST, or any custom rate.
Can I calculate tax backwards from a total price?
Yes — enter the total price and the tax rate to find the pre-tax price and exact tax amount.
How is tax calculated?
Tax amount = Price x (Tax Rate / 100). Total price = Price + Tax amount.
Can I find the tax rate from two prices?
Yes — enter the pre-tax price and the total to calculate the tax rate.
Does it round to 2 decimal places?
Yes — all results are rounded to 2 decimal places.