What sales calculators are listed?

Links to list price & markdown, markup, discount, sales tax, and other retail/sales math tools.

Yes. These help with pricing, markdowns, and tax on sales.

Online Index: Sales Calculators

Overview of sales-related calculators: markup, markdown, list price, discount, sales tax, and related tools.

Sales calculator types

What sales calculators are listed?: Links to list price & markdown, markup, discount, sales tax, and other retail/sales math tools.
Useful for retail?: Yes. These help with pricing, markdowns, and tax on sales.

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.