Understanding tax percentages can help you estimate the amount added to a purchase or deducted from an amount.
Calculating Tax Amount
Suppose an item costs $200 before tax and the applicable tax rate is 10%.
Calculate:
200 × 0.10 = 20
The tax amount is $20.
The final price is:
200 + 20 = $220
Finding the Tax Percentage
If you know the original amount and tax amount, use:
Tax Percentage = (Tax Amount ÷ Pre-Tax Amount) × 100
For example, if the pre-tax amount is $500 and the tax is $75:
(75 ÷ 500) × 100 = 15%
The tax represents 15% of the pre-tax amount.
You can use the Percentage Calculator for the percentage calculation itself.
Important Note
Actual tax rules vary by country, jurisdiction, product, and transaction. A percentage calculator can calculate the mathematics, but it does not determine which tax rate legally applies to a specific transaction