Math & Finance

Convert numbers between binary, octal, decimal, and hexadecimal.

Convert between Arabic numbers and Roman numerals instantly.

Calculate percentages: X% of Y, A is what % of B, % change.

Calculate tip amount and total per person.

Split a restaurant bill with tip evenly among friends.

Calculate the final price and savings by percentage or fixed amount.

Calculate Body Mass Index with metric or imperial units.

Calculate your ideal body weight using 4 medical formulas.

Calculate simple interest and total amount for any principal, rate, and time.

Calculate mean, variance, and standard deviation of a data set.