How is total with tax calculated?

Total = Sales amount × (1 + Tax rate% / 100). Tax amount = Sales × (Tax rate% / 100).

Is the rate a percentage?

Yes. Enter the tax rate as a percentage (e.g. 8.25 for 8.25%).

This tool adds tax on top of the sales amount (tax-exclusive). For tax-inclusive, use a reverse tax calculator.

Sales amount plus tax rate to get total with tax.

Sales amount

Tax rate (%)

How is total with tax calculated?: Total = Sales amount × (1 + Tax rate% / 100). Tax amount = Sales × (Tax rate% / 100).
Is the rate a percentage?: Yes. Enter the tax rate as a percentage (e.g. 8.25 for 8.25%).
Included or excluded tax?: This tool adds tax on top of the sales amount (tax-exclusive). For tax-inclusive, use a reverse tax calculator.

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Free temperature converter.

Tip Calculator

Calculate tip and split the bill. Enter bill amount, tip percentage, and number of people.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers. Supports 1–3999.

Combinations Calculator

Calculate C(n,r) — the number of ways to choose r items from n without order. Uses n!/(r!(n-r)!).

Combinations with Replacement Calculator

Calculate the number of ways to choose r items from n with repetition allowed. Formula: C(n+r-1, r).

Even Permutations Calculator

Count how many permutations of n objects are even (expressible as an even number of swaps). For n ≥ 2, equals n!/2.