kitty/bin Math
Calculators, statistics, number converters and charts. Free, and all running in your browser.
/
All-in-one
School and statistics
Statistics calculatorMean, median, mode, quartiles and standard deviation for any list of numbers.Standard deviation calculatorPaste your numbers to get the sample and population standard deviation and variance, with the mean and every step.Mean median mode calculatorFind the mean, median, mode and range of any list of numbers.Final grade calculatorFind the score you need on your final exam to reach the grade you want.
Number converters
Number converterBinary, octal, decimal and hex, Roman numerals, and numbers written in words.Binary to decimalConvert binary numbers to decimal, and decimal to binary, as you type.Hex to decimalConvert hexadecimal to decimal and back, with binary and octal shown too.Roman numeral converterConvert numbers to Roman numerals and Roman numerals to numbers, from 1 to 3999.Number to wordsWrite any number out in English words, with or without “and”, or as a check amount with cents.
Money
Mortgage calculatorEstimate your monthly mortgage payment from the home price, down payment, rate and term.Loan calculatorWork out the monthly payment and total interest on a car loan, personal loan or any fixed-rate loan.Compound interest calculatorSee how savings grow with compound interest and regular deposits, compounded yearly to daily, with a year-by-year table.Discount calculatorFind the sale price after a percentage discount, stack a second discount, and add your local sales tax to see the final price and how much you save.Tip calculatorWork out the tip and split the bill between any number of people, with the option to round up each share or the total.
Dates and time
Age calculatorFind an exact age in years, months and days, plus total months, weeks and days, the weekday you were born and the days until your next birthday.Date difference calculatorCount the days, weeks, months and business days between two dates, or add and subtract days from a date.Time calculatorAdd and subtract hours and minutes, find the time between two times even over midnight, and add a duration to a clock time.
Everyday sums
Percentage calculatorWork out X% of a number, what percent one number is of another, percentage change, increase or decrease, and reverse percentages.Unit converterConvert length, mass, volume, temperature, area, speed, data size, time, energy, pressure and fuel economy with exact conversion factors.BMI calculatorCalculate body mass index in kg and cm or in pounds, feet and inches.GPA calculatorCalculate your GPA on the 4.0 scale from letter grades and credits.